DTC Detection Logic
To judge the malfunction of A/F sensor 1, 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) |
The response time of a A/F sensor 1 signal delays more than the specified time computed by ECM. |
|
| P014D | A/F SENSOR1 (B1) (O2 sensor slow response - lean to rich bank 1 sensor 1) |