Engine-CodesGMC – C0242 2016 GMC Sierra

C0242 2016 GMC Sierra Code - Engine Control Module Indicated Traction Control Malfunction

Quick Answer

The C0242 diagnostic trouble code for a 2016 GMC Sierra indicates that the Engine Control Module (ECM) has detected a malfunction in the vehicle's traction control system. Common causes include Faulty wheel speed sensors, Damaged wiring or connectors in the traction control system, Malfunctioning traction control module. 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
C0242 2016 GMC Sierra indicates Engine Control Module Indicated Traction Control Malfunction.
Common causes
Common causes include Faulty wheel speed sensors, Damaged wiring or connectors in the traction control system, Malfunctioning traction control module.
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.
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code C0242 2016 GMC Sierra Description

The C0242 diagnostic trouble code for a 2016 GMC Sierra indicates that the Engine Control Module (ECM) has detected a malfunction in the vehicle's traction control system. The traction control system is responsible for managing wheel spin and traction on the road, especially during slippery conditions like rain, snow, or ice. When this system malfunctions, it can affect the vehicle's stability, handling, and overall performance.

OBDII Code C0242 2016 GMC Sierra - Engine Control Module Indicated Traction Control Malfunction
C0242 2016 GMC Sierra Code - Engine Control Module Indicated Traction Control Malfunction

Common Causes of C0242 2016 GMC Sierra

  1. Faulty wheel speed sensors.
  2. Damaged wiring or connectors in the traction control system.
  3. Malfunctioning traction control module.
  4. Issues with the ABS system, which is closely linked to the traction control system.
  5. Corrosion or debris affecting sensor readings.

Symptoms of C0242 2016 GMC Sierra

  1. Illumination of the traction control warning light on the dashboard.
  2. Loss of traction control functionality, especially noticeable on slippery surfaces.
  3. Erratic braking or acceleration response.
  4. Decreased overall stability and handling while driving.
  5. Possible activation of the vehicle's stability control system.

How to Fix C0242 2016 GMC Sierra

  1. Diagnose the specific cause of the malfunction using a diagnostic scanner to retrieve trouble codes and perform live data analysis.
  2. Inspect and test the wheel speed sensors for proper functionality, replacing any faulty sensors.
  3. Check the wiring and connectors in the traction control system for damage or corrosion, repairing or replacing as needed.
  4. Test the traction control module for proper operation and replace if found to be faulty.
  5. Clear the trouble codes, reset the ECM, and perform a road test to ensure the issue has been resolved.

Cost to Fix C0242 2016 GMC Sierra

The typical repair costs for addressing a C0242 code on a 2016 GMC Sierra can range from $200 to $600, depending on the specific cause of the malfunction and the cost of parts and labor. It's important to note that diagnostic time and labor rates at auto repair shops can vary, with hourly rates typically ranging between $80 and $150. Factors like location, vehicle make and model, and engine type can also impact repair costs. For a more accurate estimate, it's recommended to consult with a local auto repair shop.

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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 C0242 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code C0242 in a 2016 GMC Sierra?

The common symptoms of OBDII code C0242 in a 2016 GMC Sierra include the traction control warning light illuminating on the dashboard, reduced traction control functionality, and potential stability control issues.

2. What does OBDII code C0242 in a 2016 GMC Sierra indicate?

OBDII code C0242 in a 2016 GMC Sierra indicates that the Engine Control Module (ECM) has detected a malfunction in the traction control system.

3. What are the possible causes of OBDII code C0242 in a 2016 GMC Sierra?

Possible causes of OBDII code C0242 in a 2016 GMC Sierra include a faulty traction control switch, damaged wheel speed sensors, wiring issues, or a malfunctioning ABS module.

4. How can I diagnose OBDII code C0242 in a 2016 GMC Sierra?

Diagnosing OBDII code C0242 in a 2016 GMC Sierra involves using a diagnostic scanner to retrieve the trouble codes, checking the traction control system components for visible damage, and conducting a thorough inspection of the wiring harness and connectors.

5. How can I repair OBDII code C0242 in a 2016 GMC Sierra?

Repairing OBDII code C0242 in a 2016 GMC Sierra may involve replacing a faulty traction control switch, repairing or replacing damaged wheel speed sensors, addressing wiring issues, or replacing a malfunctioning ABS module.

6. Can OBDII code C0242 in a 2016 GMC Sierra be ignored?

Ignoring OBDII code C0242 in a 2016 GMC Sierra is not recommended, as it can lead to reduced traction control functionality and potential safety issues while driving.

7. Is it safe to drive a 2016 GMC Sierra with OBDII code C0242 active?

It is generally safe to drive a 2016 GMC Sierra with OBDII code C0242 active, but it is advisable to have the issue diagnosed and repaired as soon as possible to ensure optimal traction control performance.

8. How much does it typically cost to repair OBDII code C0242 in a 2016 GMC Sierra?

The cost to repair OBDII code C0242 in a 2016 GMC Sierra can vary depending on the underlying cause of the issue, but it may range from a few hundred to a few thousand dollars, including parts and labor.

9. Can a DIY enthusiast fix OBDII code C0242 in a 2016 GMC Sierra?

A DIY enthusiast with the necessary tools and knowledge of automotive systems may be able to address simple causes of OBDII code C0242, such as replacing a faulty traction control switch or repairing wiring issues. However, complex diagnostics and repairs may require professional assistance.

10. Will resetting the OBDII system clear code C0242 in a 2016 GMC Sierra?

Resetting the OBDII system may temporarily clear code C0242 in a 2016 GMC Sierra, but if the underlying issue is not addressed, the code is likely to reappear. It is important to diagnose and repair the root cause of the problem to prevent further issues.

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