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.
Interrogating the Fault Memory
2009 Audi A6 BaseSECTION Interrogating the Fault Memory
WARNING: This page is about a different car, the 2007 Audi A4, 2006 Audi A4, and 2005 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
Procedure
- Connect the diagnostic tester.
- Switch the ignition to the "ON" position.
- Select "Diagnostic Mode 03: Interrogating fault memory ".
- The stored DTC or DTCs will be displayed on the diagnostic tester screen.
The following table is an example of the DTC information that may be displayed on the diagnostic tester screen:
| Indication example | Explanation |
|---|---|
| P0444 | SAE Diagnostic Trouble Code (DTC) |
| Evaporative Emission (EVAP) Canister Purge Regulator Valve | Malfunctioning wiring path or malfunctioning component |
| Circuit Open | Malfunction type as next |
- Refer to the following DTC tables for the diagnostic repair procedure:
- SAE P0xxxDTCs. → SAE P0xxx-DTCs .
- SAE P1xxx-DTCs → SAE P1xxx-DTCs .
- SAE P2xxxDTCs. → SAE P2xxx-DTCs .
- SAE P3xxxDTCs. → SAE P3xxx-DTCs .
- SAE U0xxxDTCs, → SAE U0xxx-DTCs .
Fuel, air mixture, and additional emissions regulations
- Switch the ignition off.
- End of diagnosis.
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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.