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.
1998 Audi CabrioletFACTORY OEM SERVICE PROCEDURE
Diagnostic Trouble Code Identification
NOTE:
Vehicle manufacturer does not support diagnostic information using aftermarket scan tools. Limited diagnostic information is available.
DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| 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 | ||||||||||
| 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 | ||||||||||
| P0120 (1) | (1) 16504 | TP Sensor Circuit Malfunction | ||||||||||
| 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) | ||||||||||
| 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) | ||||||||||
| P0135 (1) | (1) 16519 | HO2S Heater Circuit Malfunction (Bank 1, Sensor 1) | ||||||||||
| P0136 (1) | (1) 16520 | HO2S Circuit Malfunction (Bank 1, Sensor 2) | ||||||||||
| P0138 (1) | (1) 16522 | HO2S Circuit High Voltage (Bank 1, Sensor 2) | ||||||||||
| P0141 (1) | (1) 16525 | HO2S Heater Circuit Malfunction (Bank 1, Sensor 2) | ||||||||||
| P0150 (1) | (1) 16534 | HO2S Circuit Malfunction (Bank 2, Sensor 1) | ||||||||||
| P0152 (1) | (1) 16536 | HO2S Circuit High Voltage (Bank 2, Sensor 1) | ||||||||||
| P0153 (2) | (2) 16537 | HO2S Circuit Slow Response (Bank 2, Sensor 1) | ||||||||||
| P0154 (1) | (1) 16538 | HO2S Circuit No Activity Detected (Bank 2, Sensor 1) | ||||||||||
| P0155 (1) | (1) 16539 | HO2S Heater Circuit Malfunction (Bank 2, Sensor 1) | ||||||||||
| P0156 (1) | (1) 16540 | HO2S Circuit Malfunction (Bank 2, Sensor 2) | ||||||||||
| P0158 (1) | (1) 16542 | HO2S Circuit High Voltage (Bank 2, Sensor 2) | ||||||||||
| P0161 (1) | (1) 16545 | HO2S Heater Circuit Malfunction (Bank 2, Sensor 2) | ||||||||||
| P0170 (2) | (2) 16554 | Fuel Trim Malfunction (Bank 1) | ||||||||||
| P0171 (2) | (2) 16555 | Fuel Trim, System Too Lean (Bank 1) | ||||||||||
| P0172 (2) | (2) 16556 | Fuel Trim, System Too Rich (Bank 1) | ||||||||||
| P0173 (2) | (2) 16557 | Fuel Trim Malfunction (Bank 2) | ||||||||||
| P0174 (2) | (2) 16558 | Fuel Trim, System Too Lean (Bank 2) | ||||||||||
| P0175 (2) | (2) 16559 | Fuel Trim, System Too Rich (Bank 2) | ||||||||||
| P0300 (3) | (3) 16684 | Random/Multiple Misfire Detected | ||||||||||
| P0301 (3) | (3) 16685 | Cylinder No. 1 Misfire Detected | ||||||||||
| P0302 (3) | (3) 16686 | Cylinder No. 2 Misfire Detected | ||||||||||
| P0303 (3) | (3) 16687 | Cylinder No. 3 Misfire Detected | ||||||||||
| P0304 (3) | (3) 16688 | Cylinder No. 4 Misfire Detected | ||||||||||
| P0305 (3) | (3) 16689 | Cylinder No. 5 Misfire Detected | ||||||||||
| P0306 (3) | (3) 16690 | Cylinder No. 6 Misfire Detected | ||||||||||
| P0322 (1) | (1) 16706 | Ignition Engine Speed Input Circuit No Signal | ||||||||||
| P0327 (1) | (1) 16711 | Knock Sensor No. 1 Circuit Low Input | ||||||||||
