P0341 Chevrolet Uplander I

1. The ECM detects that the engine has started, but has received either of the following during the first engine revolution: Less than or more than 4 CMP sensor pulses, if equipped with an automatic transmission less than 4 or more than 8 CMP sensor pulses, if equipped with a manual transmission OR
2. The ECM detects that the engine is running, but receives less than 398 CMP or more than 402 CMP sensor pulses per 100 engine cycles in 800 of 1000 engine cycles.

Action Taken When the DTC Sets

1. The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
2. The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.
3. The CMP actuator is commanded to the home or parked position.
4. The ignition system defaults to a failed CMP sensor limp home mode.