DTC table: VAG codes

2002 Volkswagen Golf GLS, 2.0 K, StandardSECTION DTC table: VAG codes

WARNING: This page is about a different variant/trim than selected.

NOTE:

DTC tables are listed according to VAG code.
Explanation of DTC types (e.g. "open circuit/short circuit to ground"):
See Scan Tool (ST) operating instructions
If DTCs are indicated:
Check wiring and connectors to these components as well as ground connections according to wiring diagram. This particularly applies if DTCs are displayed as "occurring sporadically" (SP).
Erase DTC memory after correcting DTC, see DIAGNOSTIC TROUBLE CODE (DTC) MEMORY, CHECKING AND ERASING and reset readiness code, see Readiness code, setting .
VAG 1551 print out, for example:

16502 P0118 035

Engine Coolant Temperature (ECT) sensor -G62-

Signal too high

Sporadic DTC

Explanation:
16502 - DTC code
P0118 - Additional DTC code
035 = DTC type as a number
Engine Coolant Temperature (ECT) sensor -G62- = DTC current path or DTC location
Signal too high = DTC type as text
Sporadic DTCs = intermittent DTCs; e.g. loose contact

DTC 00668 & 00671

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
00668 Voltage terminal 30
Implausible signal	Power supply (terminal 30, B+) relay -J317- inoperative Relay sticks (sporadically)	Engine will not start Various running problems	Check ECM voltage supply, see Diesel direct injection system voltage supply, checking
00671 Cruise Control Switch -E45-
Undefined switch position	-E45- inoperative Open/short circuit	Cruise control off	Check cruise control:

DTC 00741, 1044 & 01117

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
00741 Brake pedal monitoring
Implausible signal	Brake Light Switch -F- inoperative Cruise Control/Diesel Direct Fuel Injection (DFI) Brake Pedal Switch -F47- inoperative	Glow Plug Indicator Light -K29- blinks Brake light inoperative	Check -F- and -F47-, see Brake light switch F and Brake Pedal Switch F47, checking
01044 Control Module incorrectly coded
(no display)	Invalid Control Module code	Glow Plug Indicator Light - K29- blinks	Code Control Module, see Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) J248, replacing
01117 Load signal for Generator terminal DF
Implausible signal	Generator (GEN) inoperative Voltage regulator inoperative Open circuit	Engine warm-up (pre-heat) inoperative	Check Generator

DTC 01193, 1194 & 01282)

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
01193 Pre Heating Coolant/Low Heat Output Relay -J359-
Short to positive (B+)	-J359- inoperative Open circuit or short to positive (B+)	Engine preheat inoperative	Check -J359-, see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM)
01194 Pre Heating Coolant/High Heat Output Relay -J360-
Short to positive (B+)	-J360- inoperative Open circuit or short to positive (B+)	Engine preheat inoperative	Check -J360-, see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM)
01282 Change-over valve for Intake manifold flap -N239-
Open circuit/short to ground	-N239- inoperative Wiring open circuit or short to ground	Abrupt engine stop	Check intake manifold changeover flap -N239-, see Intake Manifold Flap Change-over Valve N239, checking
Short to positive (B+)	Short to positive (B+)	Abrupt engine stop

DTC 16485 P0101, 16486 P0102 & 16487 P0103

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
16485 P0101 Mass Air Flow (MAF) Sensor -G70-
Signal too low	-G70- inoperative Open circuit/short to positive (B+)	Reduced power Black smoke	Check -G70-, see Mass Air Flow (MAF) sensor G70, checking
16486 P0102 Mass Air Flow (MAF) Sensor -G70-
Signal too low	-G70- inoperative Open circuit/short to positive (B+)	Reduced power Black smoke	Check Mass Air Flow Sensor -G70-, see Mass Air Flow (MAF) sensor G70, checking
16487 P0103 Mass Air Flow (MAF) Sensor -G70-
Signal too high	-G70- inoperative Open circuit/short to ground	Reduced power Black smoke	Check Mass Air Flow sensor -G70-, see Mass Air Flow (MAF) sensor G70, checking

