U0137 Cadillac Code - Lost Communication with Trailer Brake Control Module
Quick Answer
The U0137 diagnostic trouble code (DTC) for Cadillac vehicles indicates that there is a communication error between the vehicle's onboard computer system and the trailer brake control module. Common causes include Faulty wiring connections between the vehicle and the trailer brake control module, Damaged communication module in either the vehicle or the trailer brake control module, Corrosion or debris in the electrical connectors. 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
- U0137 Cadillac indicates Lost Communication with Trailer Brake Control Module.
- Common causes
- Common causes include Faulty wiring connections between the vehicle and the trailer brake control module, Damaged communication module in either the vehicle or the trailer brake control module, Corrosion or debris in the electrical connectors.
- 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 U0137 Cadillac Description
The U0137 diagnostic trouble code (DTC) for Cadillac vehicles indicates that there is a communication error between the vehicle's onboard computer system and the trailer brake control module. The trailer brake control module is responsible for managing the braking functions of a trailer that is being towed by the vehicle. When communication is lost between the two systems, it can lead to a variety of issues related to the trailer brake system.
Common Causes of U0137 Cadillac
- Faulty wiring connections between the vehicle and the trailer brake control module
- Damaged communication module in either the vehicle or the trailer brake control module
- Corrosion or debris in the electrical connectors
- Malfunctioning sensor in the trailer brake system
- Software issues in the vehicle's onboard computer system
Symptoms of U0137 Cadillac
- Illumination of the trailer brake warning light on the dashboard
- Inability to activate or control the trailer brakes while towing
- Decreased braking performance when towing a trailer
- Erratic behavior of the trailer brake system
How to Fix U0137 Cadillac
- Conduct a thorough inspection of the wiring connections between the vehicle and the trailer brake control module
- Check for any damage or corrosion in the electrical connectors and clean or replace them as needed
- Test the communication module in both the vehicle and the trailer brake control module for functionality
- Inspect and replace any malfunctioning sensors in the trailer brake system
- Update the software in the vehicle's onboard computer system to ensure compatibility with the trailer brake control module
Cost to Fix U0137 Cadillac
The typical repair costs for addressing a U0137 code on a Cadillac could range from $200 to $500, including parts and labor. However, it's important to note that the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It is advisable to obtain a detailed estimate from a local auto repair shop to get a more accurate cost assessment.
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Frequently Asked Questions about U0137 Cadillac Code
1. What does the OBDII code U0137 mean on a Cadillac?
U0137 indicates a loss of communication between the vehicle's main control modules and the Trailer Brake Control Module (TBCM).
2. What are the common symptoms of code U0137 on a Cadillac?
Symptoms may include the trailer brake system not functioning, warning lights on the dashboard, or an inability to detect the trailer.
3. What causes the U0137 code to appear on a Cadillac?
Common causes include damaged wiring, a faulty Trailer Brake Control Module, poor electrical connections, or issues with the CAN bus network.
4. Can I still drive my Cadillac with the U0137 code?
Yes, you can still drive the vehicle, but the trailer brake system may not work, which can be unsafe if towing a trailer.
5. How do I diagnose the U0137 code on my Cadillac?
Start by inspecting the wiring, connectors, and fuses for the TBCM. Use a scan tool to check for additional codes and test the CAN bus network for communication issues.
6. Is a faulty Trailer Brake Control Module the only cause of U0137?
No, other causes include damaged wiring, corroded connectors, or a malfunction in related control modules.
7. How much does it cost to repair the U0137 code on a Cadillac?
Repair costs vary but can range from $100 for simple wiring repairs to $500 or more if the TBCM needs replacement.
8. Can I fix the U0137 code on my Cadillac myself?
If you’re experienced with electrical systems, you can inspect and repair wiring or connectors. However, module replacement or advanced diagnostics may require a professional.
9. Does clearing the U0137 code fix the problem?
Clearing the code resets the system temporarily, but the underlying issue must be resolved to prevent the code from returning.
10. What tools are needed to address the U0137 code on a Cadillac?
You'll need an OBDII scanner, a multimeter for electrical testing, and potentially a repair manual for wiring diagrams specific to your Cadillac model.
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