P0339Crankshaft Position Sensor A Circuit Intermittent
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P0339 means the crankshaft position signal drops out or is disturbed for moments and then recovers. Ford's 2020–2023 petrol engines use it, depending on the engine, instead of P0320 for tooth errors: wrong tooth count after the gap, tooth time outside 30 to 9,000 rpm, gap at an unexpected position, from 500 rpm, detected within 5 s. In Ford's PCM code list (Roush workshop manual) P0339 is listed without check engine light. Saab's 9-3 diesel (T8) counts dropouts: more than 8 within 10 ms over 3 s, or more than 3 in a whole drive cycle. Honda recalled 2023 Accord Hybrids because a mis-machined sensor mounting caused no-start, rough idle, hunting idle and P0017 with P0339. Typical causes are a loose contact, a sensor failing when hot and a wrong air gap.
- What you may notice
- Sporadic jerking or misfire
- Brief stalling, hunting idle
- Hard starting
- Check engine light on (not on all Ford engines)
- Likely causes
- LikelyLoose contact or corrosion at the sensor connector or an in-line connector
- PossibleSensor dropping out when hot
- PossibleSensor mounting or air gap mechanically wrong (machining error, bracket)
- RareElectrical interference
- RareTone wheel slightly damaged
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €40 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.