how to fix C0045 code in Ford Explorer Fifth Generation (2011-2019)

Ford Explorer Fifth Generation (2011-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

Error Code: C0045

3 min read

564 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 C0045 code related to the wheel speed sensor in Ford Explorer (2011-2019). Step-by-step guide with tools and procedures.

Error Code

C0045

Affected Component

Brakes

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to prevent shocks or shorts.
•Ensure the vehicle is securely supported on jack stands before working underneath it.

Symptoms

•ABS warning light illuminated on the dashboard
•Traction control warning light activated
•Erratic or inconsistent braking performance
•Speedometer may function improperly
•Vehicle may exhibit wheel lock-up during braking

Diagnostic Steps

1
Scan the vehicle's computer using an OBD-II scanner to confirm the C0045 code and check for other related codes.
2
Inspect the left rear wheel speed sensor wiring and connectors for any visible damage or corrosion.
3
Measure the resistance of the left rear wheel speed sensor using a multimeter to ensure it is within manufacturer specifications.
4
Check the sensor signal output while the vehicle is in motion to see if it corresponds with the other wheel speed sensors.
5
Inspect the ABS control module for any fault codes or communication issues.

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
•Flathead screwdriver
•Jack and jack stands

Parts Required

•Left rear wheel speed sensor

Related Faults

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Diagnostic Steps

1
Scan the vehicle's computer using an OBD-II scanner to confirm the C0045 code and check for other related codes.
2
Inspect the left rear wheel speed sensor wiring and connectors for any visible damage or corrosion.
3
Measure the resistance of the left rear wheel speed sensor using a multimeter to ensure it is within manufacturer specifications.
4
Check the sensor signal output while the vehicle is in motion to see if it corresponds with the other wheel speed sensors.
5
Inspect the ABS control module for any fault codes or communication issues.

Solution

1. Preparation

Gather required tools and parts.
Ensure the vehicle is parked on a level surface and the ignition is off.
Disconnect the battery to prevent any electrical short circuits.

2. Inspect and Clean Connectors

Locate the left rear wheel speed sensor connector.
Disconnect the sensor connector and visually inspect for corrosion or bent pins.
Clean the connector with electrical contact cleaner if any corrosion is present.
Reconnect the sensor connector securely.

3. Replace Wheel Speed Sensor

Tools Required: Socket set, torque wrench, flathead screwdriver.
Raise the vehicle safely using jack stands and remove the left rear wheel.
Locate the wheel speed sensor mounted on the rear axle or hub assembly.
Remove the bolt securing the sensor using a socket and ratchet.
Pull the sensor out gently; if it resists, use a flathead screwdriver to pry it out carefully.
Install the new sensor by reversing the removal process. Ensure it is seated properly.
Torque the securing bolt to the manufacturer’s specifications (typically around 10-15 ft-lbs).

4. Reconnect Battery and Clear Codes

Reconnect the vehicle’s battery terminals securely.
Use the OBD-II scanner to clear the C0045 and any related codes from the vehicle's computer.

5. Test Drive

Start the vehicle and conduct a test drive to ensure that the ABS and traction control systems function properly and that the warning lights do not reappear.