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Engine-Codes – GMC – U0133 GMC

U0133 GMC Code - Lost Communication With Air Suspension Control Module

Quick Answer

The U0133 diagnostic trouble code (DTC) for GMC vehicles indicates that there has been a loss of communication with the Air Suspension Control Module. Common causes include Faulty Air Suspension Control Module, Wiring issues or loose connections, Corrosion or damage to the wiring harness. 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
U0133 GMC indicates Lost Communication With Air Suspension Control Module.
Common causes
Common causes include Faulty Air Suspension Control Module, Wiring issues or loose connections, Corrosion or damage to the wiring harness.
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 13, 2024
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Code U0133 GMC Description

The U0133 diagnostic trouble code (DTC) for GMC vehicles indicates that there has been a loss of communication with the Air Suspension Control Module. The Air Suspension Control Module is responsible for controlling the vehicle's air suspension system, which helps to provide a smoother ride by adjusting the suspension based on road conditions and vehicle load. When communication with this module is lost, it can lead to issues with the proper functioning of the air suspension system.

OBDII Code U0133 GMC - Lost Communication With Air Suspension Control Module
U0133 GMC Code - Lost Communication With Air Suspension Control Module

Common Causes of U0133 GMC

  1. Faulty Air Suspension Control Module
  2. Wiring issues or loose connections
  3. Corrosion or damage to the wiring harness
  4. Issues with the vehicle's computer system
  5. Electrical interference or communication errors

Symptoms of U0133 GMC

  1. Rough or bumpy ride
  2. Suspension system not adjusting properly
  3. Warning light on the dashboard related to the suspension system
  4. Vehicle sitting lower or higher than usual

How to Fix U0133 GMC

  1. Begin by conducting a thorough inspection of the wiring harness and connections to the Air Suspension Control Module to check for any damage or loose connections.
  2. Test the Air Suspension Control Module to determine if it is functioning properly or needs to be replaced.
  3. Check for any corrosion on the wiring harness and address any issues found.
  4. Reset the vehicle's computer system to see if communication can be restored with the Air Suspension Control Module.
  5. If necessary, replace the Air Suspension Control Module and reprogram it to ensure proper communication with the vehicle's computer system.

Cost to Fix U0133 GMC

The typical repair costs for addressing a U0133 code can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of parts for replacing the Air Suspension Control Module can range from $200 to $600, while labor costs can range from $100 to $300. Additional costs may be incurred for diagnostic testing and any necessary repairs to the wiring harness or connections. It is recommended to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on the specific circumstances of the vehicle. Labor rates at auto repair shops can vary widely, so it is advisable to research local rates to determine the total cost of the repair.

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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 U0133 GMC Code

1. What are the common symptoms of OBDII code U0133 GMC (Lost Communication With Air Suspension Control Module)?

- Common symptoms include malfunctioning air suspension system, illuminated warning lights (such as the check engine light or suspension warning light), and issues with ride quality.

2. What are the possible causes of OBDII code U0133 GMC?

- The code U0133 GMC can be triggered by issues such as a faulty air suspension control module, damaged wiring or connectors, communication network issues, or a malfunctioning powertrain control module (PCM).

3. How can I diagnose the cause of OBDII code U0133 GMC?

- Diagnosing the code typically involves using a professional OBDII scanner to retrieve the specific fault codes, checking the wiring and connectors for damage, testing the air suspension control module, and ensuring proper communication on the network.

4. What are some repair tips for resolving OBDII code U0133 GMC?

- Repair tips include repairing or replacing damaged wiring or connectors, resetting the air suspension control module, reprogramming modules if necessary, and ensuring all components are properly connected and functioning.

5. Can OBDII code U0133 GMC be fixed at home, or do I need a professional mechanic?

- While some basic troubleshooting steps can be done at home, resolving OBDII code U0133 GMC may require professional diagnostic equipment and expertise, especially when dealing with complex communication network issues.

6. Is it safe to drive with OBDII code U0133 GMC active?

- It is not recommended to drive with the code active, as it can affect the performance and safety of the air suspension system. It is advisable to address the issue promptly to prevent further damage.

7. Will resetting the OBDII code U0133 GMC make it go away permanently?

- Resetting the code may temporarily clear the warning lights, but if the underlying issue is not resolved, the code is likely to reappear. It is important to diagnose and fix the root cause of the problem.

8. How much does it typically cost to repair OBDII code U0133 GMC at a dealership or repair shop?

- The cost of repairing the code can vary depending on the specific issue, labor rates, and parts required. It is advisable to obtain quotes from different shops and dealerships to compare prices.

9. Can a weak car battery cause OBDII code U0133 GMC to appear?

- Yes, a weak or failing car battery can sometimes cause communication errors and trigger codes like U0133 GMC. It is recommended to ensure the battery is in good condition when diagnosing this issue.

10. Are there any recalls or technical service bulletins related to OBDII code U0133 GMC for GMC vehicles?

- It is advisable to check with the manufacturer or a dealership for any recalls or technical service bulletins related to OBDII code U0133 GMC for specific GMC vehicle models.

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