why does my Ford Explorer Fifth Generation (2011-2019) have poor gas mileage

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

542 words

Problem Statement

Discover how to diagnose and fix poor gas mileage issues in Ford Explorer Fifth Generation (2011-2019). Step-by-step guide with essential tips.

Affected Component

Fuel System

Estimated Time

2-4 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
•Noticeable decrease in fuel efficiency
•Engine stalling during acceleration
•Rough idling or engine misfires
•Unusual engine noises
•Increased emissions or exhaust smoke

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any potential issues.
2
Check tire pressure and tread condition; under-inflated or worn tires can affect fuel economy.
3
Inspect the air filter for clogs or restrictions that may hinder airflow to the engine.
4
Measure fuel pressure using a fuel pressure gauge to determine if the fuel pump is functioning properly.
5
Examine the throttle position sensor and mass airflow sensor for proper function.
6
Review the vehicle's maintenance records for overdue services or neglected components.

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
•Tire pressure gauge
•Screwdriver
•Electrical cleaner
•Fuel pressure gauge

Parts Required

•New air filter
•Potential fuel pump (if needed)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any potential issues.
2
Check tire pressure and tread condition; under-inflated or worn tires can affect fuel economy.
3
Inspect the air filter for clogs or restrictions that may hinder airflow to the engine.
4
Measure fuel pressure using a fuel pressure gauge to determine if the fuel pump is functioning properly.
5
Examine the throttle position sensor and mass airflow sensor for proper function.
6
Review the vehicle's maintenance records for overdue services or neglected components.

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 for safety when working on electrical components.

2. Replace Air Filter

Tools Required: Screwdriver, new air filter.
Remove the air filter housing cover by unscrewing or unclipping it.
Take out the old air filter and inspect for dirt and debris.
Insert the new air filter, ensuring it fits snugly.
Reattach the air filter housing cover securely.

3. Check Tire Pressure

Tools Required: Tire pressure gauge.
Remove the valve cap from each tire.
Use the tire pressure gauge to check the pressure against the manufacturer-recommended PSI (usually found on the driver’s door jamb).
Inflate tires to the recommended pressure if they are low.

4. Inspect and Clean Sensors

Tools Required: Electrical cleaner, screwdriver.
Locate the throttle position sensor and mass airflow sensor.
Disconnect the electrical connectors and remove the sensors.
Clean the sensors using electrical cleaner and a soft cloth.
Reinstall the sensors and reconnect the electrical connectors.

5. Fuel System Check

Tools Required: Fuel pressure gauge.
Locate the fuel rail and connect the fuel pressure gauge.
Start the engine and observe the fuel pressure reading; it should match the vehicle specifications.
If pressure is low, consider replacing the fuel pump.