Trouble codes › P0339
P0339 Crankshaft Position Sensor "A" Circuit Intermittent
Engine timing
P0339 means the crankshaft position sensor's signal drops out now and then, often a sensor failing when hot.
The crankshaft position sensor signal is dropping out now and then. It's often a sensor failing when hot, or a loose connection.
The engine may stall without warning, which is dangerous in traffic. Get it fixed before relying on the vehicle.
Common causes
- A crankshaft sensor failing intermittently (often heat-related)
- A loose or corroded connector
- Chafed wiring
Symptoms
- Random stalling, especially when hot
- Restarts after cooling down
- Tachometer dropping to zero momentarily
Known problems: Nissan 2.5L crankshaft and camshaft sensor stalling
What to check first
- Wiggle the connector and wiring with the engine running and watch for stumbles.
- Inspect the connector for corrosion and loose pins.
- Note whether stalling happens mostly when hot: that points to the sensor.
- Replace the sensor with a quality part.
What does P0339 mean on your vehicle?
The likely cause depends on your engine. iRepair researches your exact year, make, model and engine (service bulletins, recalls and owner reports) and tells you what to check first. Your first 3 questions are free.
Ask iRepair about P0339No scanner? Most auto parts stores read check-engine codes for free.
Related codes
General guidance for P0339 on most vehicles. Some makers use the same code a little differently; confirm in the service information for your vehicle, put safety first, and see a professional when in doubt.