Diagnostic Mode 04: Reset/delete Diagnostic Data

2005 Audi A4 Quattro, 4D Sedan, 3.2 GSECTION Diagnostic Mode 04: Reset/delete Diagnostic Data

Diagnostic Mode 04 is used to reset or delete the following stored information:

  • All emission related malfunctions in the DTC memory.
  • The operating conditions at which a malfunction was stored will be reset.
  • All adaptation values.
  • The test results of all diagnostic functions.

Procedure 

  • Connect the diagnostic tester.
  • Switch the ignition to the "ON" position.
  • Select "Diagnostic Mode 03: Interrogating fault memory ".
  • Then select "Mode 4: Reset/delete diagnostic data".

The diagnostic tester will display: "Diagnostic data are being erased".

  • 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.