why does my Ford Explorer Fifth Generation (2011-2019) have a high-pitched whine

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

567 words

Problem Statement

Learn how to diagnose and fix high-pitched whine in Ford Explorer Fifth Generation (2011-2019). Step-by-step guide with symptoms, diagnostics, and repairs.

Affected Component

Transmission

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 inspections or repairs on cooling components.

Symptoms

•High-pitched whine audible during acceleration
•Whine changes pitch with vehicle speed
•Whine occurs when the engine is running, regardless of gear
•Possible decrease in fuel efficiency
•Potential vibration felt through the steering wheel or floor

Diagnostic Steps

1
Check for any DTCs (Diagnostic Trouble Codes) using an OBD-II scanner.
2
Inspect the serpentine belt for wear or damage that could cause a noise.
3
Listen for the source of the whine while the engine is idling to determine if it is coming from the engine bay or drivetrain.
4
Inspect the transmission fluid level and condition, as low or contaminated fluid can lead to whining noises.
5
Examine the alternator and power steering pump for signs of wear or failure.
6
Check wheel bearings and differential for any unusual noise or play.

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
•Wrench set
•Socket set
•Multimeter
•Fluid pump (for transmission fluid)

Parts Required

•Serpentine belt (if worn)
•Transmission fluid (if needed)
•Transmission filter (if applicable)
•Alternator (if faulty)
•Power steering pump (if faulty)

Related Faults

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Diagnostic Steps

1
Check for any DTCs (Diagnostic Trouble Codes) using an OBD-II scanner.
2
Inspect the serpentine belt for wear or damage that could cause a noise.
3
Listen for the source of the whine while the engine is idling to determine if it is coming from the engine bay or drivetrain.
4
Inspect the transmission fluid level and condition, as low or contaminated fluid can lead to whining noises.
5
Examine the alternator and power steering pump for signs of wear or failure.
6
Check wheel bearings and differential for any unusual noise or play.

Solution

1. Preparation

Gather tools and parts needed before starting.
Park the vehicle on a flat surface and engage the parking brake.
Disconnect the negative battery terminal.

2. Inspect and Replace the Serpentine Belt

Locate the serpentine belt tensioner and relieve tension using a wrench.
Remove the belt from the pulleys and inspect for cracks or fraying.
If damaged, install a new serpentine belt by routing it according to the belt routing diagram.
Reapply tension using the tensioner and check the alignment.

3. Transmission Fluid Service

Locate the transmission fluid dipstick or fill port.
Remove the dipstick and check fluid level; top off or replace fluid if low.
If fluid is dark or smells burnt, perform a transmission fluid change.
- Drain the old fluid from the transmission pan.
- Replace the transmission filter if applicable.
- Refill with the manufacturer's recommended transmission fluid.

4. Alternator and Power Steering Inspection

Visually inspect the alternator and power steering pump for leaks or damage.
Use a multimeter to check alternator output; it should typically be between 13.5 to 14.5 volts.
If faulty, replace the alternator or power steering pump as necessary.

5. Wheel Bearing and Differential Check

Lift the vehicle securely and remove the wheel to access the wheel bearings.
Spin the hub and listen for noise; replace any bearings that are noisy or rough.
Inspect the differential fluid level and condition; replace if necessary.