why does my Ford Explorer Sixth Generation (2020-present) have a check engine light and runs rough

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

562 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix check engine light and rough running issues in 2020 Ford Explorer. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Engine

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Allow the engine to cool before inspecting the exhaust system to prevent burns.

Symptoms

•Check engine light illuminated
•Rough idle
•Loss of power during acceleration
•Increased fuel consumption
•Unusual engine noises (e.g., knocking or pinging)

Diagnostic Steps

1
Scan the vehicle with an OBD-II scanner to retrieve any diagnostic trouble codes (DTCs).
2
Inspect the engine's air intake system for leaks or blockages.
3
Check the condition of the spark plugs and ignition coils.
4
Examine fuel pressure using a fuel pressure gauge to ensure adequate delivery.
5
Inspect the exhaust system for blockages or leaks, particularly in the catalytic converter.
6
Review the engine's vacuum lines for any cracks or disconnections.

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
•Spark plug socket
•Fuel pressure gauge
•Vacuum gauge

Parts Required

•Spark plugs
•Ignition coils (if faulty)
•Air filter
•Fuel filter (if clogged)
•Gaskets for intake/exhaust as needed

Related Faults

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Diagnostic Steps

1
Scan the vehicle with an OBD-II scanner to retrieve any diagnostic trouble codes (DTCs).
2
Inspect the engine's air intake system for leaks or blockages.
3
Check the condition of the spark plugs and ignition coils.
4
Examine fuel pressure using a fuel pressure gauge to ensure adequate delivery.
5
Inspect the exhaust system for blockages or leaks, particularly in the catalytic converter.
6
Review the engine's vacuum lines for any cracks or disconnections.

Solution

1. Preparation

Gather tools and parts needed for the repair.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the battery to avoid electrical shorts during the repair.

2. Address Diagnostic Trouble Codes

Sub-steps:
- Use the OBD-II scanner to note the specific DTCs.
- Research the codes to identify potential issues (e.g., misfire codes may indicate spark plug or coil issues).

3. Replace Spark Plugs and Ignition Coils (if applicable)

Sub-steps:
- Remove the engine cover (if present) using a socket set.
- Disconnect the ignition coil connectors and remove the coils from the spark plugs.
- Remove the old spark plugs using a spark plug socket.
- Install new spark plugs, ensuring they are gapped correctly (refer to manufacturer specifications).
- Reinstall the ignition coils and reconnect the connectors.

4. Inspect and Repair Air Intake System

Sub-steps:
- Remove the air intake duct and inspect the air filter for dirt or blockages.
- Clean or replace the air filter as necessary.
- Check the intake manifold for any leaks and reseal or replace gaskets as needed.

5. Check Fuel Delivery

Sub-steps:
- Connect a fuel pressure gauge to the fuel rail.
- Turn the ignition key to the "On" position and observe the fuel pressure reading.
- If the pressure is below specifications, inspect the fuel pump and filter for issues.

6. Inspect Exhaust System

Sub-steps:
- Visually inspect the exhaust system for any visible damage or leaks.
- Use a vacuum gauge to check for back pressure in the exhaust system.
- Replace the catalytic converter if there is excessive back pressure.