OBD-II · Engine and powertrain (P)
P0339
Crankshaft position sensor A circuit intermittent
What it means
The crankshaft signal drops out briefly.
Symptoms
- engine cranks but will not start
- engine cuts out, often when hot, and may restart after cooling
- rev counter drops to zero or jumps
- engine warning light
Likely causes, most likely first
| No. | Cause |
|---|---|
| 01 | loose or corroded connector |
| 02 | chafed wiring |
| 03 | sensor failing when hot |
| 04 | loose sensor mounting |
What to check, step by step
- 01Wiggle-test the connector and wiring while the engine is running
- 02Check the wiring for chafing against the engine or exhaust
- 03Check that the sensor is tight and the tip is clean
- 04Replace the sensor if dropouts continue, especially if they happen when hot