AutoCodes – Cadillac – U0133 Cadillac

U0133 Cadillac Code - Lost Communication With Air Suspension Control 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 Air Suspension Control Module, Air Suspension Control Module harness is open or shorted, Air Suspension Control 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: U0133 Cadillac indicates Lost Communication With Air Suspension Control Module.
Common causes: Common causes include Faulty Air Suspension Control Module, Air Suspension Control Module harness is open or shorted, Air Suspension Control 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 505

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 01, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0133 Cadillac 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 Air Suspension Control Module has not been received.

OBDII Code U0133 Cadillac - Lost Communication With Air Suspension Control Module - AutoCodes.com — U0133 Cadillac Code - Lost Communication With Air Suspension Control Module

What does this mean?

What are the Possible Causes of the DTC U0133 Cadillac?

Faulty Air Suspension Control Module
Air Suspension Control Module harness is open or shorted
Air Suspension Control Module circuit poor electrical connection

How to Fix the DTC U0133 Cadillac?

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 U0133 Cadillac 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 U0133 Cadillac Code

1. What are the common symptoms of OBDII code U0133 in a Cadillac related to the air suspension control module?

- Common symptoms include a suspension warning light on the dashboard, uneven ride height, and loss of control over the vehicle's suspension settings.

2. What are the possible causes of the U0133 code indicating lost communication with the air suspension control module in a Cadillac?

- Possible causes include a faulty air suspension control module, damaged wiring or connectors, a blown fuse, or software issues.

3. How can I diagnose the U0133 code in my Cadillac to determine if the issue lies with the air suspension control module?

- A diagnostic scan tool can be used to retrieve the specific trouble code and further troubleshoot the communication issue with the air suspension control module.

4. Can a U0133 code related to the air suspension control module be repaired at home, or is it recommended to seek professional assistance?

- Repairing the U0133 code may require specialized equipment and expertise, so it is generally recommended to consult a qualified mechanic or dealership for proper diagnosis and repair.

5. Are there any simple troubleshooting steps I can take before bringing my Cadillac in for service due to the U0133 code?

- You can check the air suspension control module's connections and fuses, ensuring they are secure and not damaged. Additionally, restarting the vehicle or clearing the code may temporarily resolve the issue.

6. Is it safe to continue driving my Cadillac with the U0133 code related to the air suspension control module?

- It is not recommended to drive the vehicle with unresolved communication issues with the air suspension control module, as it can affect the vehicle's handling and safety.

7. How much can I expect to pay for repairs related to the U0133 code involving the air suspension control module in a Cadillac?

- Repair costs can vary depending on the exact cause of the issue, but it is advisable to budget for diagnostic fees, potential part replacements, and labor costs when addressing this code.

8. Can a weak or failing battery in a Cadillac trigger the U0133 code indicating lost communication with the air suspension control module?

- Yes, a weak or failing battery can disrupt communication between modules in the vehicle, potentially leading to the U0133 code related to the air suspension control module.

9. Will resetting the OBDII codes by disconnecting the battery resolve the U0133 code issue with the air suspension control module in a Cadillac?

- While resetting the codes may temporarily clear the warning light, it is essential to address the underlying communication issue with the air suspension control module to prevent future occurrences of the U0133 code.

10. Is it possible for environmental factors, such as extreme temperatures or moisture, to trigger the U0133 code in a Cadillac's air suspension control module?

- Yes, extreme temperatures or moisture can sometimes affect the connections and components of the air suspension control module, leading to communication errors and the triggering of the U0133 code.