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

Ford Explorer Sixth Generation (2020-present)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

557 words

Problem Statement

Learn how to diagnose and fix the check engine light issue in Ford Explorer. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Engine

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect battery before working on electrical systems
•Allow engine to cool before opening any components

Symptoms

•Check engine light illuminated
•Engine runs rough or misfires
•Decreased fuel efficiency
•Unusual smells from the exhaust
•Stalling or hesitation during acceleration
•Increased emissions

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to retrieve diagnostic trouble codes (DTCs)
2
Inspect the gas cap for proper sealing and any signs of damage or wear
3
Check engine oil and coolant levels to ensure they are within normal ranges
4
Inspect ignition components (spark plugs, wires, coils) for wear or damage
5
Examine the air intake system for leaks or obstructions
6
Test the fuel system pressure using a fuel pressure gauge

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Socket set
•Fuel pressure gauge
•Throttle body cleaner
•Multimeter

Parts Required

•Replacement spark plugs
•Replacement ignition coils (if needed)
•Replacement air filter (if needed)
•Replacement fuel pump or filter (if needed)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to retrieve diagnostic trouble codes (DTCs)
2
Inspect the gas cap for proper sealing and any signs of damage or wear
3
Check engine oil and coolant levels to ensure they are within normal ranges
4
Inspect ignition components (spark plugs, wires, coils) for wear or damage
5
Examine the air intake system for leaks or obstructions
6
Test the fuel system pressure using a fuel pressure gauge

Solution

1. Preparation

Gather all necessary tools and parts.
Ensure the vehicle is parked on a level surface.
Disconnect the battery to prevent electrical shock.

2. Retrieve Diagnostic Codes

Use an OBD-II scanner to check for trouble codes.
Document any codes found for further analysis.

3. Inspect and Replace Components

A. Gas Cap

Remove the gas cap and check for any cracks or wear.
Replace the gas cap if damaged. Ensure it clicks when reinstalled.

B. Ignition Components

Remove the engine cover (if applicable) using a socket set.
Inspect spark plugs for wear; replace if necessary (use OEM specifications for type and gap).
Check ignition coils for proper function; replace faulty coils.

C. Air Intake System

Inspect air filter for dirt and clogging; replace if necessary.
Check for cracks or loose connections in intake hoses.
Clean throttle body using throttle body cleaner and a microfiber cloth.

D. Fuel System

Connect a fuel pressure gauge to the fuel rail.
Turn the ignition key to the ON position (without starting the engine) and check the pressure reading.
If pressure is below specifications, consider replacing the fuel pump or filter.

4. Reconnect Battery

Reconnect the battery terminals securely.
Ensure all connections are tight.

5. Clear Codes

Use the OBD-II scanner to clear the trouble codes from the vehicle’s computer.
Perform a test drive to observe if the check engine light reappears.