DTC P0197-00: Engine Oil Temperature Sensor Circuit Low Input: Outline
WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0197:00 (PCM, SKYACTIV-G) DETECTION CONDITION AND POSSIBLE CAUSE
| System malfunction location |
Engine oil temperature sensor circuit low input |
| Detection condition |
- The PCM monitors the input signal from the engine oil temperature sensor. If the voltage from the engine oil temperature sensor is below 0.21 V for 4 s, the PCM determines that the engine oil temperature sensor circuit has a malfunction.
Precondition
- Battery voltage: 8-20 V
- 0.5 s have elapsed after the ignition was switched ON (engine off or on)
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| Fail-safe |
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| Possible cause |
- Engine oil temperature sensor/engine oil pressure sensor connector or terminals malfunction
- Engine oil temperature sensor malfunction
- Short to ground in engine oil temperature sensor signal circuit
- PCM connector or terminals malfunction
- Short circuit in engine oil temperature sensor signal circuit and ground circuit
- PCM malfunction
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 Courtesy of MAZDA MOTORS CORP.
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