P0336

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

If the PCM detects that the CKP sensor is inconsistent for less than 2 seconds.

DTC Descriptors

This diagnostic procedure supports the following DTC. DTC P0336 Crankshaft Position (CKP) Sensor Performance

Conditions for Running the DTC

- The engine speed is more than 400 RPM.

- The ignition voltage is between 5-17 volts.

- DTC P0336 runs continuously once the above conditions are met.

Conditions for Setting the DTC

The PCM determines that the CKP sensor signal is for less than 1 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.


Test Description

DTC P0336 Steps 1-2:

DTC P0336 Steps 3-10:

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

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

6. 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.

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