AutoCodes – Cadillac – U1048 Cadillac

U1048 Cadillac Code - Lost Communications With Rear Wheel Steering Control Module

Quick Answer

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Common causes include Faulty Rear Wheel Steering Control Module (RWSCM), Rear Wheel Steering Control Module harness is open or shorted, Rear Wheel Steering 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: U1048 Cadillac indicates Lost Communications With Rear Wheel Steering Control Module.
Common causes: Common causes include Faulty Rear Wheel Steering Control Module (RWSCM), Rear Wheel Steering Control Module harness is open or shorted, Rear Wheel Steering 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 476

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 22, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1048 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) U1048 is set.

OBDII Code U1048 Cadillac - Lost Communications With Rear Wheel Steering Control Module - AutoCodes.com — U1048 Cadillac Code - Lost Communications With Rear Wheel Steering Control Module

What does this mean?

What are the Possible Causes of the DTC U1048 Cadillac?

Faulty Rear Wheel Steering Control Module (RWSCM)
Rear Wheel Steering Control Module harness is open or shorted
Rear Wheel Steering Control Module circuit poor electrical connection

How to Fix the DTC U1048 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 U1048 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 U1048 Cadillac Code

1. What are the common symptoms of OBDII code U1048 in a Cadillac related to lost communications with the rear wheel steering control module?

The common symptoms include the rear wheel steering system not functioning properly, warning lights illuminated on the dashboard, and potential issues with vehicle stability at high speeds.

2. What are some possible causes of the U1048 code in a Cadillac indicating lost communications with the rear wheel steering control module?

Potential causes include a faulty rear wheel steering control module, damaged wiring or connectors, software issues, or a communication network problem within the vehicle.

3. How can I diagnose the U1048 code in my Cadillac related to the rear wheel steering control module communication loss?

Diagnosing the issue typically involves using a professional OBDII scanner to retrieve the specific fault code, checking the wiring and connectors for any damage, and verifying the communication network integrity within the vehicle.

4. Can I still drive my Cadillac with the U1048 code indicating lost communications with the rear wheel steering control module?

It is not recommended to drive the vehicle with this code present, as it may affect the rear wheel steering functionality and overall vehicle stability. It is best to have the issue diagnosed and repaired as soon as possible.

5. How can I reset the U1048 code in my Cadillac after addressing the communication loss with the rear wheel steering control module?

Once the underlying issue causing the code has been resolved, the code can be cleared using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes to reset the system.

6. Is it possible to repair the U1048 code related to lost communications with the rear wheel steering control module myself?

While some basic checks like inspecting wiring and connectors can be done by DIY enthusiasts, diagnosing and repairing the specific cause of the code may require professional automotive expertise and specialized tools.

7. Are there any specific maintenance tips to prevent the U1048 code from appearing in my Cadillac in the future?

Regularly inspecting the rear wheel steering system components, ensuring proper wiring connections, and keeping the vehicle's software up to date can help prevent issues leading to the U1048 code.

8. How much does it typically cost to repair the U1048 code indicating lost communications with the rear wheel steering control module in a Cadillac?

The cost of repairs can vary depending on the specific cause of the issue. It is recommended to consult with a qualified mechanic or dealership for an accurate diagnosis and cost estimate.

9. Can the U1048 code in a Cadillac be related to other vehicle systems or components, or is it specific to the rear wheel steering control module?

While the U1048 code is typically associated with the rear wheel steering control module, it can sometimes be triggered by issues in other communication modules or networks within the vehicle.

10. Will ignoring the U1048 code related to lost communications with the rear wheel steering control module lead to more severe problems in my Cadillac?

Ignoring the U1048 code can potentially result in further damage to the rear wheel steering system or compromise vehicle safety and handling. It is advisable to address the issue promptly to prevent any escalating problems.