why does my Ford F-150 13th Generation (2015-2020) engine light keep coming on

Solution

1. Preparation

• Gather tools and parts needed for the repairs.
• Disconnect the battery (negative terminal) to ensure safety while working on electrical components.

2. Address Faulty Codes

• Refer to the trouble codes retrieved from the OBD-II scanner.
• For example, if P0420 (Catalytic Converter Efficiency Below Threshold) is indicated:
  1. Inspect the catalytic converter for physical damage.
  2. Check for exhaust leaks before the converter.
  3. Replace the catalytic converter if found defective.

3. Replace Components as Necessary

• Ignition System:

  1. Remove spark plug wires or ignition coils.
  2. Replace spark plugs with manufacturer-recommended parts.
  3. Reinstall ignition components securely.

• Air Filter:

  1. Open the air filter housing.
  2. Remove and inspect the air filter; replace if dirty or damaged.
  3. Reassemble the housing ensuring a proper seal.

4. Check Emission Components

• Inspect the EVAP system:
  1. Locate and test the EVAP purge valve for proper operation.
  2. Replace it if malfunctioning.
• Inspect the oxygen sensors:
  1. Check for proper wiring and connections.
  2. Replace any faulty sensors as indicated by diagnostic codes.