DTC 16489 P0105 & 16490 P0106

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
16489 P0105 Manifold Absolute Pressure (MAP) Sensor -G71-
Voltage supply	-G71- inoperative Wiring open circuit or short circuit	Reduced output Increased emission figures	Check Manifold Absolute Pressure (MAP) Sensor, see Manifold Absolute Pressure (MAP) sensor G71 and Barometric Pressure (BARO) sensor F96, checking
16490 P0106 Manifold Absolute Pressure (MAP) Sensor -G71-
Implausible signal	-G71- inoperative Wiring open circuit or short to ground	Reduced output Increased emission figures	Check Manifold Absolute Pressure (MAP) Sensor, see Manifold Absolute Pressure (MAP) sensor G71 and Barometric Pressure (BARO) sensor F96, checking

DTC 16491 P0107, 16492 P0108 & 16500 P0116

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
16491 P0107 Manifold Absolute Pressure (MAP) Sensor -G71-
Signal too low	-G71- inoperative Wiring open circuit or short to ground	Reduced output Increased emission figures	Check Manifold Absolute Pressure (MAP) Sensor, see Manifold Absolute Pressure (MAP) sensor G71 and Barometric Pressure (BARO) sensor F96, checking
16492 P0108 Manifold Absolute Pressure (MAP) Sensor -G71-
Signal too high	-G71- inoperative Wiring open circuit or short to ground	Reduced output Increased emission figures	Check Manifold Absolute Pressure (MAP) Sensor, see Manifold Absolute Pressure (MAP) sensor G71 and Barometric Pressure (BARO) sensor F96, checking
16500 P0116 Engine Coolant Temperature Sensor -G62-
Implausible signal	-G62- inoperative	Black smoke when starting Glow period is always approx. 20 seconds	Check Engine Coolant Temperature (ECT) sensor -G62-, see Engine Coolant Temperature (ECT) sensor G62, checking

DTC 16501 P0117, 16502 P0118 & 16566 P0182

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
16501 P0117 Engine Coolant Temperature Sensor -G62-
Signal too low	-G62- inoperative Wiring open circuit or short to ground	Black smoke during start Glow period always takes about 20 seconds	Check Engine Coolant Temperature (ECT) sensor -G62-, see Engine Coolant Temperature (ECT) sensor G62, checking
16502 P0118 Engine Coolant Temperature Sensor -G62-
Signal too high	-G62- inoperative Wiring open circuit or short to positive (B+)	Black smoke during start Glow period always takes about 20 seconds	Check Engine Coolant Temperature (ECT) sensor -G62-, see Engine Coolant Temperature (ECT) sensor G62, checking
16566 P0182 Fuel temperature sensor -G81-
Short to ground	-G81- inoperative Wiring short to ground	Goes to predetermined value - 5.4 °C Increased emission figure	Check Fuel Temperature Sensor -G81-, see Fuel temperature sensor G81, checking

DTC 16567 P0183 & 16600 P0216

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
16567 P0183 Fuel temperature sensor -G81-
Open/Short to positive (B+)	-G81- inoperative Wiring open circuit or short to positive (B+)	Goes to predetermined value - 5.4 °C Increased emission figure	Check Fuel Temperature Sensor -G81--, see Fuel temperature sensor G81, checking
16600 P0216 Cold Start Injector -N108-
Malfunction	Wiring open circuit Cold Start Injector valve inoperative	Engine knocks at idle, because commencement of injection is constantly "advanced"	Check Cold Start Injector -N108-, see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM)
Malfunction	Short to ground	Poor performance, because commencement of injection is constantly "retarded"

DTC 16609 P0225 & 16610 P0226

DTC

VAG 1551 display

Possible causes

Possible effects

Corrective action

16609 P0225
Throttle Position (TP) Sensor -G79-

Voltage supply

Operating voltage too high or too low
Wiring open circuit

Glow period warning lamp flashes
Increased idle speed

Check Throttle Position Sensor -G79-
See Throttle Position (TP) sensor, checking

16610 P0226
Throttle Position (TP) Sensor -G79-

Implausible signal

-G79- defective

Increased idle speed

Check Throttle Position Sensor -G79-
See Throttle Position (TP) sensor, checking

⁽⁾	Incorrect fault text display. Display must indicate: Throttle Position (TP) Sensor -G79- implausible signal

DTC 16612 P0228

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
16612 P0228 Throttle Position (TP) Sensor -G79-
Signal too high	-G79- defective	Increased idle speed	Check Throttle Position Sensor -G79- See Throttle Position (TP) sensor, checking

