AutoCodes – Cadillac – U0248 Cadillac

U0248 Cadillac Code - Lost Communication With Remote Accessory Module

Quick Answer

Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Remote Accessory Module, Remote Accessory Module harness is open or shorted, Remote Accessory 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: U0248 Cadillac indicates Lost Communication With Remote Accessory Module.
Common causes: Common causes include Faulty Remote Accessory Module, Remote Accessory Module harness is open or shorted, Remote Accessory 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 636

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 05, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0248 Cadillac Description

Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The modules 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 module as an availability indication of the transmitter module. The supervision time-out period is 250 ms. Each message contains the identification number of the transmitter module. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Remote Accessory Module has not been received.

OBDII Code U0248 Cadillac - Lost Communication With Remote Accessory Module - AutoCodes.com — U0248 Cadillac Code - Lost Communication With Remote Accessory Module

What does this mean?

What are the Possible Causes of the DTC U0248 Cadillac?

Faulty Remote Accessory Module
Remote Accessory Module harness is open or shorted
Remote Accessory Module circuit poor electrical connection

How to Fix the DTC U0248 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 U0248 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 U0248 Cadillac Code

1. What are the common symptoms of OBDII code U0248 in a Cadillac related to lost communication with the Remote Accessory Module?

- Common symptoms include issues with remote key fob functionality, power accessories not working properly, and warning lights on the dashboard.

2. What are some possible causes of the U0248 code in a Cadillac?

- Possible causes include a faulty Remote Accessory Module, wiring or connection issues, a drained car battery, or a software glitch.

3. How can I diagnose the U0248 code in my Cadillac?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, checking for other related codes, inspecting wiring and connections, and testing the Remote Accessory Module.

4. Can I drive my Cadillac with the U0248 code present?

- It is generally safe to drive your Cadillac with the U0248 code, but it is recommended to address the issue promptly to avoid potential inconvenience or safety concerns.

5. How can I repair the U0248 code in my Cadillac?

- Repair options may include resetting the Remote Accessory Module, checking and repairing wiring or connections, replacing the Remote Accessory Module, or updating software as per manufacturer recommendations.

6. Is it possible to reset the U0248 code in a Cadillac without professional help?

- In some cases, you may be able to reset the code by disconnecting the car battery for a few minutes and reconnecting it. However, if the issue persists, it is advisable to seek professional assistance.

7. Will the U0248 code cause permanent damage to my Cadillac?

- The U0248 code itself is not likely to cause permanent damage to your Cadillac, but ignoring the underlying issue could lead to further complications over time.

8. Can extreme weather conditions trigger the U0248 code in a Cadillac?

- Yes, extreme temperature variations or weather conditions can sometimes affect the communication between the Remote Accessory Module and the vehicle's system, triggering the U0248 code.

9. How long does it typically take to repair the U0248 code in a Cadillac?

- The repair time for the U0248 code can vary depending on the specific cause of the issue. Simple fixes like resetting the module may take a short time, while more complex repairs could require more time.

10. Are there any preventive measures to avoid encountering the U0248 code in a Cadillac?

- To prevent the U0248 code, regular maintenance checks, keeping the car battery charged, and addressing any warning signs promptly can help avoid communication issues with the Remote Accessory Module.