why does my Ford Explorer Sixth Generation (2020-present) 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

500 words

Problem Statement

Learn how to diagnose and fix the check engine light issue in the 2020-present 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 the battery before working on electrical systems.
•Allow the engine to cool before performing any maintenance on hot components.

Symptoms

•Check engine light illuminated
•Engine runs rough or has an irregular idle
•Decreased fuel efficiency
•Unusual engine noises (knocking or pinging)
•Potential loss of power during acceleration
•Increased emissions

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any fault codes present.
2
Check all fluid levels (engine oil, coolant, transmission fluid) for proper levels and condition.
3
Inspect the gas cap for proper sealing and any signs of damage or wear.
4
Examine the air filter for clogs or restrictions that could affect air intake.
5
Inspect spark plugs and ignition coils for wear or damage.
6
Check for vacuum leaks in hoses connected to the intake manifold.

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
•Screwdriver set

Parts Required

•Spark plugs
•Air filter
•Gas cap

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any fault codes present.
2
Check all fluid levels (engine oil, coolant, transmission fluid) for proper levels and condition.
3
Inspect the gas cap for proper sealing and any signs of damage or wear.
4
Examine the air filter for clogs or restrictions that could affect air intake.
5
Inspect spark plugs and ignition coils for wear or damage.
6
Check for vacuum leaks in hoses connected to the intake manifold.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the negative terminal of the battery to ensure safety while working on electrical components.

2. Replace Faulty Components

If error codes indicate faulty spark plugs:
- Remove ignition coils using a socket set.
- Unscrew and replace spark plugs with new ones, ensuring they are gapped correctly per manufacturer specifications.
- Reinstall ignition coils and reconnect wiring harnesses.
If air filter is clogged:
- Open the air intake housing and remove the old air filter.
- Install a new air filter, sealing the housing properly.

3. Check and Replace Gas Cap

Remove the existing gas cap and inspect for any cracks or signs of wear.
Replace with a new gas cap if necessary, ensuring it clicks securely into place.

4. Inspect and Repair Vacuum Leaks

Visually inspect all hoses connected to the intake manifold for cracks or disconnections.
Replace any damaged hoses and ensure all connections are tight.

5. Clear Error Codes

Reconnect the battery terminal.
Use the OBD-II scanner to clear any existing error codes and turn off the check engine light.