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
/Performance Problem P0452 (91) Fuel Tank Pressure (FTP) Sensor Circuit Low Voltage P0453 (91) Fuel Tank Pressure (FTP) Sensor Circuit High Voltage P0455 (90) Evaporative Emission (EVAP) System Large Leak Detected P0456 (90) Evaporative Emission (EVAP) System Very Small Leak Detected P0457 (90) Evaporative Emission (EVAP) System Leak Detected/Fuel Fill Cap Loose or Missing P0496 (92) Evaporative Emission (EVAP) System High Purge Flow Detected P0497 (90) Evaporative Emission (EVAP) System Low Purge Flow Detected P0498 (117) Evaporative Emission (EVAP) Canister Vent Shut Valve Circuit Low Voltage P0499 (117) Evaporative Emission (EVAP) Canister Vent Shut Valve Circuit High Voltage P1454 (91) Fuel Tank Pressure (FTP) Sensor Range/Performance Problem P2422 (117) Evaporative Emission (EVAP) Canister Vent Shut Valve Stuck Closed Malfunction
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.