what should I check if my Ford Explorer suddenly loses power while driving

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

4 min read

704 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix sudden power loss in Ford Explorer. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Engine

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before beginning work
•Ensure the vehicle is parked on a level surface and the engine is off

Symptoms

•Check engine light illuminated
•Engine stalling intermittently
•Hesitation during acceleration
•Poor fuel economy
•Unusual sounds from the engine

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any diagnostic trouble codes (DTCs)
2
Inspect the fuel system, including fuel pump operation and fuel filter condition
3
Check the air intake system for blockages or leaks in the air filter and intake hoses
4
Examine the ignition system components, including spark plugs, ignition coils, and wiring
5
Inspect the battery and charging system for voltage output and connection integrity
6
Test the throttle position sensor (TPS) and mass airflow sensor (MAF) for proper operation

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
•Multimeter
•Socket set
•Torque wrench

Parts Required

•Fuel filter
•Air filter
•Spark plugs
•Ignition coils (if defective)
•Throttle position sensor (if defective)
•Mass airflow sensor (if cleaning or replacement needed)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any diagnostic trouble codes (DTCs)
2
Inspect the fuel system, including fuel pump operation and fuel filter condition
3
Check the air intake system for blockages or leaks in the air filter and intake hoses
4
Examine the ignition system components, including spark plugs, ignition coils, and wiring
5
Inspect the battery and charging system for voltage output and connection integrity
6
Test the throttle position sensor (TPS) and mass airflow sensor (MAF) for proper operation

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 before beginning work.

2. Inspect and Test the Fuel System

Fuel Pump Check:
1. Locate the fuel pump relay and fuse in the fuse box.
2. Use a multimeter to check for voltage at the fuel pump connector while the ignition is in the "ON" position.
3. If no voltage is present, check the relay and wiring.
Fuel Filter Replacement:
1. Relieve fuel pressure by removing the fuel pump fuse and starting the engine until it stalls.
2. Disconnect fuel lines from the filter and remove the old filter.
3. Install a new fuel filter, ensuring proper orientation and secure connections.

3. Inspect the Air Intake System

Air Filter Replacement:
1. Open the air filter housing and remove the old air filter.
2. Install a new air filter and secure the housing.
Inspect Intake Hoses:
1. Check for cracks or loose connections in the intake hoses.
2. Replace any damaged hoses as necessary.

4. Check the Ignition System

Spark Plug Inspection:
1. Remove the spark plugs using a socket wrench.
2. Inspect for wear or damage; replace if necessary.
3. Reinstall the spark plugs with the manufacturer's specified torque.
Ignition Coil Testing:
1. Disconnect the wiring harness from each ignition coil.
2. Test the resistance of the coil using a multimeter; replace faulty coils.

5. Test the Charging System

Battery Check:
1. Use a multimeter to test the battery voltage; it should read around 12.6 volts at rest.
2. Clean terminals and connections if corroded.
Alternator Check:
1. Start the engine and measure the voltage across the battery terminals; it should be between 13.7 to 14.7 volts.
2. If voltage is low, consider replacing the alternator.

6. Inspect Sensors

Throttle Position Sensor (TPS) Test:
1. Disconnect the TPS connector and use a multimeter to check for resistance changes as you manually move the throttle.
2. Replace the TPS if readings are inconsistent or outside spec.
Mass Airflow Sensor (MAF) Cleaning:
1. Remove the MAF sensor from the intake.
2. Use MAF cleaner to remove any contaminants and reinstall the sensor.