DTC P0198-00: Engine Oil Temperature Sensor Circuit High Input: Notes

DTC P0198:00 DETECTION CONDITION AND POSSIBLE CAUSE

DTC P0198:00	Engine oil temperature sensor circuit high input
DETECTION CONDITION	The PCM monitors the engine oil temperature sensor signal. If the PCM detects that the engine oil temperature sensor voltage at the PCM terminal 1AU is above 4.95 V for 4 s, the PCM determines that the engine oil temperature sensor circuit has a malfunction. 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	Not applicable
POSSIBLE CAUSE	Engine oil pressure sensor/engine oil temperature sensor connector or terminals malfunction PCM connector or terminals malfunction Short to power supply in wiring harness between engine oil pressure sensor/engine oil temperature sensor terminal E and PCM terminal 1AU Open circuit in wiring harness between the following terminals: Engine oil pressure sensor/engine oil temperature sensor terminal E-PCM terminal 1AU Engine oil pressure sensor/engine oil temperature sensor terminal C-PCM terminal 1AW Engine oil temperature sensor malfunction PCM malfunction
Courtesy of MAZDA MOTORS CORP.