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Engine-Codes – GMC – C0035 2018 GMC Sierra

C0035 2018 GMC Sierra Code - Left Front Wheel Speed Sensor Circuit

Quick Answer

The C0035 diagnostic trouble code (DTC) on a 2018 GMC Sierra indicates a problem with the Left Front Wheel Speed Sensor Circuit. Common causes include Faulty wheel speed sensor, Damaged or corroded wiring connecting the sensor to the ECU, ECU malfunction. 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
C0035 2018 GMC Sierra indicates Left Front Wheel Speed Sensor Circuit.
Common causes
Common causes include Faulty wheel speed sensor, Damaged or corroded wiring connecting the sensor to the ECU, ECU malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code C0035 2018 GMC Sierra Description

The C0035 diagnostic trouble code (DTC) on a 2018 GMC Sierra indicates a problem with the Left Front Wheel Speed Sensor Circuit. The wheel speed sensors are crucial components of the vehicle's anti-lock braking system (ABS) and traction control system. They monitor the rotational speed of each wheel and provide this information to the vehicle's electronic control unit (ECU) to assist in regulating the braking system and traction control.

OBDII Code C0035 2018 GMC Sierra - Left Front Wheel Speed Sensor Circuit
C0035 2018 GMC Sierra Code - Left Front Wheel Speed Sensor Circuit

Common Causes of C0035 2018 GMC Sierra

  1. Faulty wheel speed sensor
  2. Damaged or corroded wiring connecting the sensor to the ECU
  3. ECU malfunction
  4. Contaminants or debris interfering with the sensor's operation
  5. Physical damage to the sensor or its mounting

Symptoms of C0035 2018 GMC Sierra

  1. ABS warning light illuminated on the dashboard
  2. Traction control warning light activated
  3. Erratic or inconsistent braking behavior
  4. Increased stopping distances
  5. Traction control system engaging unexpectedly

How to Fix C0035 2018 GMC Sierra

  1. Begin by visually inspecting the wiring harness and connector for any signs of damage or corrosion. Replace or repair any damaged components.
  2. Test the wheel speed sensor using a multimeter to check for proper resistance and signal output. Replace the sensor if it fails the test.
  3. Clear the DTC using a diagnostic scanner and road test the vehicle to ensure the issue has been resolved.
  4. If the problem persists, further diagnostic testing may be required to pinpoint the exact cause, such as testing the ECU or checking for signal interference.
  5. Once the root cause is identified, perform the necessary repairs or replacements and retest the system to confirm proper operation.

Cost to Fix C0035 2018 GMC Sierra

The cost estimate for resolving a C0035 DTC on a 2018 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a faulty wheel speed sensor can range from $100 to $200, while repairing damaged wiring or connectors may cost between $50 and $150. Labor costs can add an additional $80 to $150 per hour, and the total repair bill can amount to anywhere from $200 to $500 or more, depending on the extent of the repairs needed.

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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 C0035 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code C0035 in a 2018 GMC Sierra related to the Left Front Wheel Speed Sensor Circuit?

The common symptoms include the ABS warning light illuminating on the dashboard, traction control issues, and potential loss of stability control.

2. What are the possible causes of OBDII code C0035 in a 2018 GMC Sierra?

The code C0035 usually indicates a fault with the left front wheel speed sensor circuit. Possible causes include a malfunctioning wheel speed sensor, damaged wiring or connectors, or issues with the ABS control module.

3. How can I diagnose the source of OBDII code C0035 in my 2018 GMC Sierra?

Diagnosing this code typically involves using a scan tool to retrieve the specific error codes, inspecting the left front wheel speed sensor and its wiring for damage, and testing the sensor's functionality with a multimeter.

4. Can I continue driving my 2018 GMC Sierra with OBDII code C0035?

It is not advisable to continue driving with OBDII code C0035 present, as it can affect the vehicle's ABS and stability control systems, compromising safety. It is recommended to address the issue promptly.

5. How can I repair OBDII code C0035 in my 2018 GMC Sierra?

Repairing code C0035 may involve replacing the left front wheel speed sensor, repairing or replacing damaged wiring or connectors, or addressing any issues with the ABS control module. It is recommended to consult a professional mechanic for an accurate diagnosis and repair.

6. Are there any DIY tips for troubleshooting OBDII code C0035 in a 2018 GMC Sierra?

DIY tips for troubleshooting code C0035 may include visually inspecting the wheel speed sensor and its connections for any visible damage, checking the sensor's resistance with a multimeter, and ensuring all wiring is properly connected and intact.

7. Will OBDII code C0035 in a 2018 GMC Sierra cause any drivability issues?

While the vehicle may still be driveable with code C0035 present, drivability issues may arise due to the compromised ABS and stability control systems. It is recommended to address the issue promptly to avoid potential safety risks.

8. How much does it typically cost to repair OBDII code C0035 in a 2018 GMC Sierra?

The cost of repairing OBDII code C0035 can vary depending on the exact cause of the issue, parts needed for replacement, and labor costs. It is advisable to obtain quotes from different mechanics or repair shops for an accurate estimate.

9. Can weather conditions or road debris trigger OBDII code C0035 in a 2018 GMC Sierra?

Extreme weather conditions or road debris can potentially damage the wheel speed sensor or its wiring, leading to OBDII code C0035. It's essential to keep the sensors and related components clean and free of obstructions.

10. How often does OBDII code C0035 occur in a 2018 GMC Sierra, and is it a common issue?

Code C0035 related to the Left Front Wheel Speed Sensor Circuit can occur occasionally in vehicles like the 2018 GMC Sierra, especially as the vehicle ages. While it may not be extremely common, it is a known issue that can be resolved with proper diagnosis and repair.

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