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P0341




DTC P0340 or P0341

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provide an overview of each diagnostic category.

DTC Descriptor

DTC P0340
- Camshaft Position Sensor Circuit

DTC P0341
- Camshaft Position Sensor Performance

Diagnostic Fault Information






Circuit/System Description

The camshaft position (CMP) sensor produces 3 ON/OFF pulses for each revolution of the camshaft. The camshaft position output is pulse width encoded. The engine control module (ECM) uses the camshaft position and crankshaft position output pulses to determine the engine speed and position. The camshaft position is connected directly to the engine control module (ECM).

Conditions for Running the DTC

* The engine control module (ECM) has detected crankshaft position (CKP) sensor pulses.

* The DTCs run continuously when the above conditions are met.

Conditions for Setting the DTC

P0340

The engine control module (ECM) does not detect a camshaft position sensor pulse for greater than 4 crankshaft revolutions.

P0341

The engine control module (ECM) detects erratic camshaft position sensor pulses for greater than 4 camshaft revolutions.

Action Taken When the DTC Sets

* DTC P0340 is a Type A DTC.

* DTC P0340 is a Type B DTC.

Conditions for Clearing the MIL/DTC

DTC P0340 is a Type A DTC.

Diagnostic Aids

If the camshaft position sensor signal is interrupted while the engine is running the engine will operate normally.

Reference Information

Schematic Reference

Engine Controls Schematics [1][2]Electrical Diagrams

Connector End View Reference

Component Connector End Views 1-2 Shift Solenoid (SS) Valve (M30)

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON.

2. Verify DTC P0641 is not set.

• If the DTC is set
Refer to DTC P0641, P0651, P0697, P06A3, P06D2, or P06D6 P0641.

• If the DTC is not set

3. Engine running.

4. Verify the scan tool Camshaft Position Active Counter parameter increments.

• If the counter does not increment
Refer to Circuit/System Testing.

• If the counter increments

5. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

6. Verify the DTC does not set.

• If the DTC sets
Refer to Circuit/System Testing.

• If the DTC does not set

7. All OK.

Circuit/System Testing

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the Camshaft Position (CMP) Sensor. It may take up to 2 minutes for all vehicle systems to power down.

2. Test for less than 5 ohms between the low reference circuit terminal 2 and ground.

• If 5 ohms or greater

1. Ignition OFF, disconnect the X3 harness connector at the Engine Control Module.

2. Test for less than 2 ohms in the low reference circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.

• If 2 ohms or less, replace the Engine Control Module.

• If less than 5 ohms

3. Ignition ON.

4. Test for 4.8-5.2 V between the 5 V reference circuit terminal 3 and ground.

• If less than 4.8 V

1. Ignition OFF, disconnect the X3 harness connector at the Engine Control Module.

2. Test for infinite resistance between the 5 V reference circuit and ground.

• If less than infinite resistance, repair the short to ground on the circuit.

• If infinite resistance.

3. Test for less than 2 ohms in the 5 V reference circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.

• If less than 2 ohms , replace the Engine Control Module.

• If greater than 5.2 V

1. Ignition OFF, disconnect the X3 harness connector at the Engine Control Module, ignition ON.

2. Test for less than 1 V between the 5 V reference circuit and ground.

• If 1 V or greater, repair the short to voltage on the circuit.

• If less than 1 V, replace the Engine Control Module.

• If between 4.8-5.2 V

5. Test for 4.8-5.2 V between the signal circuit terminal 1 and ground.

• If less than 4.8 V

1. Ignition OFF, disconnect the X3 harness connector at the Engine Control Module.

2. Test for infinite resistance between the signal circuit and ground.

• If less than infinite resistance, repair the short to ground on the circuit.

• If infinite resistance.

3. Test for less than 2 ohms in the signal circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.

• If less than 2 ohms, replace the Engine Control Module.

• If greater than 5.2 V

1. Ignition OFF, disconnect the X3 harness connector at the Engine Control Module, ignition ON.

2. Test for less than 1 V between the signal circuit and ground.

• If 1 V or greater, repair the short to voltage on the circuit.

• If less than 1 V, replace the Engine Control Module.

• If between 4.8-5.2 V

6. Verify DTC P0341 is not set.

• If the DTC is set
Inspect for the conditions listed below:

* Excessive play or looseness of the Camshaft Position Sensor or the reluctor wheel

* Improper installation of the Camshaft Position Sensor

* Foreign material passing between the Camshaft Position Sensor and the reluctor wheel

* Damaged reluctor wheel

* Excessive air gap between the Camshaft Position Sensor and the reluctor wheel

* Engine oil for debris

* Timing chain, tensioner, and sprockets for wear or damage

• If any of the conditions above are found, repair as necessary.

• If all components test normal, test or replace the Camshaft Position Sensor.

• If the DTC is not set

7. Replace the Camshaft Position Sensor.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

* Camshaft Position Sensor Replacement Service and Repair

* Control Module References Control Module References for engine control module (ECM) replacement, programming, and setup.

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