P0336

DTC P0336

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provide an overview of each diagnostic category.

DTC Descriptor
DTC P0336
- Crankshaft Position (CKP) Sensor Performance

Diagnostic Fault Information





Typical Scan Tool Data





Circuit/System Description

The hall effect crankshaft position (CKP) sensor signal indicates the crankshaft speed and position. There are 57 teeth on the front of the crankshaft sprocket, plus a sync gap. The CKP sensor will output an ON/OFF pulse as each tooth passes the sensing element. The CKP sensor is connected directly to the engine control module (ECM) by the following circuits:

* The 5-volt reference circuit
* The low reference circuit
* The signal circuit

Conditions for Running the DTC

* The engine is cranking or running.
* DTC P0336 runs continuously when the above condition is met.
* DTCs P0642 or P0643 are not set.

Conditions for Setting the DTC

The ECM detects CKP sensor pulses that are more than 0 but not equal to 57 teeth, and a sync gap per one crankshaft revolution.

Action Taken When the DTC Sets

DTC P0336 is a Type A DTC.

Conditions for Clearing the MIL/DTC

DTC P0336 is Type A DTC.

Reference Information
Schematic Reference

Engine Controls Schematics (Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Diagnostic Trouble Code Descriptions)
Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information

Circuit/System Verification

1. If DTCs P0642 or P0643 are set, diagnose those DTCs first.
2. The engine starts and runs.
3. Engine running, observe the DTC information with a scan tool. DTC P0336 should not set.
4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

1. Ensure that the CKP sensor circuits are not routed too closely to the fuel injector wiring after-market add-on electrical equipment, solenoids, relays or motors.
2. Ignition OFF, inspect the CKP sensor for correct installation.

• If the sensor is loose, inspect the sensor and the O-ring for damage, replace as necessary.

Important: Refer to Inducing Intermittent Fault Conditions (Component Tests and General Diagnostics) for additional instructions on inducing intermittent conditions.

3. Engine running, observe the CKP Sensor Signal Present parameter of the scan tool while manipulating the related harnesses, connectors, and wires of the CKP sensor. The parameter should display Yes.

• If the parameter displays No or fluctuates between Yes and No, inspect the related harness, connector, or wire for damage or poor connectivity at or near the point of the manipulation. Repair or replace as necessary.

4. Inspect the engine for the following conditions:

* The engine oil for debris
* The crankshaft reluctor wheel for damage or foreign material passing between the sensor and reluctor wheel
* The timing chain, tensioner, and sprockets for wear or damage

5. If no other condition is found, replace the CKP sensor.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Crankshaft Position Sensor Replacement (Service and Repair)
* Crankshaft Reluctor and Oil Pump Drive Gear Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for ECM replacement, setup, and programming