DTC P0523-00: Engine Oil Pressure Sensor Circuit High Input: Notes

DTC P0523:00 DETECTION CONDITION AND POSSIBLE CAUSE

DTC P0523:00	Engine oil pressure sensor circuit high input
DETECTION CONDITION	If the input voltage at the PCM terminal 1AS is more than 4.7 V for 2 s, the PCM determines that the engine oil pressure sensor circuit is high. MONITORING CONDITIONS Battery voltage: 8-20 V 0.5 s have elapsed after the ignition was switched ON (engine off or on) Diagnostic support note This is a continuous monitor (CCM). The check engine light does not illuminate. FREEZE FRAME DATA is not available. Snapshot data is available. DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	Limits the engine torque or the upper limit of the engine speed.
POSSIBLE CAUSE	Engine oil temperature sensor/engine oil pressure sensor connector or terminals malfunction PCM connector or terminals malfunction Short to power supply in wiring harness between engine oil temperature sensor/engine oil pressure sensor terminal D and PCM terminal 1AS Engine oil pressure sensor power supply circuit and signal circuit are shorted to each other Open circuit in wiring harness between the following terminals: Engine oil temperature sensor/engine oil pressure sensor terminal D- PCM terminal 1AS Engine oil temperature sensor/engine oil pressure sensor terminal C-PCM terminal 1AB Engine oil pressure sensor malfunction PCM malfunction
Courtesy of MAZDA MOTORS CORP.