DTC Setting Condition
| Item | DTC setting condition |
|---|---|
| Main Action | abnormal sensor performance |
| Prerequisite Condition | Vehicle speed 25 MPH (40 km/h) or higher Atmospheric Pressure 75 kPa or more Upstream oxygen sensor preparation state (Oxygen sensor tip temperature 800°C or more, heating time 30 seconds or more after dew point) Downstream oxygen preparation state (Oxygen sensor tip temperature 730°C or more, heating time 75 seconds or more after dew point) Difference between target lambda and actual lambda less than 0.25 Cooling water temperature over 56°C Model catalyst temperature 560 ~ 940°C Engine speed RPM 1056 - 3296RPM Engine load 26 ~ 31% or more, 87 ~ 100% or less (intake air amount 140 ~ 470mg/stroke) Stable driving conditions (the difference between the actual engine speed and the filtered engine speed is 160 RPM or less, the difference between the actual intake air volume and the filtered intake air volume is 60 mg/stroke or less, the difference between the actual lambda and the filtered lambda is 7% or less, the integrated intake air volume more than 7g) The Downstream oxygen sensor voltage is 0.7V or more Integrated intake air volume 10g or more Lambda (rich ↔ lean) active state |
| Trouble Determination | When the ratio of the amplitude of the slow air-fuel ratio signal to the measured amplitude of the air-fuel ratio signal is greater than 1.0 |
| Diagnosis Time | 25 seconds |
| Threshold Value for Warning Light | 2nd drive cycle |