DTC P0117-00: ECT Sensor No. 1 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 P0117:00 (PCM, SKYACTIV-G) DETECTION CONDITION AND POSSIBLE CAUSE
| System malfunction location |
ECT sensor No. 1 circuit low input |
| Detection condition |
- The PCM monitors the ECT sensor No. 1 signal. If the PCM detects that the ECT sensor No. 1 voltage at the PCM terminal 1AH is below 0.23 V for 5 s, the PCM determines that the ECT sensor No. 1 circuit has a malfunction.
|
| Fail-safe |
- Fixes the water temperature for the engine control at 40°C {104°F}, and for the idle air control at 80°C {176°F}.
- Operates the cooling fan (high speed rotation).
- Inhibits the fuel cut control during shift change.
|
| Possible cause |
- Engine overheating (cooling system malfunction)
- ECT sensor No. 1 connector or terminals malfunction
- ECT sensor No. 1 malfunction
- Short to ground in ECT sensor No. 1 signal circuit
- PCM connector or terminals malfunction
- Short circuit in ECT sensor No. 1 signal circuit and ground circuit
- PCM malfunction
|
 Courtesy of MAZDA MOTORS CORP.
|