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 Monitor Repair Verification Drive Cycle
Ensure vehicle inlet air temperature (IAT) PID is 14-102°F (-10-38°C) and fuel level (FLI) PID is 15-85 percent. monitor period will be during 4-10 minutes after engine is started. System test takes at least 30 seconds during this time. If time exceeds 10 minutes, turn ignition off and restart test. Cold soak vehicle for 8 hours. Connect scan tool. Turn all accessories off. Start engine. Accelerate to 35-65 MPH within 4 minutes. Drive vehicle at 35-65 MPH for at least 2 minutes. Stop vehicle and allow to idle for 20 seconds. Using scan tool, check drive mode completion status. If test is not complete, repeat test from engine start. If test is complete, check test results. If results are okay, ensure no DTCs are present. If results are not okay, repairs are not complete.
To bypass 8 hour timer, cool fuel tank as much as possible. Connect scan tool. Access CLEAR DIAGNOSTIC CODES. Press TRIGGER to reset timer. Leave ignition on. Perform drive mode test.
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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.