AutoCodes – Chevrolet – U0248 Chevrolet

U0248 Chevrolet 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 Chevrolet 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 1,071

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

What does this mean?

What are the Possible Causes of the DTC U0248 Chevrolet?

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 Chevrolet?

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 Chevrolet 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 Chevrolet Code

1. What are the common symptoms of OBDII code U0248 in a Chevrolet related to Lost Communication With Remote Accessory Module?

- Common symptoms include issues with remote keyless entry, power door locks, and other remote accessory functions not working properly.

2. What are some possible causes of OBDII code U0248 in a Chevrolet?

- Possible causes may include a faulty remote accessory module, damaged wiring or connectors, low battery voltage, or a communication network issue.

3. How can I diagnose the cause of OBDII code U0248 in my Chevrolet?

- Diagnosing this code typically involves checking the remote accessory module, inspecting wiring and connectors for damage, testing battery voltage, and using a scan tool to check for communication network problems.

4. Can I still drive my Chevrolet with OBDII code U0248 present?

- While it may be possible to drive the vehicle with this code, it is recommended to address the issue promptly to ensure proper functionality of remote accessory features.

5. How can I repair OBDII code U0248 in my Chevrolet?

- Repairs for this code often involve replacing a faulty remote accessory module, repairing damaged wiring or connectors, ensuring proper battery voltage, and addressing any communication network issues.

6. Is it safe to reset the OBDII code U0248 in my Chevrolet using a scan tool?

- Yes, it is safe to reset the code using a scan tool after addressing the underlying issue causing the communication problem with the remote accessory module.

7. Can a DIY enthusiast fix OBDII code U0248 in a Chevrolet?

- Depending on the root cause of the issue, DIY enthusiasts may be able to address simple problems like checking connections or replacing a module. However, more complex diagnostics and repairs may require professional assistance.

8. How can I prevent OBDII code U0248 from occurring in my Chevrolet in the future?

- Regularly maintaining the remote accessory system, ensuring proper battery health, and promptly addressing any issues with remote features can help prevent the recurrence of this code.

9. Will fixing OBDII code U0248 improve the overall performance of my Chevrolet?

- Fixing this code will primarily restore proper functionality of remote accessory features and may improve convenience and usability, but it is unlikely to significantly impact the overall performance of the vehicle.

10. Are there any recalls or technical service bulletins related to OBDII code U0248 in Chevrolet vehicles?

- It is recommended to check with a Chevrolet dealership or refer to the manufacturer's website to see if there are any relevant recalls or technical service bulletins addressing OBDII code U0248 and related issues.