my Ford Explorer has a check engine light and is running rough

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

517 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 the check engine light and rough running issues in your 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 systems.
•Allow the engine to cool before opening any components to avoid burns.

Symptoms

•Check engine light illuminated
•Rough idle
•Engine stalling intermittently
•Loss of power during acceleration
•Poor fuel economy
•Increased emissions

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific trouble codes.
2
Inspect the air filter for clogs or damage.
3
Check the fuel pressure to ensure it meets manufacturer specifications.
4
Examine ignition system components, including spark plugs and coils, for wear or damage.
5
Inspect vacuum hoses for leaks or disconnections.
6
Perform a visual inspection of the exhaust system for restrictions or leaks.

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
•Spark plug socket
•Torque wrench
•Screwdrivers
•Pliers

Parts Required

•Spark plugs
•Ignition coils (if faulty)
•Air filter
•Vacuum hoses (if damaged)
•Fuel filter (if clogged)

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 air filter for clogs or damage.
3
Check the fuel pressure to ensure it meets manufacturer specifications.
4
Examine ignition system components, including spark plugs and coils, for wear or damage.
5
Inspect vacuum hoses for leaks or disconnections.
6
Perform a visual inspection of the exhaust system for restrictions or leaks.

Solution

1. Preparation

Gather tools and parts needed for the repair.
Disconnect the vehicle's battery to ensure safety during the repair process.

2. Address Error Codes

Use the OBD-II scanner to retrieve and document the error codes.
Clear the codes after diagnosis to determine if they return after repairs.

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

Tools Required: Spark plug socket, torque wrench.
Remove the ignition coil cover if applicable.
Disconnect the electrical connectors from the ignition coils.
Unscrew and remove the faulty coils and spark plugs.
Install new spark plugs and torque them to the manufacturer’s specifications (typically around 13-20 ft-lbs).
Reinstall the ignition coils and reconnect electrical connectors.

4. Replace Air Filter (if clogged)

Open the air filter housing.
Remove the old air filter and inspect the housing for debris.
Install a new air filter ensuring a proper fit.

5. Repair or Replace Vacuum Hoses

Inspect all vacuum hoses connected to the intake manifold.
Replace any cracked or damaged hoses with new ones.

6. Fuel Pressure Regulator and Fuel Filter (if necessary)

If fuel pressure is low, inspect the fuel filter for clogs.
Replace the fuel filter if it is clogged.
Test or replace the fuel pressure regulator if it is not holding pressure.