AutoCodes – Generic – U103A

U103A Code - CAN Audio And Telematics Bus Electrical Diagnostic

Quick Answer

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Common causes include Faulty Telematics Gateway, Telematics Gateway harness is open or shorted, Telematics Gateway 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: U103A indicates CAN Audio And Telematics Bus Electrical Diagnostic.
Common causes: Common causes include Faulty Telematics Gateway, Telematics Gateway harness is open or shorted, Telematics Gateway 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 1,190

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 U103A 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 State of Health monitoring. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. When a module does not associate an identification number with at least one critical parameter within 5 seconds of beginning serial data communication, the Diagnostic Trouble Code (DTC) is set.

OBDII Code U103A - CAN Audio And Telematics Bus Electrical Diagnostic - AutoCodes.com — U103A Code - CAN Audio And Telematics Bus Electrical Diagnostic

What does this mean?

What are the Possible Causes of the DTC U103A?

Faulty Telematics Gateway
Telematics Gateway harness is open or shorted
Telematics Gateway circuit poor electrical connection

How to Fix the DTC U103A?

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 U103A 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 U103A code?

Need more information on how to fix the U103A code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U103A code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U103A Chrysler — CAN Audio And Telematics Bus Electrical Diagnostic
U103A Dodge — CAN Audio And Telematics Bus Electrical Diagnostic
U103A Jeep — CAN Audio And Telematics Bus Electrical Diagnostic
U103A RAM — CAN Audio And Telematics Bus Electrical Diagnostic

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 U103A Code

1. What are the common symptoms of OBDII code U103A?

The common symptoms of OBDII code U103A include issues with the audio system, telematics system, or communication problems with these systems.

2. What can cause the OBDII code U103A to trigger?

The OBDII code U103A may be triggered by electrical faults in the CAN (Controller Area Network) related to the audio and telematics systems, such as wiring issues or a faulty control module.

3. How can I diagnose the OBDII code U103A?

Diagnosing the OBDII code U103A involves using a diagnostic scanner to retrieve the code, checking the wiring and connectors related to the audio and telematics systems, and performing a thorough inspection of the control modules.

4. What are some repair tips for resolving OBDII code U103A?

Repair tips for resolving OBDII code U103A include checking and repairing any damaged wiring, ensuring proper connections, and replacing any faulty control modules related to the audio and telematics systems.

5. Can OBDII code U103A be a serious issue?

While OBDII code U103A may not directly affect the drivability of the vehicle, it can impact the functionality of the audio and telematics systems, which are important for convenience and entertainment purposes.

6. Is it safe to continue driving with OBDII code U103A present?

It is generally safe to continue driving with OBDII code U103A present, but it is recommended to address the issue promptly to avoid any further complications with the audio and telematics systems.

7. Can a DIY enthusiast repair OBDII code U103A?

DIY enthusiasts with knowledge of automotive electrical systems may be able to repair OBDII code U103A by following diagnostic procedures and repair tips, but professional help may be needed for more complex issues.

8. How long does it typically take to repair OBDII code U103A?

The time to repair OBDII code U103A can vary depending on the underlying cause, but it may take anywhere from a few hours to a day to diagnose and fix the issue related to the audio and telematics systems.

9. Are there any preventive measures to avoid OBDII code U103A?

Regular maintenance and inspections of the audio and telematics systems, as well as checking the wiring and connectors for any signs of wear or damage, can help prevent OBDII code U103A from occurring.

10. Can resetting the OBDII system clear the U103A code?

Resetting the OBDII system may temporarily clear the U103A code, but if the underlying issue is not addressed, the code is likely to reappear. It is important to diagnose and repair the root cause of the problem to prevent the code from returning.