AutoCodes – Generic – U2137

U2137 Code - Lost Communications With Vehicle Theft Deterrent Module

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Vehicle Theft Deterrent Module, Vehicle Theft Deterrent Module harness is open or shorted, Vehicle Theft Deterrent 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: U2137 indicates Lost Communications With Vehicle Theft Deterrent Module.
Common causes: Common causes include Faulty Vehicle Theft Deterrent Module, Vehicle Theft Deterrent Module harness is open or shorted, Vehicle Theft Deterrent 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 4,296

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 Jun 16, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U2137 Description

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices. The devices have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver device as an availability indication of the transmitter device. Each message contains the identification number of the transmitter device. A loss of serial data communications Diagnostic Trouble Code (DTC) does not represent a failure of the devices that contain the stored code. The DTC will set when a supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U2137 - Lost Communications With Vehicle Theft Deterrent Module - AutoCodes.com — U2137 Code - Lost Communications With Vehicle Theft Deterrent Module

What does this mean?

What are the Possible Causes of the DTC U2137?

Faulty Vehicle Theft Deterrent Module
Vehicle Theft Deterrent Module harness is open or shorted
Vehicle Theft Deterrent Module circuit poor electrical connection

How to Fix the DTC U2137?

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 U2137 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 U2137 code?

Need more information on how to fix the U2137 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U2137 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U2137 Buick — Lost Communications With Vehicle Theft Deterrent Module
U2137 Cadillac — Lost Communications With Vehicle Theft Deterrent Module
U2137 Chevrolet — Lost Communications With Vehicle Theft Deterrent Module
U2137 GMC — Lost Communications With Vehicle Theft Deterrent Module
U2137 Pontiac — Lost Communications With Vehicle Theft Deterrent Module
U2137 Saturn — Lost Communications With Vehicle Theft Deterrent Module

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 U2137 Code

1. What are the common symptoms of OBDII code U2137 - Lost Communications With Vehicle Theft Deterrent Module?

- Common symptoms include the inability to start the vehicle, the security light staying on, and issues with the door locks or alarm system.

2. What are possible causes of OBDII code U2137?

- Possible causes may include a faulty vehicle theft deterrent module, a damaged wiring harness, loose connections, or a malfunctioning control module.

3. How can I diagnose OBDII code U2137?

- Diagnosing this code typically involves checking the connections to the vehicle theft deterrent module, inspecting the wiring for any damage, and using a diagnostic scanner to communicate with the module.

4. Can OBDII code U2137 be cleared/reset, or does it require repair?

- Clearing the code may temporarily resolve the issue, but it is important to address the underlying cause to prevent the code from reappearing. Repairing the module or fixing any wiring issues is recommended.

5. Is it safe to continue driving with OBDII code U2137 present?

- It is not recommended to continue driving with this code active, as it may affect the vehicle's security system and potentially lead to starting or security issues.

6. Are there any DIY repair tips for fixing OBDII code U2137?

- DIY repair tips may include checking and securing the connections to the vehicle theft deterrent module, inspecting the wiring for damage, and ensuring all components are properly connected.

7. How much does it cost to repair OBDII code U2137?

- The cost of repairing this code can vary depending on the underlying issue. It may range from a simple fix like securing loose connections to replacing the vehicle theft deterrent module, which can be more expensive.

8. Can a mechanic easily fix OBDII code U2137, or is it a complex issue?

- A mechanic with experience in diagnosing and repairing electrical issues should be able to address OBDII code U2137. The complexity of the repair will depend on the specific cause of the communication loss.

9. Will OBDII code U2137 cause any long-term damage to the vehicle if left unaddressed?

- Leaving this code unaddressed may lead to further issues with the vehicle's security system and potentially impact its overall functionality. It is advisable to resolve the problem promptly.

10. Is it common for OBDII code U2137 to recur even after repairs?

- Recurrence of the code is possible if the root cause of the communication loss is not properly resolved. Thorough diagnosis and repair are essential to prevent the code from coming back.