DTC Summary
DTC DETECTION CONDITION CHART
| DTC No. | Monitoring Item | DTC Detection Condition | Trouble Area | Detection Timing | Detection Logic |
|---|---|---|---|---|---|
| P1420 | EVAP small leak | Vacuum pump creates negative pressure (vacuum) in EVAP system and EVAP system pressure is measured. 0.02 inch leak pressure standard is measured at the start and at the end of leak check. If stabilized pressure is higher than second 0.02 inch leak pressure standard, ECM (Included in HV control ECU) determines that EVAP system has a small leakage. |
|
While ignition switch off | 2 trips |
| P1421 | EVAP gross leak | Vacuum pump creates negative pressure (vacuum) in EVAP system and EVAP system pressure is measured. 0.02 inch leak pressure standard is measured at the start and at the end of leak check. If stabilized pressure is higher than [second 0.02 inch leak pressure standard x 0.2], ECM (Included in HV control ECU) determines that EVAP VSV stuck open | Same above | While ignition switch off | 2 trips |