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.
2002 Mercury Villager BaseFACTORY OEM SERVICE PROCEDURE
PCM Reset Procedure
After a PCM reset procedure has been performed, the following events have occurred:
- All DTCs will be cleared from PCM memory.
- All freeze frame data will be cleared from PCM memory.
- Oxygen sensor test data will be cleared from PCM memory.
- OBD-II system monitor status will reset.
To perform PCM reset using scan tool, perform the following:
- Turn ignition off.
- Perform necessary vehicle preparation and visual inspections.
- Turn ignition on.
- Select vehicle and engine selection menu (optional).
- Select year, engine, model and any additional information requested by scan tool.
- Follow operating instructions from scan tool menu.
- Select DIAGNOSTIC FUNCTIONS. Press CONT button if all OBD-II System Readiness Tests (SRT) are not complete.
- Select CLEAR DIAGNOSTIC CODES.
- Press START button on scan tool.
Factory Service Tools
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.