P0342

Camshaft Position (CMP) Sensor Circuit:

Circuit Description
The Camshaft Position (CMP) Sensor is used to indicate camshaft position so the Powertrain Control Module (PCM) can determine which cylinder is misfiring when misfire is present. Whenever the PCM receives an intermittent signal from the CMP, then the CMP Resync Counter will increment. In order to set a DTC, the PCM must see a minimum number of resync's within a maximum time.

Conditions for Setting the DTC
- The Engine is running
- The Cam Sensor activity counter does not increment

Action Taken When the DTC Sets
- The Malfunction Indicator Lamp (MIL) will illuminate.
- The PCM will record operating conditions at the time the diagnostic fails. This information will be stored in the Freeze Frame and Failure Records buffers.
- A history DTC is stored.

Conditions for Clearing the MIL/DTC
- The MIL will turn "OFF" after three consecutive ignition cycles in which the diagnostic runs without a fault.
- A history DTC will clear after 40 consecutive warm up cycles without a fault.
- DTCs can be cleared by using a scan tool.

Diagnostic Aids
- An "intermittent" problem may be caused by a poor connection, rubbed through wire insulation, or a wire that is broken inside the insulation.
- Any circuitry, that is suspected as causing the intermittent complaint, should be thoroughly checked for, proper mating, broken locks, improperly formed or damaged terminals, or physical damage to the wiring harness.
- Whenever the PCM sees less than 15 resync's in 256 seconds, the counter will reset to 0. Anytime a poor connection is present, the Cam Sensor Reference Activity counter will stop incrementing and the Cam Sensor Resync Counter will start to increment.

DTC P0342 - Camshaft Position (CMP) Sensor Circuit Low (1 Of 2):

DTC P0342 - Camshaft Position (CMP) Sensor Circuit Low (2 Of 2):

Test Description
Numbers below refer to the step numbers on the Diagnostic Table.
1. The OBD System Check prompts the technician to complete some basic checks and store the freeze frame and fault records data on the scan tool if applicable. This creates an electronic copy of the data taken when the fault occurred. The information is then stored on the scan tool for later reference.
2. This step determines if DTC P0342 is the result of a hard fault or an intermittent condition.
4. Determines if voltage is available to the CMP sensor through the PCM.
5. Determines if a ground signal is available to the CMP sensor through the PCM.
7. This step checks for a signal from the CMP sensor. It is necessary to supply B+ to the ignition feed #2 terminal in order for the CMP sensor to have B+ supplied to it. While cranking the engine, the CMP sensor will send a B+ signal and then a ground signal as the reluctor passes the sensor.
15. Replacement PCM must be reprogrammed. Refer to the latest Techline information for programming procedures.