For 1990-2009 cars

### Circuit Description

The camshaft position (CMP) sensor indicates the camshaft position so that the powertrain control module (PCM) can determine which cylinder is misfiring when a 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 diagnostic trouble code (DTC), the PCM must see a minimum number of resyncs within a calculated time.

### Conditions for Running the DTC

The engine is running.

### Conditions for Setting the DTC

The PCM sees more than 15 CMP sensor resyncs in 256 seconds (4 minutes 16 seconds).

### Action Taken When the DTC Sets

• | The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.

• | The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the 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.

### Diagnostic Aids

If the PCM sees less than 15 resyncs in 256 seconds, the counter is reset to 0. When a faulty electrical connection is present, the CMP Reference Activity counter will stop incrementing and the CMP Resync Counter will increment.

If the condition is intermittent, refer to Intermittent Conditions .

### Test Description

The numbers below refer to the step numbers on the diagnostic table.

1. This step determines if the DTC P0341 is the result of a hard malfunction or an intermittent condition.

2. The counter should stop incrementing with the sensor electrical connector disconnected and set a DTC P0340. If the counter stills increments, this indicates that the PCM is malfunctioning.

3. A poor electrical connection in any of the circuits at the CMP sensor will cause the CMP Resync Counter to increment. Any time a faulty electrical connection is present, the CMP Reference Activity counter will stop incrementing and the CMP Resync Counter will increment.

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

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Engine Controls Schematics
1 | Did you perform the Diagnostic System Check-Engine Controls? | Go to Step 2 | Go to Diagnostic System Check - Engine Controls
2 |

1. Turn ON the ignition, with the engine OFF.
2. Connect a scan tool.

Are any other DTCs set?

Go to Diagnostic Trouble Code (DTC) List

Go to Step 3

3 |

1. Start the engine.
2. Allow the engine to idle.
3. Observe the CMP Resync Counter with the scan tool.

Is the CMP Resync Counter incrementing?

Go to Step 4

Go to Diagnostic Aids

4 |

1. Turn OFF the ignition.
2. Disconnect the CMP sensor electrical connector.
3. Start the engine.
4. Observe CMP Resync on the scan tool.

Did the CMP Resync Counter stop incrementing?

Go to Step 5

Go to Step 6

5 |

1. Turn OFF the ignition.
2. Check for a poor electrical connection at the CMP sensor electrical connector.
3. Repair the electrical connector as necessary. Refer to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 9

Go to Step 6

6 | Replace the camshaft position (CMP) sensor. Refer to the Camshaft Position Sensor Replacement . Did you complete the replacement? | Go to Step 9 | --
7 |

1. Disconnect the PCM electrical connector.
2. Check the CMP terminals for a poor electrical connection.
3. Repair the terminals as necessary. Refer to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 9

Go to Step 8

8 | Replace the PCM. Refer to Powertrain Control Module Replacement . Did you complete the replacement? | Go to Step 9 | --
9 |

1. Use the scan tool in order to clear the DTCs.
2. Turn OFF the ignition for 30 seconds.
3. Start the engine.
4. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC run and pass?

Go to Step 10

Go to Step 2

10 | With a scan tool, observe the stored Information, Capture Info. Does the scan tool display any DTCs that you have not diagnosed? | Go to Diagnostic Trouble Code (DTC) List | System OK