why does my Ford F-150 Fourteenth Generation (2021-present) have a check engine light on after gas f...

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative terminal of the battery to reset the check engine light and ensure safety while working.

2. Inspect and Replace Gas Cap

• Remove the gas cap and inspect the sealing surface for cracks or debris.
• If damaged, replace it with a new OEM gas cap.
• Reinstall the gas cap securely and ensure it clicks into place.

3. Check EVAP System Components

• Locate the purge valve and vent valve in the EVAP system.
• Use a multimeter to test the electrical connections for continuity.
• If either valve is faulty, replace it with a new component.

4. Repair Fuel System Leaks

• Inspect the fuel lines and connections for any signs of leaks or corrosion.
• If leaks are found, replace the affected fuel lines or fittings.
• Ensure all connections are tight and secure.

5. Reset Engine Control Module (ECM)

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear any stored trouble codes.
• Start the engine and allow it to reach operating temperature.