Conditions for Setting the DTC
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
The ECM detects engine movement by sensing the airflow through the MAF sensor, when airflow is greater than 3 grams per second, or by sensing camshaft position (CMP) sensor pulses.
- The ECM detects that the engine is running, but receives less than 55 or more than 61 CKP sensor pulses, during each engine revolution, for 8 of 10 engine revolutions.
- The ECM detects that the engine is running, but more than 25 crankshaft resyncs have occurred within 25 seconds.