AutoCodes – GMC – C0045 2016 GMC Sierra

C0045 2016 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 2016 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.
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Code Popularity 313
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 19, 2023
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Code C0045 2016 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 2016 GMC Sierra - Left Rear Wheel Speed Sensor Circuit - AutoCodes.com
C0045 2016 GMC Sierra Code - Left Rear Wheel Speed Sensor Circuit

What are the Possible Causes of the DTC C0045 2016 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 2016 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 2016 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 2016 GMC Sierra code?

Need more information on how to fix the C0045 2016 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code C0045 in a 2016 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 issues, and potential difficulty maintaining stability while driving.

2. What could be the possible causes of OBDII code C0045 in a 2016 GMC Sierra indicating a problem with the left rear wheel speed sensor circuit?

Possible causes include a faulty wheel speed sensor, damaged wiring or connectors in the circuit, corrosion, or issues with the sensor's tone ring.

3. How can I diagnose the OBDII code C0045 in my 2016 GMC Sierra that points to the left rear wheel speed sensor circuit issue?

Diagnostic steps may involve visually inspecting the sensor and its wiring, testing the sensor's resistance, checking for damaged connectors, and using a scan tool to analyze the sensor's data compared to others.

4. Is it safe to drive a 2016 GMC Sierra with OBDII code C0045 related to the left rear wheel speed sensor circuit issue?

It is not recommended to drive the vehicle with this code present, as it may affect the ABS and traction control systems, potentially compromising safety and stability while driving.

5. Can I reset the OBDII code C0045 in my 2016 GMC Sierra after fixing the left rear wheel speed sensor circuit issue?

Once the underlying issue with the left rear wheel speed sensor circuit is resolved, the code can be cleared using an OBDII scanner to reset the system and turn off the warning light.

6. How much does it typically cost to repair the OBDII code C0045 in a 2016 GMC Sierra related to the left rear wheel speed sensor circuit?

The cost of repair can vary depending on the exact cause of the issue, but it may involve replacing the wheel speed sensor, repairing damaged wiring, or addressing other related components. Costs could range from $100 to $300 or more, including parts and labor.

7. Are there any DIY tips for troubleshooting OBDII code C0045 in a 2016 GMC Sierra associated with the left rear wheel speed sensor circuit?

DIY enthusiasts can start by inspecting the sensor and its connections for visible damage, checking for loose or corroded wiring, and using a multimeter to test the sensor's resistance. However, professional diagnosis and repair may be necessary for accurate resolution.

8. What are the implications of ignoring OBDII code C0045 in a 2016 GMC Sierra indicating a malfunction in the left rear wheel speed sensor circuit?

Ignoring this code can lead to further damage to the ABS system, traction control issues, compromised vehicle stability, and potentially hazardous driving conditions. It is advisable to address the problem promptly.

9. Can extreme weather conditions affect the left rear wheel speed sensor circuit in a 2016 GMC Sierra and trigger OBDII code C0045?

Extreme weather conditions, such as heavy rain, snow, or road salt exposure, can contribute to corrosion or damage in the wheel speed sensor circuit, leading to the activation of OBDII code C0045.

10. How long does it typically take to repair OBDII code C0045 in a 2016 GMC Sierra related to the left rear wheel speed sensor circuit?

The repair time can vary based on the specific issue and the expertise of the technician. In general, resolving this code may take anywhere from 1 to 3 hours, depending on the complexity of the repair needed.

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