P0342
DTC P0341 or P0342
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Strategy Based Diagnosis Strategy Based Diagnosis
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions
DTC Descriptors
DTC P0341
- Camshaft Position (CMP) Sensor Performance
DTC P0342
- Camshaft Position (CMP) Sensor Circuit Low Voltage
Diagnostic Fault Information
Circuit/System Description
The camshaft position (CMP) sensor correlates the crankshaft to camshaft position so that the engine control module (ECM) can determine which cylinder is ready to be fueled by an injector. As the camshaft rotates, the reluctor wheel interrupts a magnetic field produced by a magnet within the sensor and sends a signal to the ECM through the signal circuit. The CMP sensor circuits are directly connected to the ECM. The CMP sensor also determines which cylinder is misfiring. The CMP sensor circuits consist of the following:
* An ignition 1 voltage
* A low reference
* A CMP signal
Conditions for Running the DTC
* DTCs P0335, P0336 and P0337 are not set.
* The engine is running.
* The DTCs run continuously once the above conditions are met.
Conditions for Setting the DTC
P0341
The ECM detects an incorrect CMP signal for more than 10 crankshaft revolutions.
P0342
The ECM detects no CMP signal for more than 1 second.
Action Taken when the DTC Sets
* DTC P0341 is a Type B DTC.
* DTC P0342 is a Type A DTC.
Conditions for Clearing the MIL/DTC
* DTC P0341 is a Type B DTC.
* DTC P0342 is a Type A DTC.
Diagnostic Aids
The following conditions can also set the DTC:
* Physical damage to the CMP sensor or the reluctor wheel
* Excessive play or looseness of the CMP sensor or the reluctor wheel
* Improper installation of the CMP sensor or the reluctor wheel
* Foreign material passing between the CMP sensor and the reluctor wheel
* Excessive air gap between the CMP sensor and the reluctor wheel
Reference Information
Schematic Reference
Engine Controls Schematics (w/Throttle Actuator Controls) Electrical DiagramsEngine Controls Schematics (w/o Throttle Actuator Control) Electrical Diagrams
Connector End View Reference
* Engine Control Module Connector End Views (w/ Throttle Actuator Control) Engine Control Module Connector End Views (w/ Throttle Actuator Control)Engine Control Module Connector End Views (w/o Throttle Actuator Control) Engine Control Module Connector End Views (w/o Throttle Actuator Control)
* Engine Controls Connector End Views (w/ Throttle Actuator Control) Engine Controls Connector End Views (w/ Throttle Actuator Control)Engine Controls Connector End Views (w/o Throttle Actuator Control) Engine Controls Connector End Views (w/o Throttle Actuator Control)
Description and Operation
Electronic Ignition (EI) System Description Electronic Ignition (EI) System Description
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
* Scan Tool Data List (w/ Throttle Actuator Control) Scan Tool Data List (w/ Throttle Actuator Control)Scan Tool Data List (w/o Throttle Actuator Control) Scan Tool Data List (w/o Throttle Actuator Control)
* Scan Tool Data Definitions (w/ Throttle Actuator Control) Scan Tool Data Definitions (w/ Throttle Actuator Control)Scan Tool Data Definitions (w/o Throttle Actuator Control) Scan Tool Data Definitions (w/o Throttle Actuator Control)
* Scan Tool Output Controls (w/ Throttle Actuator Control) Scan Tool Output Controls (w/ Throttle Actuator Control)Scan Tool Output Controls (w/o Throttle Actuator Control) Scan Tool Output Controls (w/o Throttle Actuator Control)
Circuit/System Verification
Start the engine, observe the DTC information with a scan tool. DTCs P0341 and P0342 should not set.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the CMP sensor.
2. Ignition ON, verify that a test lamp illuminates between the ignition 1 voltage circuit and ground.
• If the test lamp does not illuminate, test the ignition 1 voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition 1 voltage circuit fuse is open, test all components connected to the ignition 1 voltage circuit and replace as necessary.
3. Connect a test lamp between the ground circuit and the ignition 1 voltage circuit. Verify the test lamp illuminates.
• If the test lamp does not illuminate, repair the open/high resistance on the ground circuit.
4. Ignition ON, test for 4.8-5.2 volts between the signal circuit and the ground circuit.
• If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuits/connections test normal, replace the ECM.
• If more than the specified range, test the signal circuit for a short to voltage. If the circuits/connections test normal, replace the ECM.
5. If all circuits/connections test normal, replace the CMP sensor.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Camshaft Position Sensor Replacement Service and Repair
* Control Module References Control Module References for engine control module replacement, setup, and programming