P0336Powertrain
Powertrain · SAE
CKP Sensor — Range/Performance
Meaning
The engine control module has detected that the crankshaft position (CKP) sensor signal exhibits frequency, amplitude, or pulse-pattern values outside calibrated limits. The signal is present but does not correlate with the expected rotational speed or reference signal.
Common causes
- Damaged or defective reluctor wheel (missing or deformed teeth)
- Faulty CKP sensor or incorrect air gap
- CKP sensor wiring with abnormal resistance, short circuit, or intermittent open
- Electromagnetic interference on the sensor circuit
- Dirt, oil, or debris covering the sensor or reluctor wheel
- Excessive crankshaft end-play or drivetrain issue
Symptoms
- Check-engine light (MIL) illuminated
- Hard start or intermittent no-start
- Rough idle or misfires while driving
- Power reduction or erratic engine behavior
- Possible torque-limiting or limp-home mode activation
Severity
High: an unreliable CKP signal compromises ignition timing and fuel injection calculations, risking engine damage or loss of propulsion.
What to do
- Read live data to compare CKP speed with CMP sensor and tachometer readings
- Visually inspect the reluctor wheel for missing, deformed, or debris-covered teeth
- Measure the air gap between sensor and reluctor wheel against manufacturer specifications
- Check continuity, resistance, and insulation of the CKP sensor wiring
- Replace the CKP sensor if wiring and reluctor wheel are found serviceable