P0341
DTC P0341 or P0366 (LUW)
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 P0341
- Intake Camshaft Position Sensor Performance
DTC P0366
- Exhaust Camshaft Position Sensor Performance
Circuit/System Description
The camshaft position sensor circuits consist of an engine control module (ECM) supplied 5 V reference circuit, low reference circuit, and an output signal circuit. The camshaft position sensor is an internally magnetic biased digital output integrated circuit sensing device. The sensor detects magnetic flux changes of the teeth and slots of a reluctor wheel attached to the camshaft. As each reluctor wheel tooth rotates past the camshaft position sensor, the resulting change in the magnetic field is used by the sensor electronics to produce a digital output pulse. The sensor returns a digital ON/OFF DC voltage pulse of varying frequency, with varying width output pulses per camshaft revolution that represent an image of the camshaft reluctor wheel. The frequency of the camshaft position sensor output depends on the velocity of the camshaft. The ECM decodes the narrow and wide tooth pattern to identify camshaft position. This information is then used to determine the optimum ignition and injection points of the engine. The ECM also uses camshaft position sensor output information to determine the camshaft relative position to the crankshaft, to control camshaft phasing, and for limp-home operation.
Conditions for Running the DTC
P0341 and P0366 - Fast Event based Camshaft Test
* DTCs P0335, P0336, P0641, and P0651 are not set.
* The crankshaft is synchronized.
* The starter is engaged.
* The DTC runs continuously every medium resolution event when the above conditions are met.
P0341 and P0366 - Slow Event Based Camshaft Test
* DTCs P0335, P0336, P0641, and P0651 are not set.
* The crankshaft is synchronized.
* The DTC runs continuously every engine cycle when the above conditions are met.
Conditions for Setting the DTC
P0341 and P0366 - Fast Event Based Camshaft Test
The ECM receives less than 4 or greater than 6 camshaft pulses during the first 12 medium resolutions.
P0341 and P0366 - Slow Event Based Camshaft Test
The ECM receives less than 398 or greater than 402 camshaft pulses during 100 engine cycles.
Action Taken When the DTC Sets
* DTCs P0341 and P0366 are Type B DTCs.
Conditions for Clearing the DTC
* DTCs P0341 and P0366 are Type B DTCs.
Diagnostic Aids
The following conditions can also set the DTC:
* Physical damage to the camshaft sensor or the reluctor wheel
* Worn or loose camshaft sensor or reluctor wheel
* Improper installation of the camshaft position sensor - intake and camshaft position sensor - exhaust or the reluctor wheel
* Foreign material between the camshaft position sensor - intake and camshaft position sensor - exhaust and the reluctor wheel
* Gap between the camshaft position sensor - intake and camshaft position sensor - exhaust and the reluctor wheel is out of range
Reference Information
Schematic Reference
Engine Controls Schematics [1][2]Electrical Diagrams
Connector End View Reference
Component Connector End Views Fuel Pump and Level Sensor Assembly
Description and Operation Missing
Camshaft Actuator 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 Control Module References for scan tool information
Circuit/System Verification
1. Ignition ON, observe the scan tool DTC information. Verify that DTC P0340 or P0365 is not set.
• If any of the DTCs are set, refer to DTC P0340 or P0365 (LUW) P0340 for further diagnosis.
2. Engine idling, observe the scan tool Intake Camshaft Position Active Counter or the Exhaust Camshaft Position Active Counter parameter. The parameters should be incrementing.
3. Ignition OFF, inspect the engine wiring harness carrying the B23F Camshaft Position Sensor - Intake and B23E Camshaft Position Sensor - Exhaust sensor circuits for the following conditions:
* Close routing of aftermarket electrical equipment
* Close to solenoids, motors, and relays
* If any of these are determined to be a possible source of electrical interference, correct any wiring harness routing or component placement conditions.
4. 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, inspect the appropriate B23 Camshaft Position Sensor for correct installation.
• If the sensor is loose, inspect the sensor and the O-ring for damage, replace as necessary.
2. Inspect the engine for the following conditions:
* The engine oil for debris
* The camshaft reluctor wheel for damage
* The timing belt, tensioner, and sprockets for wear or damage
• If debris is found in the engine oil, inspect the internal engine components to determine the cause. Repair or replace any worn or damaged components.
Component Testing
Static Test
1. Inspect the B23 Camshaft Position Sensor for correct installation. Remove the B23 Camshaft Position Sensor from the engine and inspect the sensor and the O-ring for damage.
• If the sensor is loose, incorrectly installed, or damaged, repair or replace the B23 Camshaft position Sensor.
2. Connect the connector to the B23 Camshaft Position Sensor.
3. Ignition ON, and engine OFF. Observe the scan tool Intake Camshaft Position Active Counter or the Exhaust Camshaft Position Active Counter parameter. Pass a steel object by the tip of the sensor repeatedly. The parameter should increment.
• If the parameter does not increment, replace the B23 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 replacement, programming, and setup.