Where is the camshaft position sensor located?

Tiny
MAMALOCA
  • MEMBER
  • 2005 CHEVROLET MALIBU
  • 2.2L
  • 4 CYL
  • AUTOMATIC
  • 125,321 MILES
Coil unit and the module its not AcDelco and spark plugs car is running but now the code its showing is po341. Since the coil unit and module are not AcDelco will it show the po341 now because it wasn't showing before. All the other codes it showed went away but now its showing po341. What do you think is the real problem?
Sunday, January 31st, 2021 AT 2:22 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

Yes, quality matters. I would use an OEM module to be sure it is not the module itself as it is the cam sensor.

Make sure plug wire boots are good. If they are leaking, it will set this code.

Roy

DTC P0341

CIRCUIT DESCRIPTION
This ignition system does not use a conventional camshaft position (CMP) sensor that detects valve train position. The ignition control module (ICM) detects when #1 or #3 cylinder has fired on the compression stroke using sensing circuitry integrated within each coil. The sensing circuit detects the polarity and the strength of the secondary voltage output. The higher output is always at the event cylinder. The ICM sends a camshaft position signal to the powertrain control module (PCM) based on the voltage difference between the event and waste cylinder firing energy. This system is called compression sense ignition. By monitoring the camshaft position and crankshaft position signals the PCM can accurately time the operation of the fuel injectors. If the PCM receives an intermittent camshaft position signal from the ICM then DTC P0341 will set.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC P0341 Camshaft Position (CMP) Sensor Performance

CONDITIONS FOR RUNNING THE DTC
- The engine is running.
- DTC P0341 run continuously once the engine is running.

CONDITIONS FOR SETTING THE DTC
The PCM detects 8 failures out of the last 10 tests when manifold absolute pressure (MAP) is more than 45 kPa.

ACTION TAKEN WHEN THE DTC SETS
- The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
- The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.

CONDITIONS FOR CLEARING THE MIL/DTC
- The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
- A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
- Clear the MIL and the DTC with a scan tool.

DIAGNOSTIC AIDS
- An intermittent fault in the crankshaft position (CKP) circuits may cause the PCM to resync the cam and may set this DTC.
- An intermittent short to voltage on the camshaft position signal can set this DTC. A direct short to voltage on the camshaft position signal circuit will set DTC P0340, as there will be no change in the camshaft position signal input.
- Electromagnetic interference (EMI) may also set DTC P0341. Inspect the wiring harness for the following:
- Damage
- Being routed too close to motors, solenoids, and relays
- Being routed too close to secondary ignition wires or components
- Being routed too close to aftermarket add-on electrical equipment
If this DTC is determined to be intermittent, refer to Intermittent Conditions. See: Computers and Control Systems > Initial Inspection and Diagnostic Overview > Intermittent Conditions
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Monday, February 1st, 2021 AT 3:09 AM

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