GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2002 🢒 Corvette 🢒 Engine 🢒 Engine Controls - 5.7L 🢒 DTC P0336

Circuit Description

The crankshaft position (CKP) sensor signal indicates the crankshaft speed and position. The CKP sensor is connected directly to the powertrain control module (PCM) and consists of the following circuits:

    • The 12-volt reference circuit
    • The low reference circuit
    • The CKP sensor signal circuit

Conditions for Running the DTC

The engine is cranking or running.

Conditions for Setting the DTC

The PCM determines that the CKP sensor signal is out of range for less than 2 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

Important: 

   • Before you service the PCM or the throttle actuator control (TAC) module, remove any debris from the module connector surfaces. Inspect the module connector gaskets if you diagnose the modules, or replace the modules. Verify that the gaskets are correctly installed. The gaskets prevent contaminate intrusion into the modules.
   • For any test that requires probing the PCM or probing a component harness connector, use the Connector Test Adapter Kit J 35616 . Using this kit prevents damage to the component terminals or to the harness. Refer to Using Connector Test Adapters in Wiring Systems.

    • The following conditions may cause this DTC to set:
       - Poor connections--Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
       - An incorrectly installed or damaged crankshaft reluctor wheel
       - A sensor that is in contact with the reluctor wheel
       - The engine has run out of fuel
       - If the vehicle has a manual transmission and the crankshaft has rotated backwards--This condition occurs if the following conditions exist:
   • The vehicle is on an incline
   • The clutch is released
   • The engine stalls
    • Loose crankshaft end play will cause the CKP sensor reluctor wheel to move out of alignment with the CKP sensor. This may result in one of the following conditions:
       - The engine is not starting
       - A start and a stall
       - Unstable performance
    • A propeller shaft which is incorrectly installed may cause crankshaft end play.
    • For an intermittent, refer to Intermittent Conditions .

Test Description

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

  1. This step tests for electromagnetic interference (EMI) on the CKP sensor circuits.

    2.

  2. Vertical lines across the face of the sensor may indicate foreign material passing between the CKP sensor and the reluctor wheel. Lines which are not vertical across the face of the sensor may indicate a crack in the CKP sensor. Either of these conditions will cause this DTC to set.

    3.

  3. Damage to the reluctor wheel can affect the CKP sensor output.

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: Before proceeding with this DTC, diagnose DTC P0335, if active.

  1. Observe the Freeze Frame/Failure records data for this DTC.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. In order to operate the vehicle under the conditions which set the DTC, use the following information:
    5. • The data in the Freeze Frame/Failure Records
    • The parameters listed in the Conditions for Running in the DTC

Does the DTC fail this ignition?

Go to Step 3

Go to Diagnostic Aids

3

  1. Inspect the CKP sensor for circuit harnesses and for wires that are routed too close to the following components:
    2. • The wires to other components, or the secondary ignition wires
    • 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 9

Go to Step 4

4
  1. Inspect for poor connections at the CKP sensor. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
  2. If you find a poor connection, repair the terminal as necessary. Refer to Repairing Connector Terminals in Wiring Systems.

Did you find and correct the condition?

Go to Step 9

Go to Step 5

5
  1. Inspect for poor connections at the PCM for the CKP sensor circuits.
  2. If you find a poor connection, repair the terminal as necessary. Refer to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 9

Go to Step 6

6

  1. Remove the CKP sensor. Refer to Crankshaft Position Sensor Replacement .
  2. Inspect the CKP sensor for signs of damage.
  3. If the CKP sensor is damaged, refer to Crankshaft Position Sensor Replacement .

Did you find and correct the condition?

Go to Step 9

Go to Step 7

7

  1. Inspect the CKP reluctor wheel for damage.
  2. If you find the CKP reluctor wheel damaged, refer to Camshaft and Bearings Cleaning and Inspection Engine Mechanical- 5.7L.

Did you find and correct the condition?

Go to Step 9

Go to Step 8

8

Replace the CKP sensor. Refer to Crankshaft Position Sensor Replacement .

Did you find and correct the condition?

Go to Step 9

--

9
  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 10

Go to Step 2

10

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