DTC Detection Logic
- Deterioration in A/F sensor 1 heater performance.
- The current amperage in the A/F sensor 1 heater circuit is out of the normal range.
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DTC |
CONSULT screen terms (Trouble diagnosis content) |
DTC detection condition |
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P0031 |
A/F SEN1 HTR (B1) (HO2S heater control circuit low bank 1 sensor 1) |
Diagnosis condition |
Start engine and let it idle |
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Signal (terminal) |
Voltage signal transmitted from A/F sensor 1 heater to ECM |
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Threshold |
An excessively low voltage signal is sent to ECM through the A/F sensor 1 heater |
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Diagnosis delay time |
- |
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P0032 |
A/F SEN1 HTR (B1) (HO2S heater control circuit high bank 1 sensor 1) |
Diagnosis condition |
Start engine and let it idle |
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Signal (terminal) |
Voltage signal transmitted from A/F sensor 1 heater to ECM |
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Threshold |
An excessively high voltage signal is sent to ECM through the A/F sensor 1 heater |
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Diagnosis delay time |
- |
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P0051 |
A/F SEN1 HTR (B2) (HO2S heater control circuit low bank 2 sensor 1) |
Diagnosis condition |
Start engine and let it idle |
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Signal (terminal) |
Voltage signal transmitted from A/F sensor 1 heater to ECM |
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Threshold |
An excessively low voltage signal is sent to ECM through the A/F sensor 1 heater |
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Diagnosis delay time |
- |
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P0052 |
A/F SEN1 HTR (B2) (HO2S heater control circuit high bank 2 sensor 1) |
Diagnosis condition |
Start engine and let it idle |
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Signal (terminal) |
Voltage signal transmitted from A/F sensor 1 heater to ECM |
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Threshold |
An excessively high voltage signal is sent to ECM through the A/F sensor 1 heater |
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Diagnosis delay time |
- |
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