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U0073 Pontiac Code - Control Module Communication Bus OFF

Quick Answer

The U0073 code for Pontiac indicates that there is a malfunction in the Control Module Communication Bus, specifically that the communication bus has been turned off. Common causes include Faulty wiring or connectors in the communication bus, Malfunctioning control modules, Software issues in the vehicle's computer 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
U0073 Pontiac indicates Control Module Communication Bus OFF.
Common causes
Common causes include Faulty wiring or connectors in the communication bus, Malfunctioning control modules, Software issues in the vehicle's computer 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 Sep 11, 2024
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Code U0073 Pontiac Description

The U0073 code for Pontiac indicates that there is a malfunction in the Control Module Communication Bus, specifically that the communication bus has been turned off. In modern vehicles, the various control modules communicate with each other through a network known as the Controller Area Network (CAN). This network allows different systems in the vehicle to share information and work together effectively. When the communication bus is turned off, it means there is a disruption in the flow of information between these modules.

OBDII Code U0073 Pontiac - Control Module Communication Bus OFF
U0073 Pontiac Code - Control Module Communication Bus OFF

Common Causes of U0073 Pontiac

  1. Faulty wiring or connectors in the communication bus
  2. Malfunctioning control modules
  3. Software issues in the vehicle's computer system
  4. Water damage or corrosion in the wiring
  5. Electrical interference from aftermarket accessories or modifications

Symptoms of U0073 Pontiac

  1. Check Engine Light illuminated on the dashboard
  2. Loss of communication with various control modules
  3. Erratic or rough engine performance
  4. Problems with transmission shifting
  5. Difficulty starting the vehicle

How to Fix U0073 Pontiac

  1. Perform a thorough inspection of the wiring and connectors in the communication bus
  2. Check for any damaged or corroded wires and replace as needed
  3. Scan the vehicle's computer system for any fault codes and address them accordingly
  4. Test the control modules for proper functionality and replace any faulty units
  5. Clear the code, reset the vehicle's computer system, and test drive to ensure the issue has been resolved

Cost to Fix U0073 Pontiac

The cost of repairing the U0073 code in a Pontiac can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, the parts and labor for this type of repair can range from $200 to $500. It's important to keep in mind that diagnostic time and labor rates at auto repair shops can vary, so it's advisable to obtain quotes from multiple shops to get a more accurate estimate for your specific vehicle.

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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 U0073 Pontiac Code

1. What does the OBDII code U0073 on a Pontiac mean?

The code U0073 indicates a communication bus OFF error related to the control module in your Pontiac.

2. What are the common symptoms of U0073 in a Pontiac?

Common symptoms of the U0073 code may include dashboard warning lights, loss of communication with various control modules, and issues with vehicle systems like power steering or transmission.

3. What are the possible causes of the U0073 code in a Pontiac?

Possible causes of the U0073 code include damaged wiring, faulty control modules, software issues, loose connections, or a malfunctioning communication network.

4. How can I diagnose the U0073 code in my Pontiac?

Diagnosing the U0073 code involves using an OBDII scanner to retrieve the error code, checking the communication network for faults, inspecting wiring and connections, and testing control modules for proper function.

5. Can I continue to drive my Pontiac with the U0073 code present?

It is not recommended to drive your Pontiac with the U0073 code present, as it can lead to potential safety hazards and further damage to vehicle systems.

6. How can I repair the U0073 code in my Pontiac?

Repairing the U0073 code typically involves addressing the root cause of the communication bus OFF error, which may include repairing or replacing damaged wiring, fixing loose connections, or replacing faulty control modules.

7. Will resetting the U0073 code make it go away permanently?

Resetting the U0073 code may temporarily clear the error, but if the underlying issue is not addressed, the code is likely to reappear once the vehicle is driven again.

8. Can a DIY enthusiast fix the U0073 code in a Pontiac?

DIY enthusiasts with the necessary tools and knowledge of automotive systems may be able to diagnose and repair the U0073 code, but it is recommended to seek professional help for complex electrical issues.

9. How much does it cost to fix the U0073 code in a Pontiac?

The cost of fixing the U0073 code in a Pontiac can vary depending on the specific cause of the issue, the extent of repairs needed, and whether you choose to do the repairs yourself or seek help from a mechanic.

10. Is the U0073 code a common problem in Pontiac vehicles?

The U0073 code related to control module communication bus OFF can be encountered in various Pontiac models, especially in older vehicles or those with underlying electrical issues.

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