DTC Detection Logic
WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
To judge malfunctions, this diagnosis measures response time of the A/F signal computed by ECM from the A/F sensor 1 signal. The time is compensated by engine operating (speed and load), fuel feedback control constant, and the A/F sensor 1 temperature index. Judgment is based on whether the compensated time (the A/F signal cycling time index) is inordinately long or not.
| DTC No. | CONSULT screen terms (Trouble diagnosis content) |
DTC detecting condition | Possible Cause |
|---|---|---|---|
| P014C | A/F SENSOR1 (B1) (O2 sensor slow response - rich to lean bank 1 sensor 1) |
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| P014D | A/F SENSOR1 (B1) (O2 sensor slow response - lean to rich bank 1 sensor 1) |
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| P014E | A/F SENSOR1 (B2) (O2 sensor slow response - rich to lean bank 2 sensor 1) |
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| P014F | A/F SENSOR1 (B2) (O2 sensor slow response - lean to rich bank 2 sensor 1) |
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| P015A | A/F SENSOR1 (B1) (O2 sensor delayed response - rich to lean bank 1 sensor 1) |
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| P015B | A/F SENSOR1 (B1) (O2 sensor delayed response - lean to rich bank 1 sensor 1) |
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| P015C | A/F SENSOR1 (B2) (O2 sensor delayed response - rich to lean bank 2 sensor 1) |
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| P015D | A/F SENSOR1 (B2) (O2 sensor delayed response - lean to rich bank 2 sensor 1) |