Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
EVAP system: Notes
| DTC No. | Monitoring items | Refer to |
|---|---|---|
| P0441 | Purge flow | |
| P0451 | Difference in pressure between canister pressure sensor (integrated into canister pump module) and air pressure sensor | |
| P0452 | Canister pressure sensor (integrated into canister pump module) voltage LOW | |
| P0453 | Canister pressure sensor (integrated into canister pump module) voltage HIGH | |
| P0455 | Large leak from EVAP | |
| P0456 | Small leak from EVAP | |
| P0458 | Purge VSV voltage LOW | |
| P0459 | Purge VSV voltage HIGH | |
| P1449 | Clogged air filter (integrated into canister pump module) | |
| P1451 | Clogged pipe | |
| P2404 |
|
|
| P2401 | Leak detection pump stuck OFF (integrated into canister pump module) | |
| P2402 | Leak detection pump stuck ON (integrated into canister pump module) | |
| P2419 | Closing of vent valve stuck (integrated into canister pump module) or not | |
| P2420 | Opening of vent valve stuck (integrated into canister pump module) or not | |
| P2610 | Soak timer (integrated into ECM) |
When the DTCs related to the EVAP system have been stored, the malfunctioning section can be located using the table below.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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