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For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2001 🢒 Corvette 🢒 Engine 🢒 Engine Controls - 5.7L 🢒 DTC P0341

Circuit Description

The camshaft position (CMP) sensor works in conjunction with a 1X reluctor wheel on the camshaft. The powertrain control module (PCM) provides a 12-volt reference, a low reference, and a signal circuit to the CMP sensor.

The CMP sensor determines whether a cylinder is on a firing stroke or on an exhaust stroke. A magnet within the sensor produces a magnetic field. The reluctor wheel of the rotating camshaft interrupts this magnetic field. The sensor's internal circuitry detects this field, and produces a signal which the PCM reads. The PCM uses this 1X signal in combination with the 24X signal of the crankshaft position (CKP) sensor in order to determine the crankshaft position and the stroke. The PCM monitors for a loss of the CMP sensor signal.

As long as the PCM receives the CKP sensor 24X signal, the engine will start. The PCM can determine the top dead center for all of the cylinders just by using the CKP sensor 24X signal. The PCM uses the CMP sensor 1X signal in order to determine which stroke the cylinder, at the top dead center, is on. The 1X signal indicates if the cylinder is on the firing stroke, or on the exhaust stroke. The system attempts synchronization, and looks for an increase in the engine speed indicating that the engine started. If the PCM does not detect an increase in the engine speed, the PCM assumes that the PCM is incorrectly synchronized to the exhaust stroke. The PCM synchronizes to the opposite cam position. A slightly longer cranking time may be a symptom of this condition.

Conditions for Running the DTC

The engine speed is less than 4000 RPM.

Conditions for Setting the DTC

The PCM detects that the CMP and the CKP were misaligned for 10 seconds.

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
    • The following conditions may cause this DTC to set:
       - Camshaft reluctor wheel damage
       - A sensor that is in contact with the reluctor wheel
    • For an intermittent conditions, refer to Intermittent Conditions .

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. This step verifies that the malfunction is present.

    2.

  2. This step tests for electromagnetic interference (EMI) on the CMP sensor circuits.

    3.

  3. Damage to the reluctor wheel can affect the CMP sensor output. Vertical lines across the face of the sensor can indicate foreign material passing between the CMP sensor and the reluctor wheel. This condition may cause this DTC to set.

Step

Action

Yes

No

Schematic Reference: Engine Controls Schematics

1

Did you perform the Diagnostic System Check-Engine Controls?

Go to Step 2

Go to Diagnostic System Check - Engine Controls

2

Important: If there are any other CMP DTCs set, diagnose those DTCs first.

  1. Connect a scan tool.
  2. Start the engine, and idle the engine for 2 minutes.

Does the scan tool indicate that DTC P0341 failed this ignition?

Go to Step 3

Go to Diagnostic Aids

3

  1. Inspect the CMP sensor circuits for harnesses and wiring that are routed too close to the following components:
    2. • The secondary ignition wires, or the wires to the components
    • Aftermarket add-on electrical equipment
    • The solenoids
    • The relays
    • The motors
  2. Correct the harness routing.

Did you find and correct the condition?

Go to Step 8

Go to Step 4

4
  1. Inspect the terminal contact at the PCM for the CMP sensor circuits. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
  2. Repair or replace the terminal if you find a condition. Refer to Repairing Connector Terminals in Wiring Systems.

Did you find and correct the condition?

Go to Step 8

Go to Step 5

5
  1. Remove the intake manifold. Refer to Intake Manifold Replacement in Engine Mechanical-5.7L.
  2. Inspect the terminal contact at the CMP sensor. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
  3. Repair or replace the terminals. Refer to Repairing Connector Terminals in Wiring Systems.

Did you find and correct the condition?

Go to Step 8

Go to Step 6

6

  1. Remove the CMP sensor. Refer to Camshaft Position Sensor Replacement .
  2. Inspect the Camshaft reluctor for signs of damage.
  3. If the Camshaft reluctor wheel is damaged, refer to Camshaft Replacement in Engine Mechanical-5.7L.

Did you find and correct the condition?

Go to Step 8

Go to Step 7

7

Replace the CMP sensor. Refer to Camshaft Position Sensor Replacement .

Did you complete the replacement?

Go to Step 8

--

8
  1. Use a scan tool in order to clear the DTCs.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC run, and pass?

Go to Step 9

Go to Step 2

9

With a scan tool, observe the stored information, Capture Info.

Does the scan tool display any DTCs that you have not diagnosed?

Go to Diagnostic Trouble Code (DTC) List

System OK