how to troubleshoot a check engine light on Ford Explorer Fifth Generation (2011-2019)

Ford Explorer Fifth Generation (2011-2019)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

534 words

Problem Statement

Learn how to troubleshoot the check engine light on Ford Explorer (2011-2019). Step-by-step guide with 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 components
•Allow the engine to cool before inspecting the exhaust system

Symptoms

•Check engine light illuminated
•Decreased fuel economy
•Rough idle or engine misfire
•Loss of power during acceleration
•Unusual engine noises
•Failed emissions test (if applicable)

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 signs of damage
3
Check engine oil and coolant levels to ensure they are within normal ranges
4
Inspect the air filter for clogs or excessive dirt
5
Examine vacuum hoses for cracks or disconnections
6
Test the battery voltage to ensure it is within specifications

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

•Oxygen sensor (if faulty)
•Mass air flow sensor (if faulty)
•Engine air filter (if dirty)

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 signs of damage
3
Check engine oil and coolant levels to ensure they are within normal ranges
4
Inspect the air filter for clogs or excessive dirt
5
Examine vacuum hoses for cracks or disconnections
6
Test the battery voltage to ensure it is within specifications

Solution

1. Preparation

Gather necessary tools and parts.
Park the vehicle on a level surface and engage the parking brake.
Disconnect the negative battery terminal to reset the system.

2. Retrieve and Address Error Codes

Tools Required: OBD-II scanner
Connect the OBD-II scanner to the vehicle’s diagnostic port.
Turn on the ignition to the "On" position without starting the engine.
Retrieve and note the error codes displayed on the scanner.
Research the codes to identify potential issues and refer to the service manual as necessary.

3. Inspect and Replace Components

Tools Required: Socket set, torque wrench, screwdrivers
For codes related to the oxygen sensors:
- Locate the oxygen sensor(s) on the exhaust system.
- Disconnect the wiring harness and remove the sensor using a socket.
- Install the new sensor and reconnect the wiring harness.
- Torque the sensor to manufacturer specifications (typically around 30 lb-ft).
For codes related to the mass air flow (MAF) sensor:
- Locate the MAF sensor in the air intake system.
- Remove the electrical connector and the mounting screws.
- Clean the sensor with MAF cleaner, or replace it if damaged.
- Reinstall the sensor and reconnect the electrical connector.

4. Reset the Check Engine Light

Reconnect the negative battery terminal.
Use the OBD-II scanner to clear the error codes.
Start the engine and observe if the check engine light remains off.