why does my Ford Explorer's check engine light keep coming on?

Solution

1. Preparation

• Gather necessary tools and ensure a clean workspace.
• Disconnect the battery to avoid electrical issues during repair.

2. Address Error Codes

• Use the OBD-II scanner to retrieve and document error codes.
• Research the error codes to determine the root cause.

3. Inspect and Replace Components

A. Gas Cap

• Check the gas cap for cracks or damage.
• Replace if faulty, ensuring it clicks securely when tightened.

B. Spark Plugs

• Remove spark plug wires using a socket set.
• Inspect for wear, carbon build-up, or damage.
• Replace with OEM-spec spark plugs, torque to manufacturer specifications.

C. Air Filter

• Open the air filter housing and remove the old filter.
• Install a new air filter, ensuring it fits snugly and secures properly.

D. Fuel Pressure

• Connect a fuel pressure gauge to the fuel rail.
• Turn the ignition to the ON position (do not start).
• Check for pressure readings; replace the fuel pump if readings are below specifications.