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

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

538 words

Problem Statement

Learn how to diagnose and fix the check engine light issue in your 2020 Ford Explorer. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Engine

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect battery before working on electrical systems.
•Allow engine to cool before opening any components related to the cooling system or touching any engine parts.

Symptoms

•Check engine light illuminated
•Engine running rough or misfiring
•Decreased fuel efficiency
•Unusual exhaust odors
•Possible loss of power during acceleration
•Engine stalling intermittently

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific trouble codes.
2
Inspect the gas cap for proper sealing, as a loose or damaged cap can trigger the check engine light.
3
Check for any visible leaks in the vacuum hoses or intake system.
4
Examine the ignition system components, including spark plugs and ignition coils.
5
Test the fuel pressure using a fuel pressure gauge to ensure it meets specifications.
6
Review the engine’s mass airflow (MAF) sensor readings and clean or replace if necessary.

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
•Torque wrench
•Fuel pressure gauge
•MAF sensor cleaner

Parts Required

•Spark plugs
•Ignition coils (if defective)
•Mass airflow sensor (if defective)
•Fuel filter (if necessary)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific trouble codes.
2
Inspect the gas cap for proper sealing, as a loose or damaged cap can trigger the check engine light.
3
Check for any visible leaks in the vacuum hoses or intake system.
4
Examine the ignition system components, including spark plugs and ignition coils.
5
Test the fuel pressure using a fuel pressure gauge to ensure it meets specifications.
6
Review the engine’s mass airflow (MAF) sensor readings and clean or replace if necessary.

Solution

1. Preparation

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

2. Address Fault Codes

Using the OBD-II scanner, note the trouble codes that were retrieved.
Research the meaning of each code and focus on the most critical ones for diagnosis.

3. Inspect and Replace Components

Ignition System:
1. Remove the ignition coil cover using a socket set.
2. Inspect the ignition coils and spark plugs for wear or damage; replace as necessary.
3. Torque the new spark plugs to the manufacturer's specification (typically around 13-15 lb-ft).
Mass Airflow Sensor:
1. Locate the MAF sensor in the intake system.
2. Disconnect the wiring harness and remove the sensor.
3. Clean the MAF sensor with MAF cleaner spray or replace it if it’s defective.
Fuel System:
1. Connect the fuel pressure gauge to the fuel rail.
2. Turn the ignition to the ON position without starting the engine and check the fuel pressure against manufacturer specifications.
3. Replace the fuel filter if pressure is below specification.

4. Reassemble and Test

Reconnect any components that were removed during inspection and repair.
Reconnect the negative battery terminal.
Start the engine and allow it to reach operating temperature.
Monitor for any reoccurrence of the check engine light.