AutoCodes – Generic – C0156

C0156 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 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 2,763

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

What does this mean?

What are the Possible Causes of the DTC C0156?

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?

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 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 C0156 code?

Need more information on how to fix the C0156 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0156 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C0156 Buick — Right TCS Solenoid #2 Circuit Malfunction
C0156 Cadillac — Right TCS Solenoid #2 Circuit Malfunction
C0156 Chevrolet — Right TCS Solenoid #2 Circuit Malfunction
C0156 GMC — Right TCS Solenoid #2 Circuit Malfunction
C0156 Pontiac — Right TCS Solenoid #2 Circuit Malfunction
C0156 Saturn — Right TCS Solenoid #2 Circuit Malfunction

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 Code

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

- Common symptoms include the traction control system (TCS) light illuminating on the dashboard, poor traction control performance, and potential loss of stability while driving.

2. What are possible causes of OBDII code C0156?

- Possible causes include a faulty TCS solenoid #2, damaged wiring or connectors in the TCS circuit, low fluid levels in the TCS system, or a malfunctioning TCS control module.

3. How can I diagnose the cause of OBDII code C0156?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, inspecting the TCS solenoid #2 and its wiring for any visible damage, and conducting further electrical testing to pinpoint the issue.

4. Can I still drive my vehicle with OBDII code C0156 present?

- It is not recommended to drive the vehicle with this code present, as it can affect the proper functionality of the traction control system, potentially compromising safety and performance.

5. How can I repair OBDII code C0156?

- Repair options may include replacing the faulty TCS solenoid #2, repairing or replacing damaged wiring or connectors, ensuring proper fluid levels in the TCS system, or reprogramming the TCS control module.

6. Are there any DIY tips for fixing OBDII code C0156?

- DIY tips may include checking and cleaning the TCS solenoid connectors, inspecting and repairing damaged wiring, and ensuring the TCS system components are properly secured and functioning.

7. How much does it typically cost to repair OBDII code C0156?

- Repair costs can vary depending on the specific issue causing the code, but they may range from $100 to $500 for parts and labor, with additional costs if professional diagnostic services are needed.

8. Can OBDII code C0156 cause other problems in the vehicle?

- Yes, if left unresolved, OBDII code C0156 can lead to further issues with the traction control system, potentially affecting vehicle stability and safety during driving.

9. Will resetting the OBDII code C0156 make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue causing the code is not addressed and repaired, the code is likely to reappear.

10. Is it necessary to visit a mechanic for OBDII code C0156, or can I fix it myself?

- While some DIY repairs are possible, it is recommended to consult a qualified mechanic for proper diagnosis and repair of OBDII code C0156 to ensure the issue is resolved correctly and safely.