DTC P0341: Camshaft Position Sensor Circuit Performance: Description

The Camshaft Position (CMP) sensor is a hall effect switching device used to determine the position of the bank 2 exhaust camshaft. The CMP sensor detects a single tooth on the reluctor wheel of the camshaft, which denotes 90° before top dead center cylinder #1 compression stroke. The ECM expects the CMP sensor signal to be low (0 volts) as the single tooth on the reluctor wheel passes the sensor, and high (5 volts) during the remainder of the reluctor rotation. The ECM monitors the CMP sensor signal in groups of eight crankshaft rotations. It expects to see one transition from high to low every two crankshaft revolutions. A normal pattern with engine running would be 01010101 or 10101010 where a logic "1" means high, and a logic "0" means low. With both CKP sensor and CMP sensor inputs, the ECM can properly synchronize ignition timing, fuel delivery and spark knock control. DTC P0341 sets if the ECM detects extra or missing CMP sensor signal transition within a certain number of crankshaft revolutions.