Mass Air Flow Sensor Plausibility

Test 1:

Test 2 - Test 6:

Test 7 - Test 10:

SYMPTOM
P2066-MASS AIR FLOW SENSOR PLAUSIBILITY

WHEN MONITORED
With the engine running.

SET CONDITION
The ECM detects a rationality problem with the MAF Sensor or excessive EGR flow.

POSSIBLE CAUSES
- Air filter
- Air restriction
- Checking for air leaks
- EGR actuation - 1200 RPM
- EGR valve
- MAF sensor
- MAF sensor reading - 3OOO RPM
- Intermittent condition
- EGR restriction