AutoCodes – Buick – U0134 Buick

U0134 Buick Code - Lost Communication With Rear Power Steering 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 Rear Power Steering Control Module, Rear Power Steering Control Module harness is open or shorted, Rear Power Steering 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: U0134 Buick indicates Lost Communication With Rear Power Steering Control Module.
Common causes: Common causes include Faulty Rear Power Steering Control Module, Rear Power Steering Control Module harness is open or shorted, Rear Power Steering 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 528

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 U0134 Buick 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 Rear Power Steering Control Module has not been received.

OBDII Code U0134 Buick - Lost Communication With Rear Power Steering Control Module - AutoCodes.com — U0134 Buick Code - Lost Communication With Rear Power Steering Control Module

What does this mean?

What are the Possible Causes of the DTC U0134 Buick?

Faulty Rear Power Steering Control Module
Rear Power Steering Control Module harness is open or shorted
Rear Power Steering Control Module circuit poor electrical connection

How to Fix the DTC U0134 Buick?

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 U0134 Buick 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 U0134 Buick Code

1. What are the common symptoms of OBDII code U0134 in a Buick related to the "Lost Communication With Rear Power Steering Control Module"?

- Common symptoms include loss of power steering functionality in the rear of the vehicle, warning lights on the dashboard, and potential issues with steering responsiveness.

2. What are some possible causes of the U0134 code in a Buick?

- The U0134 code can be triggered by a faulty rear power steering control module, damaged wiring or connectors, low battery voltage, or a communication bus malfunction.

3. How can I diagnose the U0134 code in my Buick?

- Diagnosing the U0134 code involves using an OBDII scanner to retrieve the specific fault codes, checking the rear power steering control module for any visible damage, and inspecting the wiring and connectors for signs of wear or corrosion.

4. Is it safe to continue driving my Buick with the U0134 code present?

- It is not recommended to drive your Buick with the U0134 code active, as it can lead to a loss of power steering assistance, potentially compromising vehicle control and safety.

5. How can I repair the U0134 code in my Buick?

- Repairing the U0134 code typically involves addressing the root cause of the communