P0341
DTC P0341
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.
DTC Descriptor
DTC P0341
- Camshaft Position (CMP) Sensor Performance
Diagnostic Fault Information
Circuit/System Description
The camshaft position (CMP) sensor is a 1X sensor. The CMP sensor provides one digital ON/OFF signal to the ignition control (IC) module per revolution of the camshaft. The CMP sensor is connected directly to the IC module and sends the CMP sensor pulses to the powertrain control module (PCM) on the camshaft position signal. This information is used by the PCM to determine the position of the valve train relative to the crankshaft position (CKP). By monitoring the CMP and CKP signals, the PCM can accurately time the operation of the fuel injectors. The PCM monitors the CMP sensor for errors. The CMP sensor wiring includes the following circuits:
* The CMP sensor signal circuit
* A shared 12-volt reference circuit
* A shared low reference circuit
* A camshaft position signal circuit
Conditions for Running the DTC
* The engine is cranking or running for more than 3 seconds.
* The DTC runs continuously when the above condition is met.
Conditions for Setting the DTC
Important: The PCM detects engine movement by sensing the airflow through the mass air flow (MAF) sensor is more than 3 g/s, or by sensing CMP sensor pulses.
* The PCM detects 36 medium resolution engine speed signals for every 2 engine revolutions while receiving 6 low engine speed signals and more than 1 camshaft position signal.
* The above condition is met for more than 8 seconds.
Action Taken When the DTC Sets
DTC P0341 is a Type B DTCs.
Conditions for Clearing the MIL/DTC
DTC P0341 is a Type B DTCs.
Reference Information
Schematic Reference
Engine Controls Schematics (Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Electronic Ignition (EI) System Description (Electronic Ignition (EI) System Description)
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Diagnostic Trouble Code Descriptions)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Verification
1. With the ignition OFF, inspect the engine wiring harnesses carrying the CKP sensor circuits for the following conditions:
* Close routing of secondary ignition wires
* Close routing of aftermarket electrical equipment
* Close to solenoids, motors, and relays
• Correct any wire harness routing or component placement conditions, if it is determined to be a possible source of electrical interference.
2. Monitor the CMP RPM and the CMP signal Present parameters. The parameters should indicate RPM and display YES continuously with the engine running or cranking.
3. 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. Test for less than 1 ohm on the camshaft position signal circuit IC module terminal J.
• If greater than the specified value, test the camshaft position signal circuit for an open/high resistance.
2. Ignition OFF, inspect the CMP sensor for looseness and correct installation.
• If the sensor is loose, inspect the sensor and the O-ring for damage, replace as necessary.
3. Inspect the engine for the following conditions:
* Engine oil for debris and contamination
* Crankshaft reluctor wheel for damage
* The 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.
4. If the camshaft position signal circuit, CMP sensor and engine timing components test normal, replace the IC module.
Component Test
Important: You must perform the Circuit/System Testing before proceeding with Component Testing.
1. Inspect the CMP sensor for looseness and correct installation. Remove the CMP 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 CMP sensor.
2. Connect the CMP sensor connector to the CMP Sensor; turn ON the ignition, with the engine OFF.
3. Ignition ON and engine OFF, observe the CMP RPM parameter on the scan tool; pass a steel object by the tip of the sensor repeatedly. The CMP Active Counter parameter should increment.
• If the parameter does not increment, replace the CMP sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Camshaft Position Sensor Replacement
* Control Module References (Programming and Relearning) for IC module, and PCM replacement, setup, and programming