P250B
Engine Oil Level Sensor Circuit Range/Performance
The oil level sensor is electrically intact, but the level reading is implausible — for example a constant value across drives, jumps that cannot match real oil consumption, or readings outside the design range. Often a contaminated or aged float/ultrasonic sender.
- Check engine light: Not always
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Aged or contaminated senderCommon
- Foaming oil under high RPM masking the levelPossible
- Sensor element aged beyond calibration windowLess likely
Parts involved
- Oil Level Sensor
P250B is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.