DTC P0054-00: Ho2S Heater Resistance (Us): 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 P0054:00 (PCM, SKYACTIV-G, US) DETECTION CONDITION AND POSSIBLE CAUSE
| System malfunction location |
HO2S heater resistance |
| Detection condition |
- When the PCM controls the HO2S heater, the HO2S element resistance input to the PCM is the specified value or more.
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| Fail-safe |
- Stops fuel feedback control of HO2S
|
| Possible cause |
- HO2S connector or terminals malfunction
- F8 15 A fuse malfunction
- Short to ground in HO2S heater power supply circuit
- Open circuit in HO2S heater power supply circuit
- HO2S heater malfunction
- PCM connector or terminals malfunction
- Open circuit in HO2S heater control circuit
- Short to ground in HO2S heater control circuit
- PCM malfunction
|
 Courtesy of MAZDA MOTORS CORP.
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