DTC 16618 P0234 & 16629 P0245

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
16618 P0234 Boost pressure control
Control limit exceeded	Hose connections interchanged, not attached	Boost pressure too high	Check Wastegate Bypass Regulator Valve -N75-, see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM)
Control limit exceeded	Hose connections interchanged, not attached	Reduced output	Check charge pressure control See Charge air system with turbocharger
16629 P0245 Wastegate Bypass Regulator Valve -N75-
Open circuit/short to ground	Wiring open circuit Solenoid valve defective	Reduced output Boost pressure too low	Check Wastegate Bypass Regulator Valve -N75-, see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM)
Open circuit/short to ground	Short to ground	Reduced output Boost pressure too high

DTC 16630 P0246 & 16684 P0300

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
16630 P0246 Wastegate Bypass Regulator Valve -N75-
Short to positive	Short to positive	Reduced output Boost pressure too low	Check Wastegate Bypass Regulator Valve -N75-, see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM)
16684 P0300 Misfiring detected
No combustion in one or more cylinders No compression pressure	Reduced output Engine runs rough Increased emission figures	Check compression pressure See Compression pressures, checking

DTC 16685 P0301 & 16686 P0302

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
16685 P0301 Misfiring recognized
No. 1 Cyl.	No combustion in No. 1 Cyl. No compression pressure	Reduced output Engine runs rough Increased emission figures	Check compression pressure See Compression pressures, checking
16686 P0302 Misfiring recognized
No. 2 Cyl.	No combustion in No. 2 Cyl. No compression pressure

DTC 16687 P0303 & 16688 P0304

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
16687 P0303 Misfiring recognized
No. 3 Cyl.	No combustion in No. 3 Cyl. No compression pressure	Reduced output Engine runs rough Increased emission figures	Check compression pressure See Compression pressures, checking
16688 P0304 Misfiring recognized
No. 4 Cyl.	No combustion in No. 4 Cyl. No compression pressure

DTC 16705 P0321 & 16706 P0322

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
16705 P0321 Engine RPM Sensor -G28-
Implausible signal	-G28- inoperative RPM sensor/sensor wheel gap too wide Metal chips on -G28- or retaining base loose	Engine will not start Engine stalls Glow Plug Indicator Lamp -K29- flashes Speedometer inoperative	Check Engine RPM Sensor -G28-, see Engine Speed (RPM) Sensor G28, checking
16706 P0322 Engine RPM Sensor -G28-
No signal	-G28- inoperative Open/short circuit	Engine will not start Engine stalls Glow Plug Indicator Lamp -K29- flashes Speedometer inoperative	Check Engine RPM Sensor -G28-, see Engine Speed (RPM) Sensor G28, checking

DTC 16785 P0401 & 16786 P0402

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
16785 P0401 Exhaust gas recirculation (EGR) system
Gas flow too low	Short to positive (B+) EGR vacuum regulator solenoid valve malfunction	No EGR	Check EGR Vacuum Regulator Solenoid Valve -N18-, see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM)
16786 P0402 Exhaust gas recirculation (EGR) system
Gas flow too high	Short to positive (B+) EGR vacuum regulator solenoid valve malfunction	No EGR	Check EGR Vacuum Regulator Solenoid Valve -N18-, see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM)

DTC 16885 P0501 & 16955 P0571

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
16885 P0501 Vehicle Speed Signal (VSS)
Implausible signal	No signal from Speedometer Vehicle Speed (VSS) Sensor -G22-	Speedometer display inoperative Cruise control off Vehicle jerks when changing gear Air conditioner off	Check Speedometer Vehicle Speed (VSS) sensor, see Speed signal, testing
16955 P0571 Brake light switch -F
Implausible signal	Brake light switch (F) defective Brake pedal switch (F47) defective	Glow period warning lamp flashes Brake light defective	Check -F- and -F47-, see Brake light switch F and Brake Pedal Switch F47, checking

DTC 16985 P0601, 16989P0605 & 16990 P0606

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
16985 P0601
Engine Control Module (ECM) -J248- inoperative	ECM inoperative	Various running problems Engine stops	Replace Engine Control Module (ECM) -J248-, see Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) J248, replacing
16989 P0605
Engine Control Module (ECM) - J248- inoperative	ECM inoperative	Various running problems Engine will not start	Replace Engine Control Module (ECM) -J248-, see Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) J248, replacing
16990 P0606
Engine Control Module (ECM) -J248- inoperative	ECM inoperative	Various running problems Engine stops	Replace Engine Control Module (ECM) -J248-, see Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) J248, replacing

