The camshaft position (CMP) sensor produces an AC voltage of different amplitude and frequency depending on the velocity of the camshaft in order for the ECM to determine the camshaft position. The CMP sensor detects a single tooth on the reluctor wheel. The ECM expects the signal wire to be near 5 volts when the reluctor wheel tooth passes the sensor and near 0 volts during the remainder of the reluctor wheel revolution. The ECM constantly monitors the CMP signal and expects to see a switch from low to high once every two crankshaft revolutions. The camshaft position (CMP) sensor is used to determine which of the two cylinders is on the firing stroke. With the CKP sensor and CMP sensor inputs the ECM can properly synchronize the ignition timing, fuel delivery and engine knock control. DTC P0341 will set when the ECM detect the CMP sensor signal voltage pattern is invalid.

DTC P0341 will set when the ECM detects the CMP sensor signal voltage pattern is invalid when:

Engine is cranking/running.

DTC P0341 diagnostic runs continuously once the above conditions have been met.

P0341 is a (type B) DTC.

To locate an intermittent problem use the Scan tool to monitor CMP RESYNC COUNTER with engine cranking/running. If the counter toggles between 85 and 170, the crankshaft pulses correctly are being received.

If the CMP RESYNC COUNTER reads 0 counts, there is a low voltage condition present. If the CMP RESYNC COUNTER reads 255 counts, there is a high voltage condition present.

DTC P0341 can set due to an intermittent open, short to ground, or short to voltage in the CMP circuits. If DTC P0342 or P0343 is also set, diagnose those first.

Make sure the crankshaft position sensor circuit wires are clear of voltage interfering wires. Electromagnetic Interference (EMI) waves can alter the amplitude and frequency of the CMP signal and create invalid CMP pulses.

If DTCs P0103, P0108, P0113, P0118, P0123, P0223, P0341, P0406 and P1271 are set, there may be an open circuit in the 5 volt reference return circuit 652.

If DTCs P0102, P0107, P0341 and P0405 are set, there may be an open in the 5 volt reference circuit 416.