| P0332 (1) | (1) 16716 | Knock Sensor No. 2 Circuit Low Input | ||||||||||
| P0337 (1) | (1) 16721 | Crankshaft Position Sensor Circuit Low Input | ||||||||||
| P0401 (2) | (2) 16785 | EGR Flow Insufficient Detected | ||||||||||
| P0402 (2) | (2) 16786 | EGR Flow Excessive Detected | ||||||||||
| P0422 (2) | (2) 16806 | Main Catalyst Efficiency Below Threshold (Bank 1) | ||||||||||
| P0432 (2) | (2) 16816 | Main Catalyst Efficiency Below Threshold (Bank 2) | ||||||||||
| P0440 (2) | (2) 16824 | EVAP System Malfunction | ||||||||||
| P0452 (1) | (1) 16836 | EVAP System Pressure Sensor Low Input | ||||||||||
| P0453 (1) | (1) 16837 | EVAP System Pressure Sensor High Input | ||||||||||
| P0501 (1) | (1) 16885 | Vehicle Speed Sensor Range/Performance | ||||||||||
| P0603 (4) | (4) 65535 | PCM Keep Alive Memory (KAM) Error | ||||||||||
| P0605 (1) | (1) 16989 | PCM Read Only Memory (ROM) Error | ||||||||||
| P0605 (4) | (4) 65535 | PCM Malfunction | ||||||||||
| P0706 (4) | (4) 17090 | Transmission Range Sensor Circuit Malfunction | ||||||||||
| P0707 (5) | (5) 17091 | Transmission Range Sensor Circuit Low Input | ||||||||||
| P0715 (4) | (4) 00297 | Input/Turbine Speed Sensor Circuit Malfunction | ||||||||||
| P0721 (4) | (4) 00297 | Output Speed Sensor Circuit Range/Performance | ||||||||||
| P0722 (4) | (4) 00297 | Output Speed Sensor Circuit No Signal | ||||||||||
| P0725 (4) | (4) 00529 | Engine Speed Input Circuit Malfunction | ||||||||||
| P0726 (4) | (4) 00543 | Engine Speed Input Circuit Range/Performance | ||||||||||
| P0727 (4) | (4) 00529 | Engine Speed Input Circuit No Signal | ||||||||||
| P0730 (4) | (4) 00652 | Incorrect Gear Ratio | ||||||||||
| P0731 (4) | (4) 00652 | Gear 1 Incorrect Ratio | ||||||||||
| P0732 (4) | (4) 00652 | Gear 2 Incorrect Ratio | ||||||||||
| P0733 (4) | (4) 00652 | Gear 3 Incorrect Ratio | ||||||||||
| P0734 (4) | (4) 00652 | Gear 4 Incorrect Ratio | ||||||||||
| P0748 (4) | (4) 00268 | Pressure Control Solenoid Electrical | ||||||||||
| P0753 (4) | (4) 00258 | Shift Solenoid A Electrical | ||||||||||
| P0758 (4) | (4) 00260 | Shift Solenoid B Electrical | ||||||||||
| P0763 (4) | (4) 00262 | Shift Solenoid C Electrical | ||||||||||
| P0768 (4) | (4) 00264 | Shift Solenoid D Electrical | ||||||||||
| P0773 (4) | (4) 00266 | Shift Solenoid E Electrical | ||||||||||
| P1101 (1) | (1) 17509 | HO2S Voltage Too Low/Air Leak (Bank 1, Sensor 1) | ||||||||||
| P1102 (1) | (1) 17510 | HO2S Heater Circuit Short to B+ (Bank 1, Sensor 1) | ||||||||||
| P1104 (1) | (1) 17512 | HO2S Voltage Too Low/Air Leak (Bank 1, Sensor 2) | ||||||||||
| P1105 (1) | (1) 17513 | HO2S Heater Circuit Short To B+ (Bank 1, Sensor 2) | ||||||||||
| P1106 (1) | (1) 17514 | HO2S Voltage Too Low/Air Leak (Bank 2, Sensor 1) | ||||||||||
| P1107 (1) | (1) 17515 | HO2S Heater Circuit Short To B+ (Bank 2, Sensor 1) | ||||||||||
