AutoCodes – GMC – C0156 GMC

C0156 GMC Code - Right TCS Solenoid #2 Circuit Malfunction

Quick Answer

The isolation and prime valve solenoid circuits are supplied with battery power when the ignition is in the ON position. Common causes include Faulty Electronic Brake Control Module (EBCM), Electronic Brake Control Module (EBCM) harness is open or shorted, Electronic Brake Control Module (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: C0156 GMC indicates Right TCS Solenoid #2 Circuit Malfunction.
Common causes: Common causes include Faulty Electronic Brake Control Module (EBCM), Electronic Brake Control Module (EBCM) harness is open or shorted, Electronic Brake Control Module (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 950

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 May 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0156 GMC Description

The isolation and prime valve solenoid circuits are supplied with battery power when the ignition is in the ON position. The Electronic Brake Control Module (EBCM) controls the valve functions by grounding the circuit when necessary. The solenoid valve circuit and the solenoid coil are internal to the EBCM. No part of the solenoid circuit is diagnosable external to the EBCM. The DTC sets when there is a malfunction in the solenoid circuit internal to the EBCM only.

OBDII Code C0156 GMC - Right TCS Solenoid #2 Circuit Malfunction - AutoCodes.com — C0156 GMC Code - Right TCS Solenoid #2 Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC C0156 GMC?

Faulty Electronic Brake Control Module (EBCM)
Electronic Brake Control Module (EBCM) harness is open or shorted
Electronic Brake Control Module (EBCM) circuit poor electrical connection

How to Fix the DTC C0156 GMC?

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 C0156 GMC 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.

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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 C0156 GMC Code

1. What are common symptoms of OBDII code C0156 GMC (Right TCS Solenoid #2 Circuit Malfunction)?

- Common symptoms include the traction control system (TCS) light being illuminated on the dashboard, traction control system not functioning properly, and potential loss of traction control.

2. What can cause the OBDII code C0156 GMC to appear?

- The code C0156 is typically triggered by issues such as a faulty TCS solenoid #2, damaged wiring or connectors in the TCS circuit, or a problem with the TCS control module.

3. How can I diagnose the Right TCS Solenoid #2 Circuit Malfunction?

- Diagnosing this issue involves using an OBDII scanner to retrieve the specific trouble code, inspecting the TCS solenoid #2 and its circuit for any visible damage, and conducting electrical tests to pinpoint the exact cause.

4. Can I still drive my GMC vehicle with the C0156 trouble code?

- It is not recommended to drive your vehicle with the C0156 code present, as it can affect the proper functioning of the traction control system, potentially compromising your safety on the road.

5. How can I repair the Right TCS Solenoid #2 Circuit Malfunction?

- Repair options may include replacing the faulty TCS solenoid #2, repairing or replacing damaged wiring or connectors in the circuit, and resetting the trouble code with an OBDII scanner after the repair is completed.

6. Is it necessary to reset the trouble code after repairing the C0156 GMC code?

- Yes, it is important to reset the trouble code using an OBDII scanner after repairing the issue. This will clear the code from the vehicle's system and ensure that the repair was successful.

7. Can weather conditions affect the appearance of the C0156 trouble code?

- Extreme weather conditions or exposure to moisture can sometimes contribute to the triggering of the C0156 code, as water or corrosion in the TCS circuit can lead to malfunctions.

8. How long does it typically take to repair the Right TCS Solenoid #2 Circuit Malfunction?

- The repair time can vary depending on the exact cause of the issue and the expertise of the person performing the repair. It can range from a quick fix to a more involved repair process.

9. Will the C0156 trouble code go away on its own?

- The C0156 code will not typically disappear on its own. It is important to address the underlying issue causing the code to prevent further problems with the TCS system.

10. Is it possible to prevent the Right TCS Solenoid #2 Circuit Malfunction from occurring?

- Regular maintenance checks, avoiding driving in extreme conditions, and promptly addressing any warning lights related to the traction control system can help prevent the C0156 trouble code from appearing.