P250AEngine Oil Level Sensor Circuit
- Generic OBD-II code · Powertrain
- How the car detects it
- P250A is the general circuit code for the engine oil level sensor, a unit in the sump that today mostly measures by heated element or ultrasound and often reports oil temperature as well. Its use varies. GM's 2018 preliminary information for several trucks, SUVs and V8 cars lists P250A among codes caused by a jumper harness chafed near connector X154 on the front cover. Mazda tells technicians that on the 2016–2017 CX-9 an oil warning lamp with P250A can simply come from overfilled oil, so the level must be checked first. Deutz's EMR controller files a ground fault of the level sensor as P250A-F0. Specific low, high and erratic signals are P250C to P250E, a genuinely low level P250F.
- What you may notice
- Oil level warning or message in the cluster
- Oil level display missing or wrong
- With harness damage, further engine codes and stalling (GM)
- Likely causes
- LikelySensor harness chafed or pinched (GM X154 jumper harness)
- PossibleEngine oil overfilled, sensor reading out of range (Mazda CX-9)
- PossibleOil level sensor defective or leaking at its seal
- RareCorroded or oily connector at the sump
- Repair
- Medium · Often possible to do yourself.Typical cost: €0 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.