| DESCRIPTION |
HO2S circuit low input |
| DETECTION CONDITION |
Determination conditions |
- A condition in which the HO2S input voltage is less than the specified value continues for the specified period.
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| Preconditions |
- HO2S is activated.
- The following DTCs are not detected:
- MAF sensor: P0102:00, P0103:00
- ECT sensor: P0117:00, P0118:00
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| Malfunction determination period |
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| Drive cycle |
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| Self test type |
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| Sensor used |
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| FAIL-SAFE FUNCTION |
- Fixes duty value of A/F sensor heater
- Stops fuel feedback control of A/F sensor
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| VEHICLE STATUS WHEN DTCs ARE OUTPUT |
- Illuminates check engine light.
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| POSSIBLE CAUSE |
- 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 the following terminals:
- HO2S terminal A-PCM terminal 2AI
- HO2S terminal B-PCM terminal 2AG
- HO2S malfunction
- PCM malfunction
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