Details On DTCs
WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
DETECTION CONDITION AND POSSIBLE CAUSE
| DESCRIPTION |
HO2S circuit no activity detected |
| DETECTION CONDITION |
Determination conditions |
- With the estimated temperature of the HO2S element exceeding the specified value, a condition in which the HO2S signal voltage is less than the specified value continues for the specified period.
|
| Preconditions |
- Battery voltage: above 11 V
- The following DTCs are not detected:
- HO2S: P0137:00, P0138:00
- ECT sensor No. 1: P0117:00, P0118:00
- MAF sensor: P0101:00, P0102:00, P0103:00
|
| Drive cycle |
|
| Self test type |
|
| Sensor used |
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| FAIL-SAFE FUNCTION |
|
| VEHICLE STATUS WHEN DTCs ARE OUTPUT |
- Illuminates check engine light.
|
| POSSIBLE CAUSE |
- HO2S signal line error
- HO2S connector or terminals malfunction
- PCM connector or terminals malfunction
- Short to ground in wiring harness between HO2S terminal A and PCM terminal 2AI
- Open circuit in wiring harness between HO2S terminal A and PCM terminal 2AI
- HO2S loose
- HO2S malfunction
- Exhaust gas leakage from exhaust system (between A/F sensor and HO2S)
- Insufficient engine compression
- HO2S heater malfunction
- PCM malfunction
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