Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provide an overview of each diagnostic category. |
DTC Descriptor
DTC P0336: Crankshaft Position (CKP) Sensor PerformanceDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
CKP 5-Volt Reference Voltage | P0642 | P0335, P0336 | P0643 | P0336 |
CKP Sensor Signal | P0335, P0336 | P0335, P0336 | P0335, P0336 | P0336 |
CKP Low Reference | -- | P0335, P0336 | -- | P0336 |
Typical Scan Tool Data
Circuit | Normal Range | Short to Ground | Open | Short to Voltage |
|---|---|---|---|---|
Operating Conditions: Engine Running | ||||
CKP 5-Volt Reference Voltage | Yes | No | No | No |
CKP Sensor Signal | Yes | No | No | No |
CKP Low Reference | Yes | -- | No | No |
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
Connector End View Reference
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- If DTCs P0642 or P0643 are set, diagnose those DTCs first.
- The engine starts and runs.
- Engine running, observe the DTC information with a scan tool. DTC P0336 should not set.
- 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
- 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.
- Ignition OFF, inspect the CKP sensor for correct installation.
- 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.
- Inspect the engine for the following conditions:
- If no other condition is found, replace the CKP sensor.
| ⇒ | If the sensor is loose, inspect the sensor and the O-ring for damage, replace as necessary. |
Important: Refer to Inducing Intermittent Fault Conditions for additional instructions on inducing intermittent conditions.
| ⇒ | 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. |
| • | 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 |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for ECM replacement, setup, and programming |
