Engine-Codes.com
Engine-Codes – Pontiac – U1128 Pontiac

U1128 Pontiac Code - Lost Communications With Radio

Quick Answer

The U1128 code for Pontiac indicates that there is a communication error between the vehicle's onboard computer system and the radio unit. Common causes include Loose or damaged wiring connections between the radio unit and the vehicle's computer system, Faulty radio unit or computer module, Software glitch in the vehicle's system. 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
U1128 Pontiac indicates Lost Communications With Radio.
Common causes
Common causes include Loose or damaged wiring connections between the radio unit and the vehicle's computer system, Faulty radio unit or computer module, Software glitch in the vehicle's system.
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 19, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code U1128 Pontiac Description

The U1128 code for Pontiac indicates that there is a communication error between the vehicle's onboard computer system and the radio unit. This can lead to a loss of data exchange between the two components, resulting in the radio not functioning properly or not working at all. This issue can affect the vehicle's performance by causing distractions to the driver, especially if they rely on the radio for navigation or entertainment. It can also impact other systems that may be interconnected with the radio, such as the vehicle's sound system or Bluetooth connectivity. If not addressed, this communication error could potentially lead to further malfunctions in the vehicle's electronic systems, causing more severe issues in the long run.

OBDII Code U1128 Pontiac - Lost Communications With Radio
U1128 Pontiac Code - Lost Communications With Radio

Common Causes of U1128 Pontiac

  1. Loose or damaged wiring connections between the radio unit and the vehicle's computer system
  2. Faulty radio unit or computer module
  3. Software glitch in the vehicle's system
  4. Water damage to the radio unit
  5. Electrical interference from aftermarket accessories

Symptoms of U1128 Pontiac

  1. Radio screen blank or frozen
  2. No sound coming from the radio speakers
  3. Inability to change radio stations or modes
  4. Loss of Bluetooth connectivity
  5. Illumination of the radio-related warning light on the dashboard

How to Fix U1128 Pontiac

  1. Check and repair any loose or damaged wiring connections between the radio unit and the vehicle's computer system
  2. Test the radio unit and computer module for proper functionality and replace if necessary
  3. Update the vehicle's software to fix any glitches that may be causing the communication error
  4. Inspect for any water damage to the radio unit and repair or replace as needed
  5. Remove any aftermarket accessories that may be causing electrical interference with the radio system

Cost to Fix U1128 Pontiac

The typical repair costs for resolving a U1128 code related to lost communications with the radio in a Pontiac can vary depending on the specific issue and the labor rates at the auto repair shop. In general, the cost of parts for this repair could range from $100 to $500, while labor costs could range from $80 to $150 per hour. Therefore, the total repair cost could be anywhere from $200 to $800 or more. It's recommended to get a detailed diagnosis and estimate from a qualified mechanic to determine the exact cost for your specific vehicle.

Need more information about the U1128 Pontiac code?

Need more information on how to fix the U1128 Pontiac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1128 Pontiac code diagnosed by a professional: Find a repair shop in your area

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 U1128 Pontiac Code

1. What does the OBDII code U1128 mean on a Pontiac?

Code U1128 indicates that there is a communication failure between the vehicle's radio and other modules in the network.

2. What are the common symptoms of code U1128 in a Pontiac?

Common symptoms include the radio not functioning, loss of audio output, intermittent sound issues, or other infotainment system malfunctions.

3. What causes the U1128 code to appear on a Pontiac?

The code is typically caused by a faulty radio module, wiring or connector issues, a network communication problem, or a software glitch.

4. Can code U1128 affect other systems in my Pontiac?

Yes, communication issues with the radio can sometimes interfere with other modules like Bluetooth or navigation, but it usually does not impact critical driving functions.

5. How do I diagnose the U1128 code on my Pontiac?

Start by inspecting the radio module, checking for loose or damaged wiring and connectors, and using a scan tool to verify communication on the CAN bus network.

6. Is a faulty radio the only reason for the U1128 code?

No, other possible reasons include a bad CAN bus connection, failing control module, or outdated software in the radio or related systems.

7. Can I fix the U1128 code myself on my Pontiac?

If the issue is due to a loose connector or visible wiring damage, you may be able to fix it yourself. However, advanced diagnostics may require professional tools and expertise.

8. Will resetting the ECU clear the U1128 code on my Pontiac?

Resetting the ECU may temporarily clear the code, but the underlying issue must be resolved to prevent the code from returning.

9. What tools are needed to troubleshoot the U1128 code?

You’ll need an OBDII scan tool capable of reading manufacturer-specific codes and a multimeter to check for wiring issues.

10. How much does it cost to repair the U1128 code on a Pontiac?

Repair costs depend on the issue. Fixing wiring problems might cost $50-$200, while replacing the radio module could range from $300-$800, including parts and labor.

Discuss the causes and fixes for U1128 Pontiac OBDII Code

Submit a New Comment

Code U1128 Pontiac comments

No comments found for this page.