Code Definition

P250B — Engine Oil Level Sensor Circuit Range/Performance

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P250B

P250B is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P250B is stored, the module has detected a plausibility fault — the measured value is in the electrical range but is not consistent with expected operating behaviour; and a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P250B is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The PCM monitors the engine oil level sensor circuit for proper voltage and resistance values. Code P250B is set when the PCM detects out-of-range voltage or resistance within the engine oil level sensor circuit, or a performance problem is detected. The oil level sensor is typically located on or inside the engine oil pan and is used to monitor the oil level to ensure internal engine components are properly lubricated. When this code is set, the oil level may not be displayed on the instrument cluster.

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