What does code P252B mean?

Q: What does code P252B mean?

Engine Oil Quality Sensor Circuit Range/Performance. P252B indicates that the powertrain control module has detected an out-of-range or erratic signal from the engine oil quality sensor circuit, which is used to estimate oil life and condition. The computer compares the sensor's output against expected values and flags this code when the signal falls outside the valid range or does not change as expected during monitoring.

DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P252B

P252BEngine Oil Quality Sensor Circuit Range/Performance

P252B indicates that the powertrain control module has detected an out-of-range or erratic signal from the engine oil quality sensor circuit, which is used to estimate oil life and condition. The computer compares the sensor's output against expected values and flags this code when the signal falls outside the valid range or does not change as expected during monitoring.

SystemPowertrain

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.