Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSAUDI1998A4 AVANT QUATTRO, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSDTC INDEXENGINE CONTROLS DTCS (1.8L TURBO)

1998 Audi A4 Avant Quattro, Automatic

Engine Controls DTCS (1.8L Turbo)

1998 Audi A4 Avant Quattro, AutomaticSECTION Engine Controls DTCS (1.8L Turbo)

ENGINE CONTROLS DTCS (1.8L TURBO)

Generic Scan Tool Code

VAG 1551 Code

Malfunction/Affected Sensor Or Circuit

P0102 ⁽¹⁾

⁽¹⁾ 16486

MAF Circuit Low Input

P0103 ⁽¹⁾

⁽¹⁾ 16487

MAF Circuit High Input

P0107 ⁽¹⁾

⁽¹⁾ 16491

MAP Or Barometric Pressure Low Input

P0108 ⁽¹⁾

⁽¹⁾ 16491

MAP Or Barometric Pressure High Input

P0112 ⁽¹⁾

⁽¹⁾ 16496

Intake Air Temp Circuit Low Input

P0113 ⁽¹⁾

⁽¹⁾ 16497

Intake Air Temp Circuit High Input

P0116 ⁽¹⁾

⁽¹⁾ 16500

ECT Circuit Range/Performance Problem

P0117 ⁽¹⁾

⁽¹⁾ 16501

ECT Circuit Low Input

P0118 ⁽¹⁾

⁽¹⁾ 16502

ECT Circuit High Input

P0121 ⁽¹⁾

⁽¹⁾ 16505

TP Sensor Circuit Range/Performance Problem

P0122 ⁽¹⁾

⁽¹⁾ 16506

TP Sensor Circuit Low Input

P0123 ⁽¹⁾

⁽¹⁾ 16507

TP Sensor Circuit High Input

P0130 ⁽¹⁾

⁽¹⁾ 16514

HO2S Circuit Malfunction (Bank 1, Sensor 1)

P0131 ⁽¹⁾

⁽¹⁾ 16515

HO2S Circuit Low Voltage (Bank 1, Sensor 1)

P0132 ⁽¹⁾

⁽¹⁾ 16516

HO2S Circuit High Voltage (Bank 1, Sensor 1)

P0133 ⁽²⁾

⁽²⁾ 16517

HO2S Circuit Slow Response (Bank 1, Sensor 1)

P0134 ⁽¹⁾

⁽¹⁾ 16518

HO2S Circuit No Activity Detected (Bank 1, Sensor 1)

P0136 ⁽¹⁾

⁽¹⁾ 16520

HO2S Circuit Malfunction (Bank 1, Sensor 2)

P0137 ⁽¹⁾

⁽¹⁾ 16521

HO2S Circuit Low Voltage (Bank 1, Sensor 2)

P0138 ⁽¹⁾

⁽¹⁾ 16522

HO2S Circuit High Voltage (Bank 1, Sensor 2)

P0140 ⁽¹⁾

⁽¹⁾ 16524

HO2S Circuit No Activity Detected (Bank 1, Sensor 2)

P0300 ⁽²⁾

⁽²⁾ 16684

Random/Multiple Cylinder Misfire Detected

P0301 ⁽²⁾

⁽²⁾ 16685

Cylinder No. 1 Misfire Detected

P0302 ⁽²⁾

⁽²⁾ 16686

Cylinder No. 2 Misfire Detected

P0303 ⁽²⁾

⁽²⁾ 16687

Cylinder No. 3 Misfire Detected

P0304 ⁽²⁾

⁽²⁾ 16688

Cylinder No. 4 Misfire Detected

P0321 ⁽¹⁾

⁽¹⁾ 16705

Ignition/Distributor Engine Speed Input Circuit Range/Performance

P0322 ⁽³⁾

⁽³⁾ 16706

Ignition/Distributor Engine Speed Input Circuit No Signal

P0327 ⁽³⁾

⁽³⁾ 16711

Knock Sensor No. 1 Circuit Low Input

P0332 ⁽³⁾

⁽³⁾ 16716

Knock Sensor No. 2 Circuit Low Input

P0422 ⁽¹⁾

⁽¹⁾ 16806

Main Catalyst Efficiency Below Threshold (Bank 1)

