DTC P0053-00: A/F Sensor Heater Resistance
WARNING: This page is about a different variant/trim than selected.
P0053:00 (PCM - VIN Y) DETECTION CONDITION AND POSSIBLE CAUSE
| System malfunction location |
A/F sensor heater resistance |
| Detection condition |
- When the PCM controls the A/F sensor heater, the A/F sensor element resistance input to the PCM is the specified value or more.
|
| Fail-safe |
- Stops fuel feedback control
|
| Possible cause |
- Malfunction in wiring harness (including connector/terminal) between sub relay and A/F sensor heater (see CIRCUIT INSPECTION
.) (see CONNECTOR INSPECTION
.)
- Malfunction in wiring harness (including connector/terminal) between A/F sensor heater and PCM (see CIRCUIT INSPECTION
.) (see CONNECTOR INSPECTION
.)
- A/F sensor heater malfunction (Refer to AIR FUEL RATIO (A/F) SENSOR 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 |
A/F sensor heater |
| 4 |
PCM |