my Ford Explorer Fifth Generation (2011-2019) has poor fuel economy, what can I do?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

488 words

Problem Statement

Learn how to diagnose and fix poor fuel economy issues in Ford Explorer 2011-2019. Step-by-step guide with diagnostic procedures 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 performing maintenance to avoid burns.

Symptoms

•Check engine light illuminated
•Decreased miles per gallon (MPG)
•Rough idle or engine stumbling
•Increased emissions or exhaust smell
•Unusual engine noises (knocking or pinging)

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any engine-related issues.
2
Check tire pressure and condition, ensuring they are inflated to the manufacturer’s specifications.
3
Inspect the air filter for blockage or dirt, replacing it if necessary.
4
Evaluate fuel quality and confirm no fuel contamination.
5
Examine the fuel injectors for clogs or leaks.
6
Inspect the mass airflow sensor (MAF) for dirt or malfunction.

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
•Screwdrivers
•Fuel injector cleaner
•Mass airflow (MAF) cleaner

Parts Required

•New air filter
•Fuel injector cleaner (if needed)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any engine-related issues.
2
Check tire pressure and condition, ensuring they are inflated to the manufacturer’s specifications.
3
Inspect the air filter for blockage or dirt, replacing it if necessary.
4
Evaluate fuel quality and confirm no fuel contamination.
5
Examine the fuel injectors for clogs or leaks.
6
Inspect the mass airflow sensor (MAF) for dirt or malfunction.

Solution

1. Preparation

Gather tools and materials: OBD-II scanner, socket set, screwdrivers, fuel injector cleaner, new air filter, and MAF cleaner.
Ensure the vehicle is parked on a level surface, and engage the parking brake.

2. Address Diagnostic Codes

If error codes are present, research the specific codes to identify the necessary repairs.
Clear the codes using the OBD-II scanner after repairs are made.

3. Replace Air Filter

Locate the air filter housing, usually near the engine bay.
Remove the screws or clips securing the housing.
Take out the old air filter and clean the housing with a damp cloth.
Insert the new air filter, ensuring it is seated properly, and reassemble the housing.

4. Clean Fuel Injectors

Use a fuel injector cleaner:
- Follow the instructions on the cleaner, typically adding it to the fuel tank.
- Run the engine to allow the cleaner to cycle through the injectors.

5. Clean Mass Airflow Sensor

Locate the MAF sensor, usually positioned between the air filter and the throttle body.
Disconnect the electrical connector and remove the sensor from the intake.
Spray MAF cleaner onto the sensor elements and let it dry completely before reinstalling.