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.
1996 Audi A4 Base, StandardFACTORY OEM SERVICE PROCEDURE
DTC Testing: Notes
DTC DEFINITIONS
| Code | Fault Description |
|---|---|
| 00000 | No Fault Detected |
| 00257 | Left/Front Inlet Valve Circuit |
| 00259 | Right/Front Inlet Valve Circuit |
| 00265 | Left/Front Outlet Valve Circuit |
| 00267 | Right/Front Outlet Valve Circuit |
| 00273 | Left/Rear Inlet Valve Circuit |
| 00274 | Right/Rear Inlet Valve Circuit |
| 00275 | Right/Rear Outlet Valve Circuit |
| 00276 | Left/Rear Outlet Valve Circuit |
| 00277 | Left/Front Inlet/Outlet Valve Circuit |
| 00283 | Left/Front Wheel Speed Sensor |
| 00284 | Left/Front Wheel Speed Sensor |
| 00285 | Right/Front Wheel Speed Sensor |
| 00287 | Right/Rear Wheel Speed Sensor |
| 00290 | Left/Rear Wheel Speed Sensor |
| 00301 | ABS Return Flow Pump |
| 00302 | ABS Solenoid Valve |
| 00526 | Stoplight Switch/All Wheel Drive Circuit |
| 00529 | RPM Data Missing (TCS Only) |
| 00532 | Supply Voltage |
| 00597 | Varying (Erratic) Wheel Speed Signal |
| 00623 | ABS/Transmission Circuit (TCS Only) |
| 00642 | Right/Front EDL Switchover Valve (EDL Only) |
| 00643 | Right/Front EDL Outlet Valve (EDL Only) |
| 00644 | Left/Front EDL Switchover Valve (EDL Only) |
| 00645 | Left/Front EDL Outlet Valve (EDL Only) |
| 00646 | TCS/Motor Electrical Connection No. 1 |
| 00647 | TCS/Motor Electrical Connection No. 2 |
| 00668 | Battery Positive Terminal 30 |
| 00761 | DTC Stored In ECM (TCS Only) |
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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