DTC 17054 P0670, 17055 P0671 & 17056 P0672

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
17054 P0670 Glow Period Control Module -J370-, electrical circuit
Malfunction in electrical circuit	Wiring open circuit or short to ground -J370- inoperative	No glow period Poor cold starting	Check Glow Period Control Module -J370-
17055 P0671 Glow plug cyl. 1
Malfunction in electrical circuit	Wiring open circuit or short to ground Glow plug inoperative	No glow period Poor cold starting	Check glow plug system, see Glow plug system, checking
17056 P0672 Glow plug cyl. 2
Malfunction in electrical circuit	Wiring open circuit or short to ground Glow plug inoperative	No glow period Poor cold starting	Check glow plug system, see Glow plug system, checking

DTC 17057 P0673 & 17058 P0674

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
17057 P0673 Glow plug cyl. 3
Malfunction in electrical circuit	Wiring open circuit or short to ground Glow plug inoperative	No glow period Poor cold starting	Check glow plug system, see Glow plug system, checking
17058 P0674 Glow plug cyl. 4
Malfunction in electrical circuit	Wiring open circuit or short to ground Glow plug inoperative	No glow period Poor cold starting	Check glow plug system, see Glow plug system, checking

DTC 17068 P0684 & 17552 P1144

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
17068 P0684 Glow Period Control Module -J370-
Implausible signal	No connection to Engine Control Module -J370- defective	No glow period Poor cold starting	Check Glow Period Control Module -J370-
17552 P1144 Mass Air Flow (MAF) Sensor -G70-
Open circuit/short to ground	-G70- inoperative Open circuit/short to ground	Reduced power Black smoke	Check Mass Air Flow Sensor -G70-, see Mass Air Flow (MAF) sensor G70, checking

DTC 17553 P1145, 17554 P1146 & 17563 P1155

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
17553 P1145 Mass Air Flow (MAF) Sensor -G70-
Short to positive (B+)	-G70- inoperative Open circuit/short to positive (B+)	Reduced power Black smoke	Check Mass Air Flow Sensor -G70-, see Mass Air Flow (MAF) sensor G70, checking
17554 P1146 Mass Air Flow (MAF) Sensor -G70-
Supply voltage	Operating voltage too high or too low Open circuit	Reduced power Black smoke	Check Mass Air Flow Sensor -G70-, see Mass Air Flow (MAF) sensor G70, checking
17563 P1155 Manifold Absolute Pressure (MAP) Sensor -G71-
Short to positive (B+)	-G71- inoperative Short to positive (B+)	Reduced power	Check Manifold Absolute Pressure Sensor -G71-, see Manifold Absolute Pressure (MAP) sensor G71 and Barometric Pressure (BARO) sensor F96, checking

DTC 17564 P1156, 17565 P1157 & 17566 P1158

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
17564 P1156 Manifold Absolute Pressure (MAP) Sensor -G71-
Open circuit/short to ground	-G71- inoperative Open circuit/short to ground	Reduced power Increased emission values	Check Manifold Absolute Pressure Sensor -G71-, see Manifold Absolute Pressure (MAP) sensor G71 and Barometric Pressure (BARO) sensor F96, checking
17565 P1157 Manifold Absolute Pressure (MAP) Sensor -G71-
Supply voltage	G71 inoperative Open circuit/short circuit	Reduced power Increased emission values	Check Manifold Absolute Pressure Sensor -G71-, see Manifold Absolute Pressure (MAP) sensor G71 and Barometric Pressure (BARO) sensor F96, checking
17566 P1158 Manifold Absolute Pressure (MAP) Sensor -G71-
Implausible signal	-G71- inoperative	Reduced power Increased emission values	Check Manifold Absolute Pressure Sensor -G71-, see Manifold Absolute Pressure (MAP) sensor G71 and Barometric Pressure (BARO) sensor F96, checking

DTC 17568 P1160, 17569 P1161 & 17570 P1162

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
17568 P1160 Intake Air Temperature (IAT) Sensor -G72-
Short to ground	-G72- inoperative Short to ground	Constant temperature of 136.8 °C (275 °F)	Check Intake Air Temperature Sensor -G72-, see Checking intake manifold temperature sensor
17569 P1161 Intake Air Temperature (IAT) Sensor -G72-
Open circuit/short to positive (B+)	-G72- inoperative Open circuit or short to positive (B+)	Goes to constant temperature of 136.8 °C (275 °F) Engine glow period inoperative	Check Intake Air Temperature Sensor -G72-, see Checking intake manifold temperature sensor
17570 P1162 Fuel Temperature Sensor -G81-
Short to ground	-G81- inoperative Short to ground	Increased emission values	Check Fuel Temperature Sensor -G81--, see Fuel temperature sensor G81, checking

