how to fix the check engine light on my Ford Explorer Sixth Generation (2020-present)

Ford Explorer Sixth Generation (2020-present)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

554 words

Problem Statement

Learn how to diagnose and fix the check engine light issue on your 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 to avoid shock.
•Allow the engine to cool before performing any inspections or repairs.

Symptoms

•Check engine light illuminated on the dashboard
•Possible reduced engine performance or power loss
•Rough idling or engine stalling
•Decreased fuel efficiency
•Unusual noises from the engine compartment
•Increased emissions or failed emissions test

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to determine the specific issue.
2
Inspect the gas cap for proper sealing; a loose or damaged gas cap can trigger the check engine light.
3
Check fluid levels (oil, coolant, transmission fluid) to ensure they are at appropriate levels.
4
Visually inspect the engine bay for any loose or damaged hoses and connections.
5
Test the battery voltage and condition to rule out electrical issues.
6
Perform a visual inspection of the exhaust system for any leaks or damages.

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
•Safety gloves

Parts Required

•Replacement O2 sensor (if applicable)
•New gas cap (if applicable)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to determine the specific issue.
2
Inspect the gas cap for proper sealing; a loose or damaged gas cap can trigger the check engine light.
3
Check fluid levels (oil, coolant, transmission fluid) to ensure they are at appropriate levels.
4
Visually inspect the engine bay for any loose or damaged hoses and connections.
5
Test the battery voltage and condition to rule out electrical issues.
6
Perform a visual inspection of the exhaust system for any leaks or damages.

Solution

1. Preparation

Gather tools including an OBD-II scanner, socket set, and safety gloves.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the battery (negative terminal) to prevent electrical shock.

2. Retrieve and Analyze Error Codes

Connect the OBD-II scanner to the vehicle's diagnostic port located under the dashboard.
Turn on the ignition without starting the engine and access the error codes.
Record and analyze the codes to determine the specific fault.

3. Repair Identified Issues

If the error code indicates a specific sensor failure (e.g., O2 sensor, MAF sensor), replace the faulty component:
- For O2 Sensor Replacement:
  1. Locate the O2 sensor(s) in the exhaust system.
  2. Use a socket wrench to remove the faulty sensor.
  3. Install the new sensor and torque to manufacturer's specifications (typically around 30 lb-ft).
If the gas cap is loose or damaged, replace it:
1. Remove the old gas cap.
2. Install a new cap and ensure it clicks securely.

4. Clear Error Codes

After repairs are made, reconnect the battery.
Reconnect the OBD-II scanner and use it to clear the error codes from the vehicle’s computer.

5. Test Drive

Start the engine and allow it to idle for a few minutes.
Take the vehicle for a test drive under various conditions to ensure the check engine light does not reappear.