DTC Summary
WARNING: This page is about a different car, the 2019 Toyota Highlander, 2018 Toyota Highlander, and 2017 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
|---|---|---|---|---|---|
| P1420 | Evaporative Emission Canister Small Leak | Leak detection pump creates negative pressure (vacuum) in EVAP system and EVAP system pressure is measured. Reference pressure is measured at the start and at the end of leak check. If stabilized pressure is higher than second reference pressure, ECM determines that EVAP system has a small leak. |
|
Comes on | DTC stored |
| P1421 | Evaporative Emission Canister Gross Leak | Leak detection pump creates negative pressure (vacuum) in EVAP system and EVAP system pressure is measured. Reference pressure is measured at the start and at the end of leak check. If stabilized pressure is higher than [second reference pressure x 0.2], ECM determines that EVAP system has a large leak. |
|
Comes on | DTC stored |
| DTC No. | Monitoring Item | Detection Timing | Detection Logic |
|---|---|---|---|
| P1420 | Canister small leak | EVAP monitoring (Power switch off) |
2 trip |
| P1421 | Canister gross leak |