The OBD-II drive cycle purpose is to execute OBD-II monitors and identify any concerns with the OBD system. DTC P1000 will be erased of all OBD-II monitors that have completed during OBD-II drive cycle. Obey all traffic laws during execution of OBD-II drive cycle. Use scan tool to observe status of each OBD-II monitor at completion of OBD-II drive cycle.

OBD-II Drive Cycle Recommendations

Most OBD-II monitors will complete more readily driving with a "steady throttle" during acceleration or cruise modes. Smooth throttle operation will minimize the time required for monitor completion. Fuel tank level should be 1/2 to 3/4, with 3/4 being the optimum desired level. The evaporative monitor may only operate during the first 30 minutes of engine operation. When executing the evaporative monitor, stay in part throttle and drive steadily to avoid fuel slosh.

Vehicle Preparation

Connect scan tool to DLC. Verify the following PIDs:
- IAT PID 40-100°F (4-38°C)
- Fuel Level Input (FLI) PID 50-75 Percent
- ECT PID Minimum Of 170°F (77°C)
Without returning to key off, using scan tool, clear all DTCs. DTC P1000 will remain. Using scan tool, view status of OBD-II monitors. Proceed to OBD-II DRIVE CYCLE PROCEDURE if necessary or proceed to identified monitor drive cycle. See MONITOR REPAIR VERIFICATION DRIVE CYCLES .

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.

Safety Warning

OBD-II Drive Cycle: Notes

Use the Manual With the Right Hardware

When to See a Mechanic

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