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 DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 1 (ENGINE CONTROLS - TESTS W/CODES - TESTS (1.8L TURBO))
1998 Audi A4 Avant Quattro, Automatic
Section 1 (Engine Controls - Tests W/Codes - Tests (1.8L Turbo))
1998 Audi A4 Avant Quattro, AutomaticSECTION Section 1 (Engine Controls - Tests W/Codes - Tests (1.8L Turbo))
WARNING: This page is about a different variant/trim than selected.
- Introduction
- Diagnostic Trouble Code Identification
- Summary
- Connector Identification
- Diagnostic Tests
- Notes
- DTC P0102/16486 & P0103/16487 - MAF Circuit Failure
- DTC P0107/16491 & P0108/16492 - Map Sensor Circuit Failure
- DTC P0112/16496 & P0113/16497 - IAT Sensor Circuit Failure
- DTC P0116/16500, P0117/16501 & P0118/16502 - ECT Sensor Circuit Failure
- DTC P0121/16505, P0122/16506 & P0123/16507 - TP Sensor Circuit Failure
- DTC P0130/16514, P0131/16515 & P0132/16516 - Ho2S Circuit Failure (Bank 1, Sensor 1)
- DTC P0133/16517 - Ho2S Slow Response (Bank 1, Sensor 1)
- DTC P0134/16518 - Ho2S No Activity Detected (Bank 1, Sensor 1)
- DTC P0136/16520, P0176/16521, P0138/16522 & P0140/16524 - Ho2S Circuit Failure (Bank 1, Sensor 2)
- DTC P0300/16684, P0301/16685, P0302/16686, P0303/16687 & P0304/16688 - Cylinder Misfire Detected
- DTC P0321/16705 & P0322/16706 - IGN/Dist. Circuit Failure
- DTC P0327/16711 & P0332/16716 - Knock Sensor Circuit Failure
- DTC P0422/16806 - Main Catalyst Failure (Bank 1)
- DTC P0441/16825 - EVAP System Failure
- DTC P0442/16826 & P0455/16839 - EVAP System Failure
- DTC P0501/16885 - Vehicle Speed Sensor Failure
- DTC P0506/16890 & P0507/16891 - Idle Control System Failure
- DTC P0560/16944, P0562/16946 & P0563/16947 - System Voltage Failure
- DTC P0601/16985 & P0604/16988 - Pcm Failure
- DTC P1102/17510 - Ho2S Heating Circuit Short To B+ (Bank 1, Sensor 1)
- DTC P1105/17513 - Ho2S Heating Circuit Short To B+ (Bank 1, Sensor 2)
- DTC P1127/17535 - Long Term Fuel Trim Multiplicative System Too Rich (Bank 1)
- DTC P1128/17536 - Long Term Fuel Trim Multiplicative System Too Lean (Bank 1)
- DTC P1136/17544 - Long Term Fuel Trim Additive System Too Lean (Bank 1)
- DTC P1137/17545 - Long Term Fuel Trim Additive System Too Rich (Bank 1)
- DTC P1176/17584 - Ho2S Correction Behind Catalyst Limit Attained (Bank 1)
- DTC P1196/17604 - Ho2S Heater Circuit Electrical Failure (Bank 1, Sensor 1)
- DTC P1198/17606 - Ho2S Heater Circuit Electrical Failure (Bank 1, Sensor 2)
- DTC P1213-16/17621-24 - Cylinder No. 1-4 Fuel Injector Circuit Short To B+
- DTC P1225-28/17633-36 - Cylinder No. 1-4 Fuel Injector Circuit Short To Ground
- DTC P1237-40/17645-48 - Cylinder No. 1-4 Fuel Injector Open Circuit
- DTC P1250/17658 - Fuel Level Too Low
- DTC P1325-28/17733-36 - Cylinder No. 1-4 Knock Control Limit Attained
- DTC P1337/17745 & P1338/17746 - Camshaft Position Sensor Failure
- DTC P1386/17794 - Pcm Knock Control Circuit Error
- DTC P1410/17818 - Tank Ventilation Valve Circuit Short To B+
- DTC P1425/17833 & P1426/17834 - Tank Ventilation Valve Failure
- DTC P1471-73/17879-81 & P1475-76/17883-85 - EVAP Emission Leak Detection Pump Failure
- DTC P1500-02/17908-10 - Fuel Pump Relay Circuit Failure
- DTC P1505/17913 & P1506/17914 - Closed TP Sensor Switch Failure
- DTC P1543-45/17951-53 - TP Sensor Failure
- DTC P1546-48/17954-56 - Boost Pressure Control Valve Failure
- DTC P1555-57/17963-65 - Charge Pressure Deviation
- DTC P1558/17966 & P1559/17967 - Throttle Actuator/Position Sensor Failure
- DTC P1560/17968 - Maximum Engine Speed Exceeded
- DTC P1564/17972 - Idle Speed Contr./Throttle Pos. Low Voltage During Adaptation
- DTC P1565/17973 - Throttle Valve Control Module, Lower Stop Not Attained
- DTC P1602/18010 - Pcm Low Voltage
- DTC P1606/18014 - Rough Road Signal Detected
- DTC P1611/18019 - Mil Circuit/TCM Short To Ground
- DTC P1612/18020 - Pcm Incorrect Coding
- DTC P1613/18021 - Mil Circuit Open Or Short To B+
- DTC P1624/18032 - Mil Request Signal Active
- DTC P1640/18048 - Internal Pcm (EEPROM) Error
- DTC P1681/18089 - Pcm Programming Not Finished
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.