AutoCodes – Cadillac – U1137 Cadillac

U1137 Cadillac Code - Lost Communications With Digital Radio Receiver

Quick Answer

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Common causes include Faulty Digital Radio Receiver (DRR), Digital Radio Receiver harness is open or shorted, Digital Radio Receiver 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: U1137 Cadillac indicates Lost Communications With Digital Radio Receiver.
Common causes: Common causes include Faulty Digital Radio Receiver (DRR), Digital Radio Receiver harness is open or shorted, Digital Radio Receiver 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 460

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 Apr 23, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1137 Cadillac Description

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification number of the module which sent the message for the state of health monitoring/node alive messages. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. Once an identification number is learned by a module, it will monitor for that module node alive message. Each module on the class 2 serial data circuit is required to send a Node Alive message every 2 seconds. When no message is detected from a learned identification number for 5 seconds, a Diagnostic Trouble Code (DTC) U1137 is set.

OBDII Code U1137 Cadillac - Lost Communications With Digital Radio Receiver - AutoCodes.com — U1137 Cadillac Code - Lost Communications With Digital Radio Receiver

What does this mean?

What are the Possible Causes of the DTC U1137 Cadillac?

Faulty Digital Radio Receiver (DRR)
Digital Radio Receiver harness is open or shorted
Digital Radio Receiver circuit poor electrical connection

How to Fix the DTC U1137 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 U1137 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 U1137 Cadillac Code

1. What are common symptoms of OBDII code U1137 in a Cadillac related to lost communications with the digital radio receiver?

- Common symptoms include loss of sound from the radio, display screen issues, and difficulty controlling radio functions.

2. What are some possible causes of OBDII code U1137 in a Cadillac?

- Possible causes include a faulty digital radio receiver, wiring issues, a blown fuse, or a malfunctioning communication module.

3. How can I diagnose the cause of OBDII code U1137 in my Cadillac?

- To diagnose the issue, you can start by checking the radio fuse, inspecting the wiring connections to the radio receiver, and using a diagnostic scan tool to retrieve specific error codes.

4. Can I still drive my Cadillac with OBDII code U1137 present?

- In most cases, it is safe to drive the vehicle with this code, but you may experience issues with the radio functionality. It is recommended to address the problem as soon as possible.

5. How can I reset OBDII code U1137 in my Cadillac?

- You can reset the code by using an OBDII scanner to clear the error codes after addressing the underlying issue with the digital radio receiver communication.

6. Is it possible to repair OBDII code U1137 in a Cadillac myself?

- Depending on your level of automotive expertise, you may be able to repair the issue yourself by checking and repairing the radio receiver connections or replacing the faulty components.

7. What should I do if I can't fix OBDII code U1137 in my Cadillac on my own?

- If you are unable to diagnose or repair the issue yourself, it is recommended to seek assistance from a qualified mechanic or dealership to properly address the communication problem.

8. Are there any specific repair tips for resolving OBDII code U1137 in a Cadillac?

- One helpful tip is to check for any loose or damaged wiring connections related to the digital radio receiver, as these can often be a common cause of communication issues.

9. Will fixing OBDII code U1137 improve my Cadillac's overall performance?

- While this code specifically relates to the digital radio receiver communication, addressing the issue can improve the functionality of the radio system and enhance the overall driving experience.

10. How can I prevent OBDII code U1137 from reoccurring in my Cadillac?

- To prevent the code from reoccurring, it is important to properly maintain the digital radio receiver and its related components, as well as ensuring all wiring connections are secure and free of damage.