P0342
DTC P0340, P0341, P0342, or P0343
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) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0340
- Intake Camshaft Position (CMP) Sensor Circuit
DTC P0342
- Intake Camshaft Position (CMP) Sensor Circuit Low Voltage
DTC P0343
- Intake Camshaft Position (CMP) Sensor Circuit High Voltage
Diagnostic Fault Information
Circuit/System Description
The camshaft position (CMP) sensor is a magnetic resistance element (MRE) design with a 5-volt reference, a signal high and signal low circuit. When the signal rotor on the intake camshaft rotates past the CMP sensor, the electrical resistance of the sensor's magnetic field changes and the output voltage to the control module switches between high and low.
Conditions for Running the DTC
P0340
* The engine is cranking or running.
* The ignition voltage is greater than 11 volts while cranking.
* DTC P0340 runs continuously once the above condition is met.
P0342 and P0343
* The engine speed is greater than 600 RPM.
* DTC P0342 and P0343 run continuously once the above condition is met.
Conditions for Setting the DTC
P0340
* No CMP sensor signal is detected by the PCM.
OR
* The intake CMP sensor signal voltage is less than 0.3 volts or greater than 4.7 volts for greater than 4 seconds.
P0342
The intake CMP sensor signal voltage is less than 0.3 volts for greater than 4 seconds.
P0343
The intake CMP sensor signal voltage is greater than 4.7 volts for greater than 4 seconds.
Action Taken When the DTC Sets
DTCs P0340, P0342, and P0343 are Type A DTCs.
Conditions for Clearing the DTC
DTCs P0340, P0342, and P0343 are Type A DTCs.
Reference Information
Schematic Reference
Engine Controls Schematics ([1][2]Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Electronic Ignition System Description (Description and Operation)
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 (Programming and Relearning) for scan tool information
Circuit/System Verification
Note: If you were sent here from Engine Cranks but Does Not Run, proceed to Circuit/System Testing.
1. Attempt to start the engine, observe the DTC information with a scan tool. DTCs P0340, P0342, and P0343 should not set.
2. 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.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the intake CMP sensor.
2. Ignition OFF, test for less than 10 ohm between the CMP sensor signal low circuit terminal 2 and ground G104.
• If greater than the specified range, test the signal low circuit for an open/high resistance. If the circuit tests normal, replace the PCM.
3. Ignition ON, test for 4.8-5.2 V on the CMP sensor 5-volt reference circuit terminal 3.
• If less than the specified range, test the 5 volt reference circuit for an open/high resistance or short to ground. If the circuit tests normal, replace the PCM.
• If greater than the specified range, test the 5 volt reference circuit for a short to voltage. If the circuit tests normal, replace the PCM.
4. Test for 4.8-5.2 V on the CMP sensor signal circuit terminal 1.
• If less than the specified range, test the signal circuit for an open/high resistance or short to ground. If the circuit tests normal, replace the PCM.
• If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the PCM.
5. Install a 3 A fused jumper wire to the signal circuit terminal 1.
Note: The engine may stall during this procedure.
6. Engine idling, touch the end of the fused jumper wire to ground. Verify that DTC P0342 sets.
• If DTC P0342 does not set, replace the PCM.
7. Remove the CMP sensor. Inspect the camshaft for a damaged CMP sensor reluctor wheel.
• If a condition is found, repair as necessary.
8. If all circuits test normal, replace the CMP sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Camshaft Position Sensor Replacement - Intake (Camshaft Position Sensor Replacement - Intake)
* Control Module References (Programming and Relearning) for control module replacement, setup, and programming