why does my Ford Explorer Sixth Generation (2020-present) check engine light come on intermittently

Solution

1. Preparation

• Gather tools and components required for the repair.
• Park the vehicle on a flat surface, engage the parking brake, and disconnect the negative battery terminal.

2. Addressing Error Codes

• Use the OBD-II scanner to read and document error codes.
• Research the codes to determine the specific malfunction (e.g., P0420 for catalytic converter efficiency).

3. Inspect and Repair Components

A. Gas Cap

• Examine the gas cap for cracks or wear.
• If faulty, replace with a new gas cap and ensure it clicks securely when closed.

B. Vacuum System

• Inspect vacuum hoses for cracks or disconnections.
• Replace any damaged hoses and ensure all connections are secure.

C. Spark Plugs and Coils

• Remove the ignition coil packs and inspect for signs of wear.
• Replace worn spark plugs and ignition coils as needed.
• Ensure that all connections are reattached properly.

D. Fuel System

• Connect a fuel pressure gauge to the fuel rail and check for proper pressure (should match manufacturer specifications).
• Replace the fuel filter if restricted and verify the fuel pump operation.

E. Exhaust System

• Inspect the exhaust system for leaks, particularly around the manifold and catalytic converter.
• Repair or replace any damaged components as necessary.

4. Reconnect Battery

• Reconnect the negative battery terminal and ensure all tools are removed from the engine bay.