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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 81 (Engine Controls - Self-Diagnostics - 8.1L) >> Diagnostic Tests >> DTC P0341: Camshaft Position Sensor Circuit Performance >> Diagnostic Procedures

Diagnostic Procedures

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  1. Did you perform the Diagnostic System Check-Engine Controls? If yes, go to next step. If no, see DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS  under SELF-DIAGNOSTIC SYSTEM.
    2. NOTE: If there are any other CMP DTCs set, diagnose those DTCs first. See DIAGNOSTIC TROUBLE CODE DEFINITIONS .
  2. Install a scan tool. Idle the engine for 2 minutes. Does the scan tool indicate that DTC P0341 failed this ignition cycle? If yes, go to next step. If no, see DIAGNOSTIC AIDS .
  3. Visually and physically inspect all circuits going to the CMP sensor for the following:
    • Being routed too close to secondary ignition wires or components.
    • Being routed too close to after-market add-on electrical equipment.
    • Being routed too close to solenoids, relays, and motors.

    If you find incorrect routing, correct the harness routing. Did you find and correct the condition? If yes, go to step  8. If no, go to next step.

  4. Inspect for poor connections at the CMP sensor. If you find a poor connection, repair the terminal as necessary. Did you find and correct the condition? If yes, go to step  8. If no, go to next step.
  5. Inspect for poor connections at the PCM for the CMP sensor circuits. If you find a poor connection, repair the terminal as necessary. Did you find and correct the condition? If yes, go to step  8. If no, go to next step.
  6. Remove the CMP sensor. Inspect the CMP sensor for signs of damage. Does the CMP sensor show signs of damage? If yes, go to next step. If no, see DIAGNOSTIC AIDS .
  7. Replace the CMP sensor. See appropriate REMOVAL, OVERHAUL & INSTALLATION article. After repairs, go to next step.
  8. Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running DTC. Does the DTC run and pass? If yes, go to next step. If no, go to step  2.
  9. Observe the stored information, Capture Info with a scan tool. Does the scan tool display any DTCs that you have not diagnosed? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, system is okay.
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