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

Ford Explorer Fifth Generation (2011-2019)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

582 words

Problem Statement

Discover how to diagnose and resolve check engine light issues in Ford Explorer (2011-2019). Step-by-step guide with symptoms, diagnostics, and solutions.

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 inspecting the exhaust system

Symptoms

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

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to retrieve diagnostic trouble codes (DTCs)
2
Inspect the gas cap for proper sealing and ensure it is not damaged
3
Check the engine oil level and condition, as low oil can trigger warning lights
4
Inspect air intake and vacuum lines for any leaks or blockages
5
Examine the exhaust system for leaks or damage that could affect emissions
6
Test the battery and alternator for proper voltage output, as electrical issues can cause warning lights to illuminate

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
•Screwdrivers

Parts Required

•O2 sensor (if faulty)
•Gas cap (if damaged)
•Air filter (if dirty)
•Vacuum hoses (if damaged)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to retrieve diagnostic trouble codes (DTCs)
2
Inspect the gas cap for proper sealing and ensure it is not damaged
3
Check the engine oil level and condition, as low oil can trigger warning lights
4
Inspect air intake and vacuum lines for any leaks or blockages
5
Examine the exhaust system for leaks or damage that could affect emissions
6
Test the battery and alternator for proper voltage output, as electrical issues can cause warning lights to illuminate

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the battery to avoid electrical shocks while working on components.

2. Code Resolution

Sub-step 1: Using the OBD-II scanner, note the retrieved codes and research each one to understand the potential issues.
Sub-step 2: If codes indicate a specific sensor failure (e.g., O2 sensor), locate and remove the faulty sensor.
Sub-step 3: Replace the faulty sensor with a new one, ensuring proper torque specifications are followed (typically around 30-35 ft-lbs for O2 sensors).

3. Gas Cap Inspection

Sub-step 1: Remove the gas cap and inspect for cracks or damage.
Sub-step 2: Clean the gas cap threads and sealing surface on the fuel filler neck.
Sub-step 3: Reinstall the gas cap, ensuring it clicks into place securely.

4. Air Intake and Vacuum Check

Sub-step 1: Visually inspect the air intake hose and vacuum lines for cracks or loose connections.
Sub-step 2: Replace any damaged hoses with OEM or equivalent parts.
Sub-step 3: Check the air filter condition and replace if necessary to ensure proper airflow.

5. Exhaust System Examination

Sub-step 1: Inspect the exhaust system from the catalytic converter to the tailpipe for visible signs of damage or leaks.
Sub-step 2: Tighten any loose clamps or connections.
Sub-step 3: Replace any damaged sections of the exhaust using appropriate gaskets and clamps.