| P1109 (1) | (1) 17517 | HO2S Voltage Too Low/Air Leak (Bank 2, Sensor 2) | ||||||||||
| P1110 (1) | (1) 17518 | HO2S Heater Circuit Short To B+ (Bank 2, Sensor 2) | ||||||||||
| P1201 (1) | (1) 17609 | Cylinder No. 1 Fuel Injector Circuit Electrical Malfunction | ||||||||||
| P1202 (1) | (1) 17610 | Cylinder No. 2 Fuel Injector Circuit Electrical Malfunction | ||||||||||
| P1203 (1) | (1) 17611 | Cylinder No. 3 Fuel Injector Circuit Electrical Malfunction | ||||||||||
| P1204 (1) | (1) 17612 | Cylinder No. 4 Fuel Injector Circuit Electrical Malfunction | ||||||||||
| P1205 (1) | (1) 17613 | Cylinder No. 5 Fuel Injector Circuit Electrical Malfunction | ||||||||||
| P1206 (1) | (1) 17614 | Cylinder No. 6 Fuel Injector Circuit Electrical Malfunction | ||||||||||
| P1213 (1) | (1) 17621 | Cylinder No. 1 Fuel Injector Circuit Short To B+ |
||||||||||
| P1214 (1) | (1) 17622 | Cylinder No. 2 Fuel Injector Circuit Short To B+ | ||||||||||
| P1215 (1) | (1) 17623 | Cylinder No. 3 Fuel Injector Circuit Short To B+ | ||||||||||
| P1216 (1) | (1) 17624 | Cylinder No. 4 Fuel Injector Circuit Short To B+ | ||||||||||
| P1217 (1) | (1) 17625 | Cylinder No. 5 Fuel Injector Circuit Short To B+ | ||||||||||
| P1218 (1) | (1) 17626 | Cylinder No. 6 Fuel Injector Circuit Short To B+ | ||||||||||
| P1250 (5) | (5) 17658 | Fuel Level Too Low | ||||||||||
| P1325 (5) | (5) 17733 | Cylinder No. 1 Knock Control Limit Attained | ||||||||||
| P1326 (5) | (5) 17734 | Cylinder No. 2 Knock Control Limit Attained | ||||||||||
| P1327 (5) | (5) 17735 | Cylinder No. 3 Knock Control Limit Attained | ||||||||||
| P1328 (5) | (5) 17736 | Cylinder No. 4 Knock Control Limit Attained | ||||||||||
| P1329 (5) | (5) 17737 | Cylinder No. 5 Knock Control Limit Attained | ||||||||||
| P1330 (5) | (5) 17738 | Cylinder No. 6 Knock Control Limit Attained | ||||||||||
| P1339 (1) | (1) 17747 | Crankshaft Position Sensor/Engine Speed Sensor Cross Connected | ||||||||||
| P1340 (1) | (1) 17747 | Crankshaft Position Sensor Signals Out Of Sequence | ||||||||||
| P1341 (1) | (1) 17749 | Ignition Coil Power Output Stage 1 Short To Ground | ||||||||||
| P1343 (1) | (1) 17751 | Ignition Coil Power Output Stage 2 Short To Ground | ||||||||||
| P1345 (1) | (1) 17753 | Ignition Coil Power Output Stage 3 Short To Ground | ||||||||||
| P1391 (1) | (1) 17799 | Camshaft Position (CMP) Sensor Short To Ground (Bank 2) | ||||||||||
| P1392 (1) | (1) 17800 | Camshaft Position (CMP) Sensor Open Circuit Or Short To B+ (Bank 2) | ||||||||||
| P1393 (1) | (1) 17801 | Ignition Coil Power Output Stage 1 Electrical Malfunction | ||||||||||
| P1394 (1) | (1) 17802 | Ignition Coil Power Output Stage 2 Electrical Malfunction | ||||||||||
| P1395 (1) | (1) 17803 | Ignition Coil Power Output Stage 3 Electrical Malfunction | ||||||||||
