Reset air mass sensor adaptation values


Under normal operating conditions, the air mass sensor is subject to both contamination and ageing. This will affect the difference between the stored characteristic curve and the prescribed value. This may cause symptoms such as loss of power or black smoke. The air mass sensor adaptation values can be reset to prevent this problem.

The air mass sensor adaptation values must be reset if the air mass sensor is replaced.

Test conditions:

Procedure:

  1. Start the function.

  2. The current adaptation values are read out from the engine control unit.

  3. Press "OK" to reset the adaptation values.

  4. Once the adaptation values have been reset, the ignition must be switched off for at least 1 minute to allow the new adaptation values to be saved in the engine control unit.