DTC 17571 P1163, 17572P1164 & 17653 P1245

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
17571 P1163 Fuel Temperature Sensor -G81-
Open circuit/short to positive (B+)	-G81- inoperative Open circuit/short to positive (B+)	Goes to predetermined value - 5.4 °C Increased emission values	Check Fuel Temperature Sensor -G81--, see Fuel temperature sensor G81, checking
17572 P1164 Fuel Temperature Sensor -G81-
Implausible signal	-G81- inoperative Wiring open circuit	Increased emission values	Check Fuel Temperature Sensor -G81--, see Fuel temperature sensor G81, checking
17653 P1245 Needle Lift Sensor -G80-
Short to ground	-G80- inoperative Short to ground	Glow Plug Indicator Lamp -K29- flashes Engine runs rough Reduced power Increased emission values	Check Needle Lift Sensor -G80-, see Needle lift sensor G80, checking

DTC 17654 P1246 & 17655 P1247

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
17654 P1246 Needle Lift Sensor -G80-
Implausible signal	-G80- inoperative No. 3 Cyl. injector line damaged Fuel shortage Air in fuel system	Glow Plug Indicator Lamp -K29- flashes Engine runs rough Reduced power Increased emission values	Check Needle Lift Sensor -G80-, see Needle lift sensor G80, checking
17655 P1247 Needle Lift Sensor -G80-
Open circuit/short to positive (B+)	-G80- inoperative Open circuit/short circuit	Glow Plug Indicator Lamp -K29- flashes Engine runs rough Reduced power Increased emission values	Check Needle Lift Sensor -G80-, see Needle lift sensor G80, checking

DTC 17656 P1248

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
17656 P1248 Cold Start Injector -N108-
Control difference	Cold Start Injector -N108- inoperative Needle Lift Sensor -G80- Fuel tank empty Fuel supply low Start of delivery not OK.	Engine runs rough Reduced power Increased emission values Poor cold start	Check Cold Start Injector -N108-, see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM) Check Needle Lift Sensor -G80-, see Needle lift sensor G80, checking Check and adjust injection start control dynamically, see Start of injection, dynamically checking and adjusting Fuel filter or fuel line blocked

DTC 17659 P1251 & 17660 P1252

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
17659 P1251 Cold Start Injector-N108-
Short to positive (B+)	Short to positive (B+)	Engine knocks at idle, start of injection is "advanced" continuously	Check Cold Start Injector -N108-, see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM)
17660 P1252 Cold Start Injector -N108-
Open circuit/short to ground	-N108- inoperative Open circuit	Engine knocks at idle, cold start is "advanced" continuously	Check Cold Start Injector -N108-, see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM)
Open circuit/short to ground	Short to ground	Poor performance, start of injection is "advanced" continually

DTC 17663 P1255, 17664P1256 & 17762 P1354

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
17663 P1255 Engine Coolant Temperature (ECT) Sensor -G62-
Short to ground	-G62- inoperative Short to ground	Black smoke when starting Glow period is always approx. 20 seconds	Check Engine Coolant Temperature (ECT) sensor -G62-, see Engine Coolant Temperature (ECT) sensor G62, checking
17664 P1256 Engine Coolant Temperature (ECT) Sensor -G62-
Open circuit/short to positive (B+)	-G62- inoperative Open circuit or short to positive (B+)	Black smoke when starting Glow period is always approx. 20 seconds	Check Engine Coolant Temperature (ECT) sensor -G62-, see Engine Coolant Temperature (ECT) sensor G62, checking
17762 P1354 Modulating Piston Displacement Sensor -G149-
Electrical malfunction in circuit	Injection pump inoperative Open/short circuit	Glow Plug Indicator Lamp -K29- flashes Various running problems Engine will not start	Check Modulating Piston Displacement Sensor -G149-, see Modulating piston displacement sensor G149 and quantity adjuster N146, checking