| P1396 (1) | (1) 17804 | Engine Speed Sensor Missing Tooth | ||||||||||
| P1400 (1) | (1) 17808 | EGR Valve Circuit Electrical Malfunction | ||||||||||
| P1402 (1) | (1) 17810 | EGR Valve Circuit Short To B+ | ||||||||||
| P1407 (1) | (1) 17815 | EGR Temperature Sensor Signal Too Low | ||||||||||
| P1408 (1) | (1) 17816 | EGR Temperature Sensor Signal Too High | ||||||||||
| P1409 (1) | (1) 17817 | Fuel Tank Ventilation Valve Circuit Electrical Malfunction | ||||||||||
| P1410 (1) | (1) 17818 | Fuel Tank Ventilation Valve Circuit Short To B+ | ||||||||||
| P1417 (5) | (5) 17825 | Fuel Level Sensor Signal Too Low | ||||||||||
| P1418 (5) | (5) 17826 | Fuel Level Sensor Signal Too High | ||||||||||
| P1500 (1) | (1) 17908 | Fuel Pump Relay Circuit Electrical Malfunction | ||||||||||
| P1504 (1) | (1) 17912 | Intake Air System By-pass Leak Detected | ||||||||||
| P1505 (1) | (1) 17913 | CTP Switch Does Not Close (Open Circuit) | ||||||||||
| P1506 (1) | (1) 17914 | CTP Switch Does Not Open (Short To Ground) | ||||||||||
| P1509 (1) | (1) 17917 | IAC Circuit Electrical Malfunction | ||||||||||
| P1510 (1) | (1) 17918 | IAC Circuit Short To B+ | ||||||||||
| P1511 (5) | (5) 17919 | Intake Manifold Change-Over Valve Circuit Electrical Malfunction |
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| P1512 (5) | (5) 17920 | Intake Manifold Change-Over Valve Circuit Short To B+ | ||||||||||
| P1600 (5) | (5) 18008 | Power Supply (B+) Terminal 15 Low Voltage | ||||||||||
| P1602 (1) | (1) 18010 | Power Supply (B+) Terminal 30 Low Voltage | ||||||||||
| P1606 (5) | (5) 18014 | Rough Road Specification Engine Torque ABS/PCM Electrical Malfunction | ||||||||||
| P1611 (1) | (1) 18019 | MIL Call-Up/TCM Short To Ground | ||||||||||
| P1612 (1) | (1) 18020 | PCM Incorrectly Coded | ||||||||||
| P1613 (1) | (1) 18021 | MIL Call-Up Circuit Open Or Short To B+ | ||||||||||
| P1711 (4) | (4) 00283 | Wheel Speed Signal No. 1 Range/Performance | ||||||||||
| P1716 (4) | (4) 00285 | Wheel Speed Signal No. 2 Range/Performance | ||||||||||
| P1726 (4) | (4) 00290 | Wheel Speed Signal No. 4 Range/Performance | ||||||||||
| P1728 (4) | (4) 00597 | Different Wheel Speed Signals Range/Performance | ||||||||||
| P1746 (4) | (4) 00532 | Transmission Control Module Relay Malfunction | ||||||||||
| P1749 (4) | (4) 01044 | Transmission Control Module Relay Malfunction | ||||||||||
| P1766 (4) | (4) 00638 | Throttle Angle Signal Stuck Off | ||||||||||
| P1767 (4) | (4) 00638 | Throttle Angle Signal Stuck On | ||||||||||
| P1778 (4) | (4) 00270 | Solenoid EV7 Electrical Malfunction | ||||||||||
| P1780 (4) | (4) 00545 | Engine Intervention Readable | ||||||||||
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Factory Service Tools
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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.
