why is my Ford Explorer check engine light on and what should I check first

Ford Explorer Fifth Generation (2011-2019)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

586 words

Problem Statement

Learn how to diagnose and fix the check engine light issue in Ford Explorer. Step-by-step guide with symptoms, diagnostic steps, 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.
•Allow the engine to cool before opening the hood or working on the engine.

Symptoms

•Check engine light illuminated
•Rough idle or stalling
•Decreased fuel efficiency
•Unusual engine noises
•Poor acceleration or loss of power

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific trouble codes.
2
Inspect the gas cap for tightness or damage, as a loose or defective cap can trigger the light.
3
Check the engine oil level and condition; low or dirty oil can affect engine performance.
4
Examine the air filter for clogs or excessive dirt that may affect air intake.
5
Inspect the exhaust system for leaks or damage that could lead to increased emissions.
6
Review the fuel system for issues, such as low fuel pressure or a failing fuel pump.

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
•Oil filter wrench
•Fuel pressure gauge
•Screwdriver set

Parts Required

•New gas cap (if necessary)
•Engine oil (specific to vehicle requirements)
•Oil filter (specific to vehicle requirements)
•Air filter (specific to vehicle requirements)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific trouble codes.
2
Inspect the gas cap for tightness or damage, as a loose or defective cap can trigger the light.
3
Check the engine oil level and condition; low or dirty oil can affect engine performance.
4
Examine the air filter for clogs or excessive dirt that may affect air intake.
5
Inspect the exhaust system for leaks or damage that could lead to increased emissions.
6
Review the fuel system for issues, such as low fuel pressure or a failing fuel pump.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is cool.
Disconnect the battery to ensure safety while working on electrical components.

2. Scan for Error Codes

Connect the OBD-II scanner to the diagnostic port.
Turn the ignition to the "On" position without starting the engine.
Read and record any trouble codes displayed on the scanner.

3. Inspect and Replace Gas Cap (if necessary)

Check the gas cap for signs of wear or damage.
If the cap is damaged, replace it with a new one, ensuring it is tightened properly.

4. Oil Change (if necessary)

If the engine oil is low or dirty, drain the old oil using a wrench.
Replace the oil filter using an oil filter wrench.
Refill the engine with the manufacturer-recommended oil type and quantity.

5. Replace Air Filter (if necessary)

Locate the air filter housing and remove the cover (typically involves unscrewing clips or screws).
Remove the old air filter and inspect it for dirt and debris.
Install a new air filter, ensuring it fits snugly, then reattach the housing cover.

6. Inspect Exhaust System

Visually inspect the exhaust pipes and muffler for any signs of rust, holes, or loose connections.
Tighten any loose fittings or replace damaged components as needed.

7. Fuel System Inspection

Check the fuel pressure using a fuel pressure gauge.
If the pressure is low, inspect the fuel pump and fuel filter for blockages or failure.
Replace any faulty components as necessary.