DTC P0341: Camshaft Position Sensor Circuit Performance (SOHC): Description

WARNING: This page is about a different car, the 2002 Pontiac Sunfire, 2002 Pontiac Grand Am, 2002 Oldsmobile Alero, and 2002 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

This ignition system does not use a conventional Camshaft Position (CMP) sensor that detects valve train position. The Ignition Control Module (ICM) detects when #1 or #3 cylinder has fired on the compression stroke using sensing circuitry integrated within each coil. The sensing circuit detects the polarity and the strength of the secondary voltage output, the higher output is always at the event cylinder. The ICM sends a CMP signal to the Powertrain Control Module (PCM) based on the voltage difference between the event and waste cylinder firing energy, this system is called compression sense ignition. By monitoring the CMP and Crankshaft Position (CKP) signals the PCM can accurately time the operation of the fuel injectors. If the PCM receives an intermittent CMP signal from the ICM then the CMP Resync Counter on the scan tool will increment. When the PCM cannot use the information from the CMP signal, a DTC will set. DTC P0341 sets when the PCM detects too many CMP Resyncs within a certain amount of time.