What does code P055D mean?

Q: What does code P055D mean?

Engine Oil Pressure Sensor/Switch B High. P055D indicates that the engine control module has detected an abnormally high signal from the 'B' engine oil pressure sensor or switch circuit, meaning the reported oil pressure is above the expected range for current operating conditions. The computer compares this input against a calibrated threshold and sets the code when the voltage or pressure reading stays too high for a defined period.

DTC codes / P05xx · Vehicle speed, idle control and auxiliary inputs / P055D

P055DEngine Oil Pressure Sensor/Switch B High

P055D indicates that the engine control module has detected an abnormally high signal from the 'B' engine oil pressure sensor or switch circuit, meaning the reported oil pressure is above the expected range for current operating conditions. The computer compares this input against a calibrated threshold and sets the code when the voltage or pressure reading stays too high for a defined period.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

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.