AutoCodes – GMC – C0045 2014 GMC Sierra

C0045 2014 GMC Sierra Code - Left Rear Wheel Speed Sensor Circuit

Quick Answer

The wheel speeds are detected by active Wheel Speed Sensors (WSS) and encoder rings. Common causes include Faulty Left Rear Wheel Speed Sensor, Left Rear Wheel Speed Sensor harness is open or shorted, Left Rear Wheel Speed Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
C0045 2014 GMC Sierra indicates Left Rear Wheel Speed Sensor Circuit.
Common causes
Common causes include Faulty Left Rear Wheel Speed Sensor, Left Rear Wheel Speed Sensor harness is open or shorted, Left Rear Wheel Speed Sensor circuit poor electrical connection.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 273
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 19, 2023
πŸ’¬ Need more help? Ask Coddy for instant answers β€” it's free!

Code C0045 2014 GMC Sierra Description

The wheel speeds are detected by active Wheel Speed Sensors (WSS) and encoder rings. The encoder ring consists of permanent magnets. Each Wheel Speed Senso receives ignition voltage from the Electronic Brake Control Module (EBCM) and provides an alternating current square wave signal to the electronic brake control module. As the wheel spins, the electronic brake control module uses the frequency of the square wave signal to calculate the wheel speed. The Diagnostic Trouble Code (DTC) will be set when an improper signal is detected on the wheel speed sensor ignition circuit.
OBDII Code C0045 2014 GMC Sierra - Left Rear Wheel Speed Sensor Circuit - AutoCodes.com
C0045 2014 GMC Sierra Code - Left Rear Wheel Speed Sensor Circuit

What are the Possible Causes of the DTC C0045 2014 GMC Sierra?

  • Faulty Left Rear Wheel Speed Sensor
  • Left Rear Wheel Speed Sensor harness is open or shorted
  • Left Rear Wheel Speed Sensor circuit poor electrical connection
  • Faulty Electronic Brake Control Module (EBCM)

How to Fix the DTC C0045 2014 GMC Sierra?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C0045 2014 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the C0045 2014 GMC Sierra code?

Need more information on how to fix the C0045 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0045 2014 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C0045 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code C0045 in a 2014 GMC Sierra related to the Left Rear Wheel Speed Sensor Circuit?

The common symptoms include the ABS warning light illuminating on the dashboard, traction control system malfunctions, and potential issues with the stability control system.

2. What are the possible causes of OBDII code C0045 in a 2014 GMC Sierra?

The code C0045 in a 2014 GMC Sierra is typically triggered by a faulty left rear wheel speed sensor, damaged wiring or connectors related to the sensor, or issues with the sensor's mounting position.

3. How can I diagnose the OBDII code C0045 in my 2014 GMC Sierra?

Diagnosing OBDII code C0045 involves using a professional OBDII scanner to retrieve the fault codes, inspecting the left rear wheel speed sensor and its wiring for any visible damage, and conducting a thorough visual inspection of the sensor's mounting.

4. Can I still drive my 2014 GMC Sierra with OBDII code C0045 present?

It is not recommended to drive your GMC Sierra with OBDII code C0045 present, as it may affect the proper functioning of the ABS, traction control, and stability control systems, potentially compromising the vehicle's safety.

5. How can I repair OBDII code C0045 in my 2014 GMC Sierra related to the Left Rear Wheel Speed Sensor Circuit?

To repair OBDII code C0045, you may need to replace the left rear wheel speed sensor, repair any damaged wiring or connectors associated with the sensor, and ensure proper mounting and alignment of the new sensor.

6. Are there any DIY tips for troubleshooting OBDII code C0045 in a 2014 GMC Sierra?

While basic visual inspections can be performed by DIY enthusiasts, diagnosing and repairing OBDII code C0045 related to the Left Rear Wheel Speed Sensor Circuit may require specialized tools and expertise, so it is recommended to consult a professional mechanic.

7. How much does it typically cost to fix OBDII code C0045 in a 2014 GMC Sierra at a repair shop?

The cost of fixing OBDII code C0045 in a 2014 GMC Sierra can vary depending on the root cause of the issue, but it generally involves expenses for parts, labor, and diagnostic services, which can range from a few hundred to over a thousand dollars.

8. Is it important to address OBDII code C0045 promptly in my 2014 GMC Sierra?

Yes, it is crucial to address OBDII code C0045 promptly in your 2014 GMC Sierra to ensure the proper functioning of crucial safety systems like ABS, traction control, and stability control, and to maintain the overall safety and performance of your vehicle.

9. Can extreme weather conditions or rough terrain trigger OBDII code C0045 in a 2014 GMC Sierra?

Yes, extreme weather conditions, rough terrain, or driving through harsh environments can potentially damage the left rear wheel speed sensor or its components, leading to the triggering of OBDII code C0045 in a 2014 GMC Sierra.

10. Will resetting the OBDII system clear the code C0045 in my 2014 GMC Sierra?

While resetting the OBDII system may temporarily clear the code C0045, it is important to address the underlying issue causing the fault code to prevent it from reoccurring. A reset should not be considered a permanent solution without proper diagnosis and repair.

Discuss the causes and fixes for C0045 2014 GMC Sierra OBDII Code

Code C0045 2014 GMC Sierra comments

No comments found for this page.

AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play