DTC 17795 P1387, 17810 P1402 & 17811 P1403

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
17795 P1387
Engine Control Module (ECM) -J248- inoperative	ECM inoperative	Various running problems Engine will not start	Replace ECM -J248-, see Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) J248, replacing
17810 P1402 EGR Vacuum Regulator Solenoid Valve -N18-
Short to positive (B+)	Short to positive (B+)	No EGR	Check EGR Vacuum Regulator Solenoid Valve -N18-, see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM)
17811 P1403 Exhaust Gas Recirculation (EGR) system
Control difference	Unmetered air Hose connections interchanged, disconnected EGR Valve inoperative (valve sticking, diaphragm rod does not move)	Reduced power Black smoke Too little or too much EGR	Check EGR: See Exhaust Gas Recirculation (EGR) valve, checking

DTC 17849 P1441

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
17849 P1441 EGR Vacuum Regulator Solenoid Valve -N18-
Open circuit/short to ground	Open circuit -N18- inoperative	No EGR	Check EGR Vacuum Regulator Solenoid Valve -N18-, see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM)
Open circuit/short to ground	Short to ground	Too much EGR Reduced power Black smoke

DTC 17911 P1503 & 17945 P1537

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
17911 P1503 Load signal from alternator DF terminal
Implausible signal	Alternator defective Voltage regulator defective Wiring open circuit	Engine preheating not operating	Check alternator
17945 P1537 Fuel Cut-off Valve -N109-
Incorrect function	-N109- inoperative, leaking or sticking	Reduced power Engine will not start	Check Fuel Cut-off Valve -N109-, see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM)

DTC 17946 P1538 & 17948 P1540

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
17946 P1538 Fuel Cut-off Valve -N109-
Open circuit/short to ground	-N109- inoperative Open circuit/short to ground	Reduced power Engine will not start	Check Fuel Cut-off Valve -N109-, see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM)
17948 P1540 Road speed signal
Signal too high	Road speed more than 260 km/h (162 mph) Dash panel insert defective	Speedometer display inoperative Cruise control system switched off Vehicle jerks when selecting gear Air conditioner is switched off	Check signal from G22, see Speed signal, testing

DTC 17954 P1546 & 17957 P1549

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
17954 P1546 Wastegate Bypass Regulator valve -N75-
Short to positive (B+)	Short to positive (B+)	Reduced power Boost pressure too low	Check Wastegate Bypass Regulator valve -N75-, see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM)
17957 P1549 Wastegate By-pass Regulator valve -N75-
Open circuit/short to ground	Wastegate Bypass Regulator valve -N75- inoperative Open circuit	Reduced power Boost pressure too low	Check Wastegate Bypass Regulator valve -N75-, see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM)
Open circuit/short to ground	Short to ground	Reduced power Boost pressure too high

DTC 17958 P1550

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
17958 P1550 Boost pressure
Control difference	Wastegate Bypass Regulator valve -N75- inoperative Hose connections interchanged, disconnected	Reduced power	Check Wastegate Bypass Regulator valve -N75-, see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM) Check boost pressure control See Charge air system with turbocharger

DTC 17964 P1556 & 17965 P1557

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
17964 P1556 Boost pressure control
Control limit not reached	Wastegate Bypass Regulator valve -N75- inoperative Turbocharger defective Leaks between turbocharger and engine (boost air path)	Boost pressure too low Reduced output	Check Wastegate Bypass Regulator valve -N75-, see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM) Check boost pressure control See Charge air system with turbocharger
17965 P1557 Charge pressure control
Control limit exceeded	Hose connections interchanged, not attached	Charge pressure too high Reduced output

DTC 17969 P1561

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
17969 P1561 Quantity Adjuster -N146-
Control difference	Injection pump inoperative Open/short circuit	Glow Plug Indicator Lamp -K29- flashes Various running problems Engine will not start	Check Quantity Adjuster -N146-, see Modulating piston displacement sensor G149 and quantity adjuster N146, checking

DTC 17970 P1562, 17971P1563 & 17977 P1569

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
17970 P1562 Quantity adjuster -N146-
Upper stop value	Quantity adjuster -N146- inoperative/blocked Upper stop value obtained	Reduced power Jerking	Check Quantity Adjuster -N146-, see Modulating piston displacement sensor G149 and quantity adjuster N146, checking
17971 P1563 Quantity adjuster -N146-
Lower stop value	-N146- inoperative/blocked Lower stop value obtained	Black smoke Rough idle	Check Quantity Adjuster -N146-, see Modulating piston displacement sensor G149 and quantity adjuster N146, checking
17977 P1569 Cruise Control Switch -E45-
Implausible signal	Cruise Control Switch -E45- inoperative Wiring open/short circuit	Cruise control system is switched off	Check cruise control system See Cruise Control System (CCS) through m.y. 2001 or Cruise Control System (CCS) from m.y. 2002

