AutoCodes – Cadillac – C0146 Cadillac

C0146 Cadillac Code - Left 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: C0146 Cadillac indicates Left 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 1,043

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 C0146 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 C0146 Cadillac - Left TCS Solenoid #2 Circuit Malfunction - AutoCodes.com — C0146 Cadillac Code - Left TCS Solenoid #2 Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC C0146 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 C0146 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 C0146 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 C0146 Cadillac Code

1. What does the OBDII code C0146 on a Cadillac mean?

The C0146 code indicates a "Left TCS Solenoid #2 Circuit Malfunction," meaning there's an issue with the traction control system (TCS) solenoid circuit on the left side of the vehicle.

2. What are the common symptoms of the C0146 code on a Cadillac?

Common symptoms include the ABS or traction control warning light being on, reduced traction control functionality, and possible issues with braking performance.

3. What causes the C0146 code to appear?

Possible causes include a damaged or faulty TCS solenoid, corroded or damaged wiring, a bad electrical connection, or a malfunctioning ABS module.

4. Can I drive my Cadillac with the C0146 code?

While you can still drive the vehicle, it is not recommended as the traction control system may not function properly, increasing the risk of losing control in low-traction conditions.

5. How can I diagnose the C0146 code on my Cadillac?

Diagnosis involves scanning for codes with an OBDII scanner, visually inspecting the wiring and connectors for damage or corrosion, and testing the solenoid circuit with a multimeter.

6. How do I fix the C0146 code on a Cadillac?

Repairs may include replacing the faulty TCS solenoid, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the ABS module if necessary.

7. How much does it cost to fix the C0146 code?

Repair costs can vary but typically range from $150 to $500, depending on whether wiring repairs, part replacements, or module diagnostics are required.

8. Can a weak battery cause the C0146 code?

Yes, a weak or failing battery can cause voltage issues that may trigger this code, so checking the battery's health is recommended.

9. Does the C0146 code affect the ABS system?

Yes, since the traction control system works closely with the ABS, a malfunction in the TCS solenoid circuit may also impact ABS functionality.

10. How can I prevent the C0146 code from occurring again?

Regular maintenance, including inspecting the TCS and ABS wiring, keeping electrical connectors clean and secure, and addressing warning lights promptly, can help prevent this code from reappearing.