| Detection Criteria | Threshold |
|---|---|
| Signal fluctuation (noise) monitoring | |
| Occasions sensor output changes +/-0.7 kpa (5 mmHg) or more for 5 to 15 seconds after idling and vehicle stop | 7 times or more |
| No signal change (stuck) monitoring | |
| No fuel tank pressure change time (less than 0.138 kpa 0.02 mmHg change after engine start) | 20 min or more |
TYPICAL MALFUNCTION THRESHOLDS