Checking Mass Air Flow Sensor

Checking Mass Air Flow Sensor







- Engine running.

Check and compare the calculated air mass with the actual air mass readout from the mass air flow sensor.

Try by measuring at different rpms.

HINT: Differences of more than approx. 20% between the signals indicate a malfunction of the mass air flow sensor. Remedy as necessary.

NOTE: When replacing mass air flow sensor, repeat the check to verify that the problem has been solved with the replacement.

For more information about current fuel compensation, press 1, otherwise press 2.

1: Refer to Readout of Total Fuel Compensation. Readout of Total Fuel Compensation
2: Refer to Reset Adaptations. Reset Adaptations