AutoCodes – GMC – C0242 2017 GMC Sierra

C0242 2017 GMC Sierra Code - Engine Control Module Indicated Traction Control Malfunction

Quick Answer

The Electronic Brake Control Module (EBCM) and the Engine Control Module (ECM) simultaneously control the traction control. Common causes include Faulty Electronic Brake Control Module (EBCM), EBCM Harness is open or shorted, EBCM 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: C0242 2017 GMC Sierra indicates Engine Control Module Indicated Traction Control Malfunction.
Common causes: Common causes include Faulty Electronic Brake Control Module (EBCM), EBCM Harness is open or shorted, EBCM 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 378

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 28, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0242 2017 GMC Sierra Description

The Electronic Brake Control Module (EBCM) and the Engine Control Module (ECM) simultaneously control the traction control. The Electronic Brake Control Module sends a serial data message to the Engine Control Module requesting torque reduction. When certain Engine Control Module DTCs are set, the Engine Control Module will not be able to perform the torque reduction for traction control. A serial data message is sent to the Electronic Brake Control Module indicating that traction control is not allowed. The Diagnostic Trouble Code (DTC) engine control module detects a fault that prevents it from performing a traction control function and sends a serial data message to the electronic brake control module indicating that torque reduction is not allowed.

OBDII Code C0242 2017 GMC Sierra - Engine Control Module Indicated Traction Control Malfunction - AutoCodes.com — C0242 2017 GMC Sierra Code - Engine Control Module Indicated Traction Control Malfunction

What does this mean?

What are the Possible Causes of the DTC C0242 2017 GMC Sierra?

Faulty Electronic Brake Control Module (EBCM)
EBCM Harness is open or shorted
EBCM Circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC C0242 2017 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 C0242 2017 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 C0242 2017 GMC Sierra 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 C0242 2017 GMC Sierra Code

1. What does the OBDII code C0242 mean on a 2017 GMC Sierra?

The code C0242 indicates that the Engine Control Module (ECM) has detected a malfunction related to the traction control system.

2. What are the common symptoms of code C0242 in a 2017 GMC Sierra?

Common symptoms include the traction control light being illuminated, reduced engine power, ABS light activation, and possible stability control deactivation.

3. What causes the C0242 code on a 2017 GMC Sierra?

Potential causes include faulty communication between the ECM and the Electronic Brake Control Module (EBCM), wiring issues, a damaged EBCM, or a malfunctioning ECM.

4. Can a faulty wheel speed sensor trigger the C0242 code?

No, a faulty wheel speed sensor typically triggers other ABS-related codes, but C0242 is specific to communication or ECM/EBCM issues.

5. How can I diagnose the C0242 code on my 2017 GMC Sierra?

Start by scanning for any related codes, inspecting the wiring and connections between the ECM and EBCM, and testing the modules for proper functionality.

6. Can I drive my 2017 GMC Sierra with the C0242 code?

While the vehicle may still be drivable, traction control and stability features may be compromised, posing a safety risk, especially in slippery conditions.

7. How much does it cost to fix the C0242 code on a 2017 GMC Sierra?

Repair costs vary but may range from $150 to $1,000 depending on whether the issue is a wiring repair, module reprogramming, or replacement of a faulty ECM or EBCM.

8. How do I reset the C0242 code after repairs?

Use an OBDII scanner to clear the code, but ensure the underlying issue has been resolved to prevent the code from returning.

9. Can a software update fix the C0242 code on a 2017 GMC Sierra?

In some cases, a software update for the ECM or EBCM can resolve communication issues causing the code.

10. Should I take my 2017 GMC Sierra to a professional for the C0242 code?

If you're not experienced with diagnosing and repairing complex electrical systems, it's recommended to consult a qualified mechanic for proper diagnosis and repair.