why does my Ford Explorer Fifth Generation (2011-2019) check engine light keep turning on

Solution

1. Preparation

• Gather tools and parts needed for repair.
• Disconnect the battery to prevent electrical shorts while working on the vehicle.
• Tools Required: OBD-II scanner, socket set, multimeter, vacuum gauge.

2. Address Error Codes

• Based on the retrieved error codes, perform necessary repairs:

  • For P0420 (Catalytic Converter):

    1. Inspect the catalytic converter for physical damage.
    2. If damaged, replace it with a new catalytic converter.
    3. Torque the exhaust bolts to manufacturer specifications (usually around 30-35 ft-lbs).

  • For Ignition Misfires:

    1. Remove spark plugs and inspect for wear or fouling.
    2. Replace faulty spark plugs with OEM parts.
    3. Inspect and replace ignition coils if necessary.

  • For Vacuum Leaks:

    1. Use a vacuum gauge to check for leaks.
    2. Replace any damaged hoses or gaskets.

3. Sensor Inspection

• Check the MAF and TPS:
  1. Disconnect the electrical connectors.
  2. Clean the MAF using MAF cleaner spray.
  3. Test the TPS with a multimeter to ensure it reads correctly across its range of motion.
  4. Replace the sensor if it is not functioning properly.

4. Reassemble and Reconnect

• After repairs, reassemble any removed components.
• Reconnect the battery and ensure all connections are secure.