P0341 is a generic OBD-II code defined as Camshaft Position Sensor “A” Circuit Range/Performance.
Your vehicle’s engine control module (ECM) constantly receives a signal from the crankshaft position sensor (CKP) and compares it to a signal obtained from the camshaft position sensor (CMP).
The CMP signal is generated through a reluctor wheel attached to the camshaft that passes by the camshaft sensor.
Trouble code P0341 is triggered when the camshaft position sensor signal exceeds the expected range or doesn’t align with the crankshaft position sensor signal. It’s important to note that extended cranking periods can also set this code.
The ignition control module (ICM) gathers information from a triggering device (usually the crank sensor or cam sensor) to determine your vehicle’s base ignition timing.
The ICM produces the camshaft position PCM input by filtering the CMP sensor pulses when the engine is in motion, and the CKP sync pulses are also being received.
The PCM constantly checks the number of pulses on the camshaft position PCM input circuit. It compares the number of camshaft position PCM input pulses to the number of 18X reference pulses and the number of 3X reference pulses being received.
Note: The 18X pulses (18 pulses per 360O of the crankshaft) and 3X pulses (3 pulses per 360O of the crankshaft) are signals from the CKP sensor.
If the PCM gets an inaccurate number of pulses on the circuit, DTC P0341 is triggered.
In such cases, the PCM will initiate the injector sequence without the camshaft position PCM input (with a one in six chance that the injector sequence is correct.) The engine will start and run normally, but the misfire diagnostic may be disabled.
Diagnostic trouble code P0341 is generally identified by a host of symptoms. Following are some of the common ones:
Note: Depending on your vehicle’s make, the check engine light may be called Malfunction Indicator Lamp (MIL) or Service Engine Soon (SES) light.
It’s best to diagnose and repair DTC P0341 before you take your car out for a drive. A failed CMP sensor can cause your vehicle’s engine to stall, jerk, or misfire, leading to a rough driving experience. You’ll even fail the emissions test because the check engine light is on.
Further, due to issues in the camshaft position sensor performance, your engine’s fuel economy may diminish, and it may start with a lot of struggle. You may also observe varying engine speed.
So it’s best to get the CMP sensor checked by a certified mechanic before resuming regular driving.
Here are some of the root causes that could trigger DTC P0341:
You should only consult a certified technician to perform the diagnosis rather than attempt to repair it independently.
A mechanic will typically follow these steps to identify the root cause:
Firstly, they’ll examine your vehicle for the presence of any other engine codes, apart from the P0341 code, via a good OBD-II scan tool. If other codes are detected, the mechanic will repair them immediately.
Next, your mechanic will closely assess your vehicle’s CMP sensor for anomalies.
This includes looking for:
On spotting any of the above, your mechanic will repair them on priority.
Then they’ll inspect the reluctor wheel on the cam gear for any signs of damage or missing teeth. They can do it by viewing through the camshaft sensor hole in an engine’s timing cover. If it’s not visible, they’ll remove the timing chain cover to inspect the reluctor wheel.
The freeze frame data captures the erroneous values of the cam sensor when the P0341 code is first detected. This information is stored in the engine’s memory and can be accessed via an OBD-II scan tool.
During diagnosis, your technician can refer to the freeze frame data to gauge the underlying cause of the P0341 trouble code.
By analyzing the freeze frame data, the mechanic can decode how often the faulty CMP signal arises and what’s causing the issues in the camshaft position sensor performance.
The mechanic will verify the cam timing, as the code can be set when a timing belt or chain jumps a tooth.
The mechanic will check if the resistance and voltage values indicated at the camshaft position sensor align with the specific values denoted by the vehicle’s manufacturer.
In this step, they must verify that all power, ground, and signal sources provide a steady feed to the cam position sensor.
Next, the mechanic will check for proper current flow from the camshaft position sensor to the PCM on the harness signal wire. They can refer to a wiring diagram specific to your car model for accuracy.
If continuity (complete path for current flow) is not present, they’ll locate the source of the break or gap within the camshaft position sensor circuit.
If continuity is present and still the code P0341 persists, your mechanic will replace the camshaft position sensor.
Finally, the mechanic will reset the codes to clear the OBD-II fault codes and retest your vehicle to see if the P0341 code reappears.
P0341 can be caused due to a timing chain stretched over time or an issue in the wiring harness. To resolve the P0341 code, one has to get to the exact root cause of the problem, leading to the mismatched signals from the camshaft sensor and crank sensor.
We recommend consulting a technician with specialized mechanical knowledge for effective repair and long-lasting solutions.
The certified technician may perform any of the below-mentioned procedures in an attempt to clear the trouble code:
Here’s what you can expect to pay for repairing P0341:
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