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 1AN 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 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 E and PCM terminal 1AN Open circuit in wiring harness between the following terminals: Engine oil temperature sensor/engine oil pressure sensor terminal E-PCM terminal 1AN Engine oil temperature sensor/engine oil pressure sensor terminal C-PCM terminal 1AB Engine oil temperature sensor malfunction PCM malfunction
Courtesy of MAZDA MOTORS CORP.