P0341

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 CMP resync counter is greater than 15 counts.

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 improper 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 is 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 increment.

DTC P0341 - Camshaft Position (CMP) Sensor Circuit Performance:

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 Data and the Failure records on the scan tool if applicable. This creates an electronic copy of the data taken when the fault occurred. This information on the scan tool can be referred to later.
2. This determines it DTC P0341 is the result of a hard fault or an intermittent condition.
3. The counter should stop incrementing with the CMP sensor electrical connector disconnected. A DTC P0342 should set after two ignition cycles with the CMP sensor disconnected. When the Cam sensor resync counter still increments then the PCM is faulty.
4. By moving the CMP sensor electrical connector, the connections at the sensor are checked. Make sure electrical connector remains securely fastened.
5. A poor connection in any of the circuits at the CMP sensor will cause the CMP Resync Counter to increment. Anytime a poor connection is present, the Cam Sensor Reference Activity counter will stop incrementing and the Cam Sensor Resync Counter will increment.
6. Before replacing the PCM, check terminals for improper mating, broken locks, or physical damage to the wiring harness. Replacement PCM must be reprogrammed. Refer to the latest Techline information for programming procedures.