DTC P0054-00: Ho2S Heater System: Resistance Error
WARNING: This page is about a different variant/trim than selected.
P0054:00 (PCM - VIN Y) DETECTION CONDITION AND POSSIBLE CAUSE
| System malfunction location |
HO2S heater system: Resistance error |
| Detection condition |
- When the PCM controls the HO2S heater, the HO2S element resistance input to the PCM is the standard or more.
|
| Fail-safe |
- Stops fuel feedback control of HO2S.
|
| Possible cause |
- Malfunction in wiring harness (including connector/terminal) between sub relay and HO2S (see CIRCUIT INSPECTION
.) (see CONNECTOR INSPECTION
.)
- Malfunction in wiring harness (including connector/terminal) between HO2S and PCM (see CIRCUIT INSPECTION
.) (see CONNECTOR INSPECTION
.)
- HO2S malfunction (HO2S heater malfunction) (Refer to applicable HEATED OXYGEN SENSOR (HO2S) INSPECTION (VIN Y)
in the service information.)
- PCM malfunction (Refer to applicable PCM REMOVAL/INSTALLATION (VIN Y)
in the service information.)
|
| Repeatability verification procedure |
- Clear the DTC recorded in the memory. (see CLEARING DTC
.)
- Perform the KOER self test. (See DTC INSPECTION
.)
|
 Courtesy of MAZDA MOTORS CORP.
|
| 1 |
Battery |
| 2 |
Sub relay |
| 3 |
HO2S (HO2S heater) |
| 4 |
PCM |