why does my Ford F-150 14th Generation (2021-2024) check engine light keep coming on

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, multimeter, basic hand tools.
• Disconnect the negative battery cable to ensure safety while working on electrical components.

2. Address Diagnostic Trouble Codes

• Use the OBD-II scanner to retrieve the error codes.
• Research the codes to identify specific issues (e.g., P0420 for catalytic converter efficiency).
• Clear the codes after making necessary repairs, then reconnect the battery.

3. Inspect and Replace Faulty Components

• Gas Cap: If the gas cap is damaged or not sealing properly, replace it with a new one.
• Air Filter: If the air filter is dirty, remove and replace it with a new filter.
• Spark Plugs: If misfire codes are present, remove the ignition coils and spark plugs. Inspect and replace worn spark plugs as necessary.
• Oxygen Sensors: If codes indicate oxygen sensor issues, remove and test the sensors. Replace if found faulty.

4. Check Exhaust System

• Inspect the exhaust system for leaks, especially around the catalytic converter and muffler. Repair or replace any damaged sections.

5. Reassemble and Test

• Reconnect any components you have removed, ensuring all bolts are torqued to specifications.
• Reconnect the negative battery terminal.
• Start the engine and monitor for any warning lights.