AutoCodes – Buick – C1595 Buick

C1595 Buick Code - Trailer Brake Signal to Trailer Brake Power Control Module Circuit Malfunction

Quick Answer

The Chassis Control Module-Auxiliary receives inputs from the Trailer Brake Power Control Module; these inputs are used to determine trailer connection and the amount of voltage supplied to the trailer brakes. Common causes include Faulty Trailer Brake Power Control Module, Trailer Brake Power Control Module harness is open or shorted, Trailer Brake Power Control Module 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: C1595 Buick indicates Trailer Brake Signal to Trailer Brake Power Control Module Circuit Malfunction.
Common causes: Common causes include Faulty Trailer Brake Power Control Module, Trailer Brake Power Control Module harness is open or shorted, Trailer Brake Power Control Module 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 244

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 Jul 17, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1595 Buick Description

The Chassis Control Module-Auxiliary receives inputs from the Trailer Brake Power Control Module; these inputs are used to determine trailer connection and the amount of voltage supplied to the trailer brakes. The Diagnostic Trouble Code (DTC) will be set when the Trailer Brake Power Control Module detects a short to ground, open, or a short to voltage on the trailer brake control signal circuit.

OBDII Code C1595 Buick - Trailer Brake Signal to Trailer Brake Power Control Module Circuit Malfunction - AutoCodes.com — C1595 Buick Code - Trailer Brake Signal to Trailer Brake Power Control Module Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC C1595 Buick?

Faulty Trailer Brake Power Control Module
Trailer Brake Power Control Module harness is open or shorted
Trailer Brake Power Control Module circuit poor electrical connection
Faulty Chassis Control Module-Auxiliary

How to Fix the DTC C1595 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 C1595 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.

Need more information about the C1595 Buick code?

Need more information on how to fix the C1595 Buick code? Get Access to Factory Service Manuals

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 C1595 Buick Code

1. What does the OBDII code C1595 mean for a Buick?

Code C1595 indicates a malfunction in the trailer brake signal circuit to the Trailer Brake Power Control Module.

2. What are the common symptoms of code C1595 in a Buick?

Symptoms may include a warning light on the dashboard, the trailer brakes not functioning properly, or error messages related to trailer brake performance.

3. What causes code C1595 in a Buick?

Common causes include damaged wiring, corroded connectors, a faulty Trailer Brake Power Control Module, or issues with the trailer brake signal circuit.

4. Can I still drive my Buick with code C1595?

Yes, you can drive the vehicle, but the trailer braking system may not function correctly, which can pose a safety risk when towing.

5. How do I diagnose the C1595 code in my Buick?

Start by inspecting the trailer brake wiring and connectors for damage or corrosion, then check for proper voltage and continuity in the circuit. A scan tool can further pinpoint the issue.

6. How is the C1595 code repaired in a Buick?

Repairs may involve fixing or replacing damaged wiring, cleaning corroded connectors, or replacing a faulty Trailer Brake Power Control Module.

7. Can a blown fuse trigger the C1595 code in a Buick?

Yes, a blown fuse in the trailer brake circuit can disrupt the signal and trigger the C1595 code.

8. Do I need to replace the Trailer Brake Power Control Module to fix code C1595?

Not always. The module may not need replacement if the issue is caused by wiring or connector problems. Proper diagnosis is crucial before replacing the module.

9. Will disconnecting the trailer clear the C1595 code?

Disconnecting the trailer may temporarily stop the symptoms, but the code will remain stored in the vehicleâ€™s memory until the underlying issue is resolved.

10. How much does it cost to fix code C1595 in a Buick?

Repair costs vary depending on the issue, ranging from $50 to $200 for wiring repairs or connector replacements, and up to $500 or more for a new control module.