P0441 ⁽¹⁾

⁽¹⁾ 16825

EVAP System Incorrect Purge Flow

P0442 ⁽⁵⁾

⁽⁵⁾ 16826

EVAP System Small Leak Detected

P0455 ⁽⁵⁾

⁽⁵⁾ 16839

EVAP System Gross Leak Detected

P0501 ⁽¹⁾

⁽¹⁾ 16885

Vehicle Speed Sensor Range/Performance

P0506 ⁽¹⁾

⁽¹⁾ 16890

Idle Control System RPM Lower Than Expected

P0507 ⁽¹⁾

⁽¹⁾ 16891

Idle Control System RPM Higher Than Expected

P0560 ⁽¹⁾

⁽¹⁾ 16944

System Voltage Malfunction

P0562 ⁽¹⁾

⁽¹⁾ 16946

System Voltage Low

P0563 ⁽¹⁾

⁽¹⁾ 16947

System Voltage High

P0601 ⁽¹⁾

⁽¹⁾ 16895

PCM Memory Check Sum Error

P0604 ⁽¹⁾

⁽¹⁾ 16988

PCM Random Access Memory (RAM) Error

P0707 ⁽⁴⁾

⁽⁴⁾ 17091

Transmission Range Sensor Circuit Low Input

P0708 ⁽⁴⁾

⁽⁴⁾ 17092

Transmission Range Sensor Circuit High Input

P1102 ⁽¹⁾

⁽¹⁾ 17510

HO2S Heater Circuit Short to B+ (Bank 1, Sensor 1)

P1105 ⁽¹⁾

⁽¹⁾ 17513

HO2S Heater Circuit Short to B+ (Bank 1, Sensor 2)

P1127 ⁽¹⁾

⁽¹⁾ 17535

Long Term Fuel Trim (Multiplicative) Too Rich (Bank 1)

P1128 ⁽¹⁾

⁽¹⁾ 17536

Long Term Fuel Trim (Multiplicative) Too Lean (Bank 1)

P1136 ⁽¹⁾

⁽¹⁾ 17544

Long Term Fuel Trim (Additive) Too Lean (Bank 1)

P1137 ⁽¹⁾

⁽¹⁾ 17545

Long Term Fuel Trim (Additive) Too Rich (Bank 1)

P1176 ⁽¹⁾

⁽¹⁾ 17584

HO2S Correction Behind Catalyst Limit Attained (Bank 1)

P1196 ⁽¹⁾

⁽¹⁾ 17604

HO2S Heater Electrical Malfunction (Bank 1, Sensor 1)

P1198 ⁽¹⁾

⁽¹⁾ 17606

HO2S Heater Electrical Malfunction (Bank 1, Sensor 2)

P1213 ⁽³⁾

⁽³⁾ 17621

Cylinder No. 1 Fuel Injector Circuit Short To B+

P1214 ⁽³⁾

⁽³⁾ 17622

Cylinder No. 2 Fuel Injector Circuit Short To B+

P1215 ⁽³⁾

⁽³⁾ 17623

Cylinder No. 3 Fuel Injector Circuit Short To B+

P1216 ⁽³⁾

⁽³⁾ 17624

Cylinder No. 4 Fuel Injector Circuit Short To B+

P1225

⁽³⁾ 17633

Cylinder No. 1 Fuel Injector Circuit Short To Ground

P1226 ⁽³⁾

⁽³⁾ 17634

Cylinder No. 2 Fuel Injector Circuit Short To Ground

P1227 ⁽³⁾

⁽³⁾ 17635

Cylinder No. 3 Fuel Injector Circuit Short To Ground

P1228 ⁽³⁾

⁽³⁾ 17636

Cylinder No. 4 Fuel Injector Circuit Short To Ground

P1237 ⁽³⁾

⁽³⁾ 17645

Cylinder No. 1 Fuel Injector Open Circuit

P1238 ⁽³⁾

⁽³⁾ 17646

Cylinder No. 2 Fuel Injector Open Circuit

P1239 ⁽³⁾

⁽³⁾ 17647

Cylinder No. 3 Fuel Injector Open Circuit

P1240 ⁽³⁾

⁽³⁾ 17648

Cylinder No. 4 Fuel Injector Open Circuit

P1250 ⁽⁴⁾

⁽⁴⁾ 17658

Fuel Level Too Low

P1325 ⁽⁴⁾

⁽⁴⁾ 17733

Cylinder No. 1 Knock Control Limit Attained

P1326 ⁽⁴⁾

⁽⁴⁾ 17734

Cylinder No. 2 Knock Control Limit Attained

P1327 ⁽⁴⁾

⁽⁴⁾ 17735

Cylinder No. 3 Knock Control Limit Attained

P1328 ⁽⁴⁾

⁽⁴⁾ 17736

Cylinder No. 4 Knock Control Limit Attained

P1337 ⁽¹⁾

⁽¹⁾ 17745

Camshaft Position Sensor Short To Ground (Bank 1)

P1338 ⁽¹⁾

⁽¹⁾ 17746

Camshaft Position Sensor Open Circuit Or Short To B+ (Bank 1)

