What does P0339 mean?
The crankshaft position (CKP) sensor reads a toothed wheel on the crankshaft. The computer uses it for engine speed, spark and injection timing. Without it, most engines will not run.
The signal drops out or jumps for short periods.
Codes are a starting point. They tell you which test failed, not which part to replace. Check for other stored codes and fix those in a sensible order.
Symptoms
- Engine cranks but will not start
- Stalling, often when hot
- Intermittent loss of tach signal
- Misfires or rough running
Common causes
- Loose connector
- Chafed wire
- Sensor failing when hot
How to diagnose P0339
- Wiggle-test the harness while watching live data.
- Check terminals for spread pins and corrosion.
- Check whether the tachometer moves while cranking. No movement often means no CKP signal.
- Inspect the sensor and connector for oil, damage and debris.
How to fix it
- Replace the crankshaft position sensor
- Repair wiring
- Repair the tone wheel
Estimated repair cost
Likely repairs for P0339 run from about $100 to $400, depending on the cause.
| Repair | Typical range (parts + labor) |
|---|---|
| Diagnostic fee (scan + testing) | $100 - $200 |
| Crankshaft position sensor | $120 - $350 |
| Wiring/connector repair | $100 - $400 |
These are rough US estimates for an independent shop in 2026, based on typical parts prices and standard labor times. Dealers, big trucks, luxury brands and high-cost areas often run higher. They are not quotes. Use the repair cost estimator to adjust for your vehicle.
How serious is P0339?
High severity
Not recommended. A failing crank sensor can kill the engine while you are driving.
P0339 FAQ
What does P0339 mean?
P0339 stands for "Crankshaft Position Sensor "A" Circuit Intermittent". The crankshaft position (CKP) sensor reads a toothed wheel on the crankshaft.
Can I drive with a P0339 code?
Not recommended. A failing crank sensor can kill the engine while you are driving.
How much does it cost to fix P0339?
It depends on the cause. The likely repairs for P0339 range from about $100 to $400 at an independent shop in the US, plus a diagnostic fee of roughly $100-$200. These are rough estimates; dealer prices and some vehicles run higher.
What is the most common cause of P0339?
The most common causes are: loose connector; chafed wire; sensor failing when hot.