P0341
DTC 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 provides an overview of each diagnostic category.
DTC Descriptor
DTC P0341
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Camshaft Position Sensor Performance
Diagnostic Fault Information
Circuit/System Description
The 4X 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 between the peaks and valleys of a 4-tooth 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 two narrow, and two wide 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 sequence the ignition timing and fuel injection events for the engine. The ECM also uses camshaft position sensor output information to determine the camshaft relative position to the crankshaft, to control the camshaft position actuator if equipped, and for limp-home operation.
Conditions for Running the DTC
* DTC P0641, or P0651 is not set.
* The engine is cranking or running.
* DTCs run continuously when the above conditions are met.
Conditions for Setting the DTC
Note:
The ECM detects engine movement by sensing the airflow through the MAF sensor, when airflow is greater than 3 grams per second, or by sensing crankshaft position sensor pulses.
* The ECM detects that the engine was started, but has received less than 2 or more than 8 camshaft position sensor pulses during the first engine resolution.
* The ECM detects that the engine has started and is running, but receives less than 398 or more than 402 camshaft position pulses per 100 engine cycles in 800 of 1000 engine cycles.
Action Taken When the DTC Sets
* DTC P0341 is a Type B DTC.
* The camshaft position actuator, if equipped, is commanded to the parked position.
* The ignition system defaults to a failed camshaft position sensor limp home mode.
Conditions for Clearing the DTC
DTC P0341 is a Type B DTC.
Diagnostic Aids
* With this DTC set, the engine may crank for an extended period of time during start-up.
* This test procedure requires that the vehicle battery has passed a load test and is completely charged. Refer to Battery Inspection/Test Battery Inspection/Test.
Reference Information
Schematic Reference
Engine Controls Schematics (LS3) [1][2]Electrical DiagramsEngine Controls Schematics (LS9) [1][2]Electrical DiagramsEngine Controls Schematics (LS7) [1][2]Electrical Diagrams
Connector End View Reference
Component Connector End Views Folding Top 5 Bow Lowered Switch (CM7)
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 Control Module References for scan tool information
Special Tools
J 35616-A/BT-8637 - Connector Test Adapter Kit
Circuit/System Verification
1. Ignition OFF, inspect the engine wiring harness carrying the camshaft position 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 wire harness routing or component placement conditions.
2. Engine idling, observe the scan tool Camshaft Position Active Counter parameter. Parameter should be incrementing.
3. Engine idling, observe the DTC information with a scan tool. DTC P0341 or P0366 should not set.
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 camshaft position sensor for looseness and correct installation.
• If the camshaft position sensor is loose, inspect the sensor and the O-ring for damage, and replace as necessary.
2. Inspect the engine for the following conditions:
* Engine oil for debris
* Camshaft reluctor wheel for damage
* The timing chain, timing chain 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
Important:
You must perform the Circuit/System Testing before proceeding with Component Testing.
1. Inspect the camshaft position sensor for correct installation. Remove the camshaft position sensor from the engine and inspect the sensor O-ring for damage.
• If the sensor is loose, incorrectly installed, or damaged, replace the camshaft position sensor.
2. Connect the camshaft position sensor harness connector to the camshaft position sensor.
3. Ignition ON, engine OFF, observe the Camshaft Position Active Counter parameter on the scan tool.
4. Pass a flat steel object across the tip of the sensor repeatedly. The Camshaft Position Active Counter parameter should increment with each pass of the steel object.
• If the parameter does not increment, replace the camshaft position sensor.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Camshaft Position Sensor Replacement Service and Repair
* Engine Control Module Programming and Setup Testing and Inspection
* Engine Control Module Replacement Service and Repair