P0336
DTC P0336
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.
DTC Descriptor
DTC P0336
- Crankshaft Position Sensor Performance
Diagnostic Fault Information
Circuit/System Description
The crankshaft position sensor circuits consist of an engine control module (ECM) supplied 5 V reference circuit, low reference circuit and an output signal circuit. The crankshaft position sensor is an internally magnetic biased digital output integrated circuit sensing device. The sensor detects magnetic flux changes between the peaks and valleys of a 58-tooth reluctor wheel on the crankshaft. Each tooth on the reluctor wheel is spaced at 60-tooth spacing, with 2 missing teeth for the reference gap. The crankshaft position sensor produces an ON/OFF DC voltage of varying frequency, with 58 output pulses per crankshaft revolution. The frequency of the crankshaft position sensor output depends on the velocity of the crankshaft. The crankshaft position sensor sends a digital signal, which represents an image of the crankshaft reluctor wheel, to the ECM as each tooth on the wheel rotates past the crankshaft position sensor. The ECM uses each crankshaft position signal pulse to determine crankshaft speed and decodes the crankshaft reluctor wheel reference gap to identify crankshaft position. This information is then used to sequence the ignition timing and fuel injection events for the engine. The ECM also uses crankshaft position sensor output information to determine the crankshaft relative position to the camshaft, to detect cylinder misfire, and to control the camshaft position actuator if equipped.
Conditions for Running the DTC
* DTC P0101, P0102, P0103, P0641, or P0651 is not set.
* The engine is cranking or running.
* The airflow into the engine is greater than 3 g/s.
* The DTCs run continuously when the above conditions are met.
Conditions for Setting the DTC
Note: The ECM detects engine movement by sensing the airflow through the MAF sensor, when airflow is greater than 3 grams per second, or by sensing camshaft position sensor pulses.
* The ECM detects that the engine is running, but receives less than 53 or more than 63 crankshaft position sensor pulses, during each engine revolution, for 8 of 10 engine revolutions.
* The ECM detects that the engine is running, but more than 25 crankshaft resyncs have occurred within 20 s.
* The ECM detects that the engine has been running, but the crankshaft does not sync for 0.4 second.
Action Taken When the DTC Sets
* DTC P0336 is a Type A DTC.
* The camshaft position actuator, if equipped, is commanded to the parked position.
* The ignition system defaults to a limp home mode. The camshaft position sensor is used to determine engine position.
Conditions for Clearing the DTC
DTC P0336 is a Type A DTC.
Diagnostic Aids
* With this DTC set, the engine may crank for an extended period of time during start-up.
* This test procedure requires that the vehicle battery has passed a load test and is completely charged. Refer to Battery Inspection/Test (Component Tests and General Diagnostics).
Reference Information
Schematic Reference
Engine Controls Schematics ([1][2]Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Electronic Ignition System Description (Electronic Ignition System Description)
Electrical Information Reference
* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Powertrain Diagnostic Trouble Code (DTC) Type Definitions)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Special Tools
J 35616-A/BT-8637 - Connector Test Adapter Kit
Circuit/System Verification
1. Engine idling, observe the scan tool Crankshaft Position Active Counter parameter. The parameter should be incrementing.
2. Engine idling, observe the DTC information with a scan tool. DTC P0336 should not set.
3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not set. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
Note: You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.
1. Ignition OFF, inspect the crankshaft position sensor for looseness and correct installation.
• If the crankshaft position sensor is loose, inspect the sensor and the O-ring for damage, replace as necessary.
2. Inspect the engine for the following conditions:
* Engine oil for debris and contamination
* Crankshaft reluctor wheel for damage
* The timing chain, tensioner, and sprockets for wear or damage
• If debris is found in the engine oil, inspect the internal engine components to determine the cause. Repair or replace any worn or damaged components.
Component Testing
Note: You must perform the Circuit/System Testing before proceeding with Component Testing.
1. Inspect the crankshaft position sensor for correct installation. Remove the crankshaft position sensor from the engine and inspect the sensor O-ring for damage.
• If the sensor is loose, incorrectly installed, or damaged, replace the crankshaft position sensor.
2. Connect the crankshaft position sensor harness connector to the crankshaft position sensor.
3. Ignition ON, engine OFF. Observe the Crankshaft Position Active counter parameter on the scan tool.
4. Pass a flat steel object across the tip of the sensor repeatedly. The Crankshaft Position Active counter parameter should increment with each pass of the steel object.
• If the parameter does not increment, replace the crankshaft position sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Crankshaft Position Sensor Replacement (Service and Repair)
* Engine Control Module Programming and Setup (RPO LMM) (Testing and Inspection)Engine Control Module Programming and Setup (Gasoline Engines) (Testing and Inspection)
* Engine Control Module Replacement (Service and Repair)