why does my Ford Explorer Fifth Generation (2011-2019) check engine light keep coming on randomly

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

515 words

Problem Statement

Learn how to diagnose and fix the intermittent check engine light issue in Ford Explorer 2011-2019. 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 engine to cool before inspecting components.

Symptoms

•Check engine light illuminated
•Engine may run rough at idle
•Decreased fuel efficiency
•Occasional stalling or hesitation during acceleration
•Unusual engine noises (knocking or pinging)

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to retrieve any fault codes.
2
Inspect the gas cap for proper sealing and signs of damage.
3
Check engine oil level and condition; look for signs of contamination.
4
Inspect the air filter for cleanliness and proper fit.
5
Test the battery and charging system to ensure adequate voltage and connections.
6
Visually inspect ignition components (spark plugs, ignition coils) for wear or damage.

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
•Multimeter
•Inspection mirror

Parts Required

•Gas cap (if found defective)
•Air filter (if dirty)
•Spark plugs (if necessary)
•Ignition coils (if necessary)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to retrieve any fault codes.
2
Inspect the gas cap for proper sealing and signs of damage.
3
Check engine oil level and condition; look for signs of contamination.
4
Inspect the air filter for cleanliness and proper fit.
5
Test the battery and charging system to ensure adequate voltage and connections.
6
Visually inspect ignition components (spark plugs, ignition coils) for wear or damage.

Solution

1. Preparation

Tools Required: OBD-II scanner, socket set, torque wrench, multimeter, inspection mirror.
Ensure the vehicle is parked on a level surface and the engine is cool. Disconnect the negative battery terminal for safety.

2. Address Fault Codes

Sub-steps:
1. Connect the OBD-II scanner to the vehicle's diagnostic port.
2. Record any trouble codes that appear.
3. Research the codes against manufacturer specifications to identify potential issues.
4. Clear the codes and monitor if they return after a test drive.

3. Inspect and Replace Components

Sub-steps:
1. If the gas cap is faulty, replace it with a new one, ensuring it is the correct OEM part.
2. Check the air filter; if it is dirty or obstructed, replace it with a new filter.
3. Inspect spark plugs and ignition coils; replace any that show signs of wear or failure (recommended torque for spark plugs is typically 12-15 lb-ft).

4. Test Battery and Charging System

Sub-steps:
1. Use a multimeter to check the battery voltage; it should read between 12.4 to 12.7 volts when the engine is off.
2. Start the engine and check the voltage again; it should be between 13.7 to 14.7 volts.
3. If readings are outside these ranges, consider replacing the battery or alternator.