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

499 words

Problem Statement

Learn how to diagnose and fix the check engine light issue in your Ford Explorer (2020-present). Step-by-step guide with symptoms, diagnostics, and repairs.

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 engine to cool before performing any inspections or repairs.

Symptoms

•Check engine light illuminated
•Decreased fuel efficiency
•Engine misfires or rough idling
•Loss of power during acceleration
•Unusual engine noises (e.g., knocking or pinging)

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific trouble codes.
2
Check for any visible signs of damage to wiring and connectors in the engine bay.
3
Inspect the gas cap for proper sealing and any signs of wear or damage.
4
Test the battery and alternator to ensure proper voltage supply to the engine control unit (ECU).
5
Examine the air filter for clogging or contamination.
6
Inspect the exhaust system for leaks or blockages.

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
•Multimeter
•Screwdrivers
•Torque wrench

Parts Required

•Replacement gas cap
•New air filter
•Battery (if needed)
•Alternator (if needed)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific trouble codes.
2
Check for any visible signs of damage to wiring and connectors in the engine bay.
3
Inspect the gas cap for proper sealing and any signs of wear or damage.
4
Test the battery and alternator to ensure proper voltage supply to the engine control unit (ECU).
5
Examine the air filter for clogging or contamination.
6
Inspect the exhaust system for leaks or blockages.

Solution

1. Preparation

Gather all necessary tools and replacement parts.
Ensure the vehicle is parked on a level surface and the engine is cool.
Disconnect the negative battery cable to avoid electrical shocks.

2. Addressing Error Codes

Reconnect the OBD-II scanner and note the trouble codes.
Research the codes to determine associated components and potential repairs.
Clear the codes from the ECU and reconnect the negative battery cable.

3. Inspect and Replace Components

Gas Cap:
- Check the gas cap for damage or improper sealing.
- If damaged, replace with a new gas cap.
Air Filter:
- Remove the air filter cover using a socket set.
- Inspect the air filter; replace if dirty or clogged.
Battery and Alternator:
- Use a multimeter to check battery voltage; replace if below 12.4 volts.
- Test alternator output; replace if not charging properly.

4. Exhaust System Inspection

Visually inspect the exhaust system for leaks or damage.
Repair or replace any damaged sections of the exhaust.

5. Final Checks

Reconnect the battery.
Start the engine and monitor for any warning lights or unusual sounds.