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.
Diagnostic mode 4: Reset/delete diagnostic data
2009 Audi A6 BaseSECTION Diagnostic mode 4: Reset/delete diagnostic data
WARNING: This page is about a different car, the 2006 Audi A6 and 2005 Audi A6. However, it is still accessible from the selected car via links, so may be relevant.
The following functions are performed in this diagnostic mode:
- All emission relevant malfunctions in the DTC memory will be erased.
- The operating conditions at which a malfunction was stored will be reset.
- All adaptation values will be reset.
- All test results of the diagnostic functions will be reset.
Procedure
- Connect diagnostic tester. → Diagnostic tester, connecting .
- In diagnostic function "address word 33 - OBD" select "Diagnostic mode 3: Check DTC memory.".
- Select desired measured value according to the "PID XX", e.g. "PID 05-Coolant temperature", via the following table.
- Then select "Mode 4: Reset/delete diagnostic data".
Display: Diagnostic data are being erased.
- End diagnosis and switch ignition off.
RENDER: 1.0x
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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.