AutoCodes – Buick – C0156 Buick

C0156 Buick 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 Buick 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 868

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

What does this mean?

What are the Possible Causes of the DTC C0156 Buick?

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 Buick?

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 Buick 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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Need Help with the 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 C0156 Buick Code

What does the OBDII code C0156 mean for a Buick?

C0156 indicates a malfunction in the Right TCS (Traction Control System) Solenoid #2 Circuit, which can affect the vehicle's traction and stability control functions.

What are the common symptoms of code C0156 in a Buick?

Common symptoms include the ABS or traction control warning light illuminating, reduced traction control functionality, or noticeable handling issues in slippery conditions.

What causes the C0156 code to appear on a Buick?

Typical causes include a faulty TCS solenoid, damaged or corroded wiring or connectors in the solenoid circuit, or a malfunctioning ABS control module.

How does a faulty TCS solenoid affect the vehicle?

A faulty TCS solenoid can prevent the traction control system from properly managing wheel spin, reducing stability and traction in adverse driving conditions.

Can I drive my Buick with the C0156 code active?

While the vehicle may still be drivable, traction control and ABS performance may be compromised, increasing the risk of losing control in slippery or emergency situations.

How is the C0156 code diagnosed on a Buick?

A technician will use a scan tool to confirm the code, inspect the wiring and connectors for damage or corrosion, and test the solenoid and related components for proper operation.

What tools are needed to repair the C0156 code?

Diagnostic tools such as an OBDII scanner, a multimeter for testing electrical circuits, and basic hand tools are typically required for troubleshooting and repairs.

How much does it cost to fix a C0156 code on a Buick?

Repair costs vary depending on whether the issue is with the solenoid, wiring, or ABS module. Typical repairs can range from $100 to $500, including parts and labor.

Can a C0156 code clear itself without repair?

No, the code will not clear itself unless the underlying issue is resolved. Once repaired, the code can be cleared with an OBDII scanner.

What preventive measures can help avoid a C0156 code?

Regular inspection and maintenance of the ABS and traction control system, including checking for damaged wiring and ensuring connectors are clean and secure, can help prevent this code.