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.
OBD-II Drive Cycle Description
EVAP monitor will not activate if ambient air temperature outside is not 40-100°F (4-38°C), or vehicle is above 8000 feet. If DTC P1000 has to be cleared when ambient air temperature outside is not 40-100°F (4-38°C), or vehicle is above 8000 feet, PCM must detect these conditions once (twice on some models) before EVAP monitor can be "by-passed" and DTC P1000 will clear. Perform EVAP MONITOR "BY-PASS" PROCEDURE.
All OBD-II drive cycles must be performed using scan tool. Consult scan tool manufacturers instruction manual for drive cycle procedure. Vehicle should be driven at steady speeds during cruise or acceleration to help complete OBD-II monitors. Operate engine throttle in a steady fashion to minimize time required for monitor completion. EVAP monitor only operates during first 30 minutes of engine run time. If performing EVAP monitor procedure, drive vehicle at a steady rate and at part throttle to minimize possible "fuel slosh".
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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.