Engine Oil Pressure Out Of Range Test

The pressure of the engine oil is monitored to ensure proper engine operation and avoid engine damage. If abnormal engine oil pressure is observed with a properly functioning EOP sensor, then an appropriate DTC (either P0524 or P055F) is set and a FMEM (Failure Mode Effective Management) action is invoked.

If the oil pressure does not increase sufficiently when the engine starts, a P0524 DTC is set. In addition, during engine operation, if the oil pressure drops below the minimum level required for internal engine protection for a calibrated period of time (normally, 5 seconds), or if the oil pressure indicated by the sensor is substantially lower than modeled oil pressure, or if there is insufficient oil pressure to operate the Variable Cam Timing system, then a P0524 is set. If oil pressure exceeds a maximum level for a calibrated period of time, (normally, 5 seconds), then a P055F is set.