The camshaft position (CMP) sensor correlates the crankshaft to camshaft position so that the engine control module (ECM) can determine which cylinder is ready to be fueled by an injector. As the camshaft rotates, the reluctor wheel interrupts a magnetic field produced by a magnet within the sensor and sends a signal to the ECM through the signal circuit. The CMP sensor circuits are directly connected to the ECM. The CMP sensor also determines which cylinder is misfiring. The CMP sensor circuits consist of the following:

P0341

The ECM detects an incorrect CMP signal for more than 10 crankshaft revolutions.

P0342

The ECM detects no CMP signal for more than 1 second.

DTCs P0341 and P0342 are Type B DTCs.

DTCs P0341 and P0342 are Type B DTCs.

The following conditions can also set the DTC:

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Description and Operation

Electronic Ignition (EI) System Description

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

1. Start the engine. Observe the DTC information with a scan tool. DTCs P0341 and P0342 should not set.
2. If the vehicle passes the Circuit/System Verification test, then operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records Data List.

1. Ignition OFF, disconnect the harness connector of the CMP sensor.
2. Ignition ON, verify that a test lamp illuminates between the ignition 1 voltage circuit and battery ground.

⇒	If the test lamp does not illuminate, test the ignition 1 voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition 1 voltage circuit fuse is open, test all components connected to the ignition 1 voltage circuit and replace as necessary.

3. Connect a test lamp between the ground circuit and the ignition 1 voltage circuit of the CMP sensor.

⇒	If the test lamp does not illuminate, test for an open/high resistance on the ground circuit. If circuit/connections test normal, replace the ECM.

4. Ignition ON, test for 4.8-5.2 volts between the signal circuit and ground.

⇒	If less than 4.8 volts, test the signal circuit for a short to ground or an open/high resistance. If the circuits/connections test normal, replace the ECM.

⇒	If more than 5.2 volts, test the signal circuit for a short to voltage. If the circuits/connections test normal, replace the ECM.

5. If all circuits/connections test normal, replace the CMP sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.