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.
Related DTCS
| DTCs | Monitoring Items | Reference |
|---|---|---|
| P043E | Reference orifice clogged (built into canister pump module) | DTC P043E, P043F: Evaporative Emission System Reference Orifice Clog Up; Evaporative Emission System Reference Orifice High Flow |
| P043F | Reference orifice high-flow (built into canister pump module) | |
| P0441 |
|
DTC P0441 Evaporative Emission Control System Incorrect Purge Flow |
| P0450 | Canister pressure sensor (built into canister pump module) voltage abnormal fluctuation | DTC P0450, P0451, P0452, P0453: Evaporative Emission Control System Pressure Sensor/Switch; Evaporative Emission Control System Pressure Sensor Range/Performance; Evaporative Emission Control System Pressure Sensor/Switch Low Input; Evaporative Emission Control System Pressure Sensor/Switch High Input |
| P0451 |
|
|
| P0452 | Canister pressure sensor (built into canister pump module) voltage low | |
| P0453 | Canister pressure sensor (built into canister pump module) voltage high | |
| P0455 | EVAP gross leak | DTC P0455, P0456: Evaporative Emission Control System Leak Detected (Gross Leak); Evaporative Emission Control System Leak Detected (Very Small Leak) |
| P0456 | EVAP small leak | |
| P2401 | Leak detection pump stuck OFF (built into canister pump module) | DTC P2401, P2402: Evaporative Emission Leak Detection Pump Stuck OFF; Evaporative Emission Leak Detection Pump Stuck ON |
| P2402 | Leak detection pump stuck ON (built into canister pump module) | |
| P2419 | Vent valve stuck closed (built into canister pump module) | DTC P2419, P2420: Evaporative Emission System Switching Valve Control Circuit Low; Evaporative Emission System Switching Valve Control Circuit High |
| P2420 | Vent valve stuck open (vent) (built into canister pump module) | |
| P2610 | Soak timer (built into ECM) | DTC P2610 ECM/PCM Internal Engine Off Timer Performance |
If any EVAP system DTCs are set, the malfunctioning area can be determined using Fig 1 .
Use the Manual With the Right Hardware
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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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