P0342
DTC P0342CIRCUIT DESCRIPTION
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 the 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 circuits between the CMP sensor and the ECM consists of the following:
- A ground circuit
- A CMP signal circuit
If the ECM detects no pulses from the CMP sensor, DTC P0342 sets.
DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC P0342 Camshaft Position (CMP) Sensor Low Voltage
CONDITIONS FOR RUNNING THE DTC
- The engine is running.
- DTC P0342 runs continuously when the above condition is met.
CONDITIONS FOR SETTING THE DTC
The ECM detects no CMP pulses in 32 camshaft rotations.
ACTION TAKEN WHEN THE DTC SETS
- The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
- The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame/Failure Records.
CONDITIONS FOR CLEARING THE MIL/DTC
- The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
- A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
- Clear the MIL and the DTC with a scan tool.
TEST
Steps 1-2:
Steps 3-5:
Steps 6-8:
Steps 9-11:
Steps 12-15:
