P250A
Engine Oil Level Sensor Circuit
General electrical fault on the engine oil level sensor circuit. The ECM cannot read a plausible level signal (analog level, ultrasonic or capacitive sender). Without a valid level reading the ECM disables oil-low warnings and dynamic service-interval calculation.
- Check engine light: Not always
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Open or shorted wiring to the sensorCommon
- Corroded connector at the oil panPossible
Parts involved
- Oil Level Sensor
- Sensor Wiring
P250A 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.