P1386 ⁽⁴⁾

⁽⁴⁾ 17794

PCM Knock Control Circuit Error

P1410 ⁽¹⁾

⁽¹⁾ 17818

Fuel Tank Ventilation Valve Circuit Short To B+

P1425 ⁽¹⁾

⁽¹⁾ 17833

Fuel Tank Ventilation Valve Short To Ground

P1426 ⁽¹⁾

⁽¹⁾ 17834

Fuel Tank Ventilation Valve Open

P1471 ⁽⁵⁾

⁽⁵⁾ 17879

EVAP Leak Detection Pump Short To B+

P1472 ⁽⁵⁾

⁽⁵⁾ 17880

EVAP Leak Detection Pump Short To Ground

P1473 ⁽⁵⁾

⁽⁵⁾ 17881

EVAP Leak Detection Pump Open Circuit

P1475 ⁽⁵⁾

⁽⁵⁾ 17883

EVAP Leak Detection Pump Malfunction/Signal Circuit Open

P1476 ⁽⁵⁾

⁽⁵⁾ 17884

EVAP Leak Detection Pump Malfunction/Insufficient Vacuum

P1477 ⁽⁵⁾

⁽⁵⁾ 17885

EVAP Leak Detection Pump Malfunction

P1500 ⁽³⁾

⁽³⁾ 17908

Fuel Pump Relay Circuit Electrical Malfunction

P1501 ⁽³⁾

⁽³⁾ 17909

Fuel Pump Relay Circuit Short To Ground

P1502 ⁽³⁾

⁽³⁾ 17910

Fuel Pump Relay Circuit Short To B+

P1505 ⁽¹⁾

⁽¹⁾ 17913

CTP Switch Does Not Close (Open Circuit)

P1506 ⁽¹⁾

⁽¹⁾ 17914

CTP Switch Does Not Open (Short To Ground)

P1543 ⁽³⁾

⁽³⁾ 17951

Throttle Actuation Potentiometer Signal Too Low

P1544 ⁽³⁾

⁽³⁾ 17952

Throttle Actuation Potentiometer Signal Too High

P1545 ⁽¹⁾

⁽¹⁾ 17953

Throttle Position Control Malfunction

P1546 ⁽⁴⁾

⁽⁴⁾ 17954

Boost Pressure Control Valve Short To B+

P1547 ⁽⁴⁾

⁽⁴⁾ 17955

Boost Pressure Control Valve Short To Ground

P1548 ⁽⁴⁾

⁽⁴⁾ 17956

Boost Pressure Control Valve Open

P1555 ⁽⁴⁾

⁽⁴⁾ 17963

Charge Pressure Upper Limit Exceeded

P1556 ⁽⁴⁾

⁽⁴⁾ 17964

Charge Pressure Negative Deviation

P1557 ⁽⁴⁾

⁽⁴⁾ 17965

Charge Pressure Positive Deviation

P1558 ⁽¹⁾

⁽¹⁾ 17966

Throttle Actuator Electrical Malfunction

P1559 ⁽⁴⁾

⁽⁴⁾ 17967

Idle Speed Control/Throttle Position Adaptation Malfunction

P1560 ⁽⁴⁾

⁽⁴⁾ 17968

Maximum Engine Speed Exceeded

P1564 ⁽⁴⁾

⁽⁴⁾ 17972

Idle Speed Contr./Throttle Pos. Low Voltage During Adaptation

P1565 ⁽¹⁾

⁽¹⁾ 17973

Throttle Valve Control Module, Lower Stop Not Attained

P1602 ⁽⁴⁾

⁽⁴⁾ 18010

Power Supply (B+) Terminal 30 Low Voltage

P1606 ⁽⁴⁾

⁽⁴⁾ 18014

Rough Road Specification Engine Torque ABS-ECU Electrical Malfunction

P1611 ⁽¹⁾

⁽¹⁾ 18019

MIL Call-Up Circuit/TCM Short To Ground

P1612 ⁽⁴⁾

⁽⁴⁾ 18020

PCM Incorrect Coding

P1613 ⁽¹⁾

⁽¹⁾ 18021

MIL Call-Up Circuit Open Or Short To B+

P1624 ⁽³⁾

⁽³⁾ 18032

MIL Request Active

P1640 ⁽¹⁾

⁽¹⁾ 18048

Internal PCM (EEPROM) Error

P1681 ⁽³⁾

⁽³⁾ 18089

PCM PROGRAMMING NOT FINISHED

⁽¹⁾	MIL is switched on after 2 trips.

⁽²⁾	MIL is switched on after 2 trips or will blink.

⁽³⁾	MIL is switched on immediately.

⁽⁴⁾	MIL is not switched on.

⁽⁵⁾	MIL display will vary depending on vehicle production date. Model year 1996-97, MIL is not switched on. Model year 1998, MIL is switched on after 2 trips.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.