AutoCodes – Cadillac – C0156 Cadillac

C0156 Cadillac 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 Cadillac 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 1,049

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

What does this mean?

What are the Possible Causes of the DTC C0156 Cadillac?

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 Cadillac?

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 Cadillac 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 Cadillac Code

What does OBDII code C0156 mean in a Cadillac?

C0156 indicates a malfunction in the Right TCS (Traction Control System) Solenoid #2 Circuit, which is part of the vehicle's stability control system.

What are the common symptoms of code C0156?

Symptoms may include the Traction Control System or ABS warning light illuminating, reduced traction control functionality, or difficulty maintaining stability on slippery surfaces.

What causes code C0156 in a Cadillac?

Common causes include a faulty TCS solenoid, damaged wiring or connectors in the circuit, corrosion in electrical components, or a malfunctioning ABS module.

Can I still drive my Cadillac with code C0156?

While the vehicle may still be drivable, the traction control system may not function properly, which could affect safety, especially in slippery or challenging driving conditions.

How is code C0156 diagnosed?

A mechanic will use a diagnostic scanner to confirm the code, inspect the wiring and connectors for damage, test the solenoid for proper operation, and check the ABS module for faults.

How do you fix code C0156?

Repairs typically involve replacing the faulty TCS solenoid, repairing or replacing damaged wiring, cleaning corroded connectors, or, in some cases, replacing the ABS module.

What tools are needed to fix code C0156?

Tools may include an OBDII scanner, multimeter for testing electrical circuits, and basic automotive repair tools for accessing and replacing components.

Is code C0156 specific to Cadillacs?

No, while code C0156 may be common in Cadillacs, it can occur in other vehicles that use similar traction control system designs.

How much does it cost to repair code C0156?

Repair costs vary depending on the specific issue but can range from $100 for minor wiring repairs to $500 or more if the solenoid or ABS module needs replacement.

Can neglecting code C0156 lead to other problems?

Yes, ignoring this code can result in reduced stability and traction control, potentially increasing the risk of accidents in slippery or hazardous driving conditions.