DTC 17978 P1570

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
17978 P1570
Engine Control Module blocked	Start attempted with a non - authorized button. Attempted manipulation Short in communication wire Incorrect coding Malfunction in immobilizer system Immobilizer control module defective/missing Engine Control Module has been replaced and not matched to the immobilizer.	Engine starts briefly and then stops again Glow period warning lamp flashes	Match Engine Control Module to electronic immobilizer. Check electronic immobilizer, see DIAGNOSTIC TROUBLE CODE (DTC) MEMORY, CHECKING AND ERASING

DTC 18008 P1600

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
18008 P1600 Supply voltage terminal 15
Voltage too low	No voltage supply when ignition is on (terminal 15)	Various running problems Engine will not start	Check voltage supply of Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) -J248-, see Diesel Direct Fuel Injection (DFI) Engine Control Module

DTC 18009 P1601, 18017 P1609 & 18020 P1612

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
18009 P1601
Power Supply (Terminal 30, B+) Relay -J317-	Power Supply (Terminal 30, B+) Relay -J317- defective Relay stuck (sporadic)	Engine does not start Various running problems until engine stops	Check voltage supply of Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) -J248-, see Diesel Direct Fuel Injection (DFI) Engine Control Module
18017 P1609
Crash switch-off triggered	Airbag triggered		See appropriate Air Bag Restraint System article
18020 P1612 Engine Control Module (ECM) -J248-
incorrectly coded	Invalid ECM code	Glow Plug Indicator Lamp -K29- flashes	Code ECM -J248-, see Diesel Direct Fuel Injection (DFI) Engine Control Module

DTC 18024 P1616

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
18024 P1616 Glow Plug Indicator Lamp -K29-
Short to positive (B+)	Short to positive (B+)	Glow Plug Indicator Lamp -K29- inoperative	Check Glow Plug Indicator Lamp -K29-, see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM)

DTC 18025 P1617 & 18026 P1618

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
18025 P1617 Glow Plug Indicator Lamp -K29-
Open circuit/short to ground	Open circuit Bulb inoperative	Glow Plug Indicator Lamp -K29- inoperative	Check Glow Plug Indicator Lamp -K29-, see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM)
Open circuit/short to ground	Short to ground	Glow Plug Indicator Lamp -K29- on continuously
18026 P1618 Glow Plug Relay -J52-
Short to positive (B+)	-J52- inoperative Short to positive (B+)	No glow period Poor cold starting Glow Plug Indicator Lamp -K29- flashes	Check Glow Plug Relay -J52-, see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM)

DTC 18027 P1619

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
18027 P1619 Glow Plug Relay -J52-
Open circuit/short to ground	-J52- inoperative Open circuit/short to ground	No glow period Poor cold starting Glow Plug Indicator Lamp -K29- flashes	Check Glow Plug Relay -J52-, see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM)

DTC 18034 P1626 & 18039 P1631

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
18034 P1626 Drive train data bus
Communication from gearbox control module missing	Malfunction in Transmission Control Module -J217-	Various running problems (gear change jolts, load change jolts) TCM in emergency run mode (default)	Check CAN-Bus, see CAN-bus, checking
Communication from gearbox control module missing	Malfunction in Transmission Control Module -J217-		Check automatic transmission control module (TCM) See 4 SPD. AUTOMATIC TRANSMISSION 01M ON BOARD DIAGNOSTIC (OBD) (A4 PLATFORM)
18039 P1631 Throttle Position (TP) Sensor -G79-
Signal too high	-G79- malfunction	Glow Plug Indicator Lamp -K29- flashes Increased idle speed	Check Throttle Position Sensor -G79- See Throttle Position (TP) sensor, checking

DTC 18040 P1632 & 18044 P1636

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
18040 P1632 Throttle Position (TP) Sensor -G79-
Supply voltage	Voltage too high or too low Open circuit	Glow Plug Indicator Lamp -K29- flashes Increased idle speed	Check Throttle Position Sensor -G79- See Throttle Position (TP) sensor, checking
18044 P1636 Drive train CAN -bus
No message from airbag control module	Malfunction in data wire to airbag control module	Checking matching resistor of CAN-bus, see CAN-bus, checking Check Airbag system: See appropriate Air Bag Restraint System article

DTC 18047 P1639, 18048 P1640 & 18050 P1642

DTC

VAG 1551 display

Possible causes

Possible effects

Corrective action

18047 P1639
Throttle Position (TP) Sensor 1/2 -G79- + sensor 2 -G185- ⁽¹⁾

Implausible signal

-G79- inoperative

Increased idle speed

Check Throttle Position Sensor -G79-
See

18048 P1640

Engine Control Module (ECM) -J248- inoperative

ECM -J248- malfunction

Various running problems
Engine will not start

Replace ECM -J248-, see Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) J248, replacing

18050 P1642

Check airbag control module DTC memory

Malfunction in airbag system

Airbag warning lamp lights up

See

⁽¹⁾	Incorrect fault text display. Display must indicate: Accelerator pedal position sender -G79 implausible signal

DTC 18056 P1648 & 18057 P1649

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
18056 P1648 Drive train CAN -Bus
System component inoperative	Malfunction in CAN -Bus circuit to transmission or ABS Control Module -J104-	Various running problems (gear change jolts, load change jolts) No electronic control	Check CAN-Bus, see CAN-bus, checking
18057 P1649 Drive train CAN -Bus
Implausible signal from ABS Control Module -J104-	Malfunction in CAN -Bus circuit to ABS Control Module -J104-	No electronic control	Check CAN-Bus, see CAN-bus, checking
Implausible signal from ABS Control Module -J104-	Malfunction in system (disconnected Control Module for ABS, ABS incorrectly coded)	No electronic control	Check ABS control module See 01 On Board Diagnostic (OBD)

DTC 18058 P1650, 18061P1653 & 18062 P1654

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
18058 P1650 Drive train CAN -bus
No message from instrument cluster	Malfunction in data wire to instrument cluster	Check CAN-Bus, see CAN-bus, checking
18061 P1653
Check DTC memory of the ABS control module	Malfunction in ABS control module	No electronic stability program No TCS function No EBC function	See 01 On Board Diagnostic (OBD)
18062 P1654
Interrogate combi-instrument fault memory	Oil level/temperature sender defective	Oil level warning lamp lights up	See On Board Diagnostic (OBD), function

DTC 18065 P1657 & 18090 P1682

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
18065 P1657 Air conditioner input/output
Short to positive (B+)	Short in the wiring	Vehicle acceleration reduced, when air conditioner is switched on	Check air conditioner compressor cut-in, see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM)
18090 P1682 Drive train CAN -bus
Implausible message from ABS control module	Malfunction in data wiring to ABS control module	No electronic stability control No TCS function No EBC function	Checking matching resistor of CAN-bus, see CAN-bus, checking

DTC 19456 P3000 & 19458 P3002

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
19456 P3000 Glow period warning lamp -K29-
Malfunction message from instrument cluster	Malfunction in CAN-bus wire to instrument cluster		Check matching resistor of CAN -bus, see CAN-bus, checking
19458 P3002 Kick down switch -F8-
Implausible signal	-G79- inoperative	Automatic transmission shift points inaccurate	Check Throttle Position Sensor -G79- See Throttle Position (TP) sensor, checking

DTC 19459 P3003 & 19461 P3005

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
19459 P3003 Low heat output relay -J359-
Short to positive (B+)	Wiring open circuit Short to positive (B+) Low heat output relay - J359- inoperative	Engine preheating not functioning	Check -J359-, see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM)
19461 P3005 High heat output relay -J360-
Short to positive (B+)	Wiring open circuit Short to positive (B+) High heat output relay -J360- inoperative	Engine preheating not functioning	Check -J360-, see FUNCTION 03: OUTPUT DIAGNOSTIC TEST MODE (DTM)

DTC 19560 P3104 & 19561 P3105

DTC
VAG 1551 display	Possible causes	Possible effects	Corrective action
19560 P3104 Intake manifold flap change -over valve -N239-
Short to positive (B+)	Short to positive (B+)	Harder engine stop jolts	Check -N239-, see CAN-bus, checking
19561 P3105 Intake manifold flap change -over valve -N239-
Open circuit/short to ground	Wiring open circuit Intake manifold change -over valve inoperative	Harder engine stop jolts	Check -N239-, see CAN-bus, checking

Safety Warning

DTC table: VAG codes

Use the Manual With the Right Hardware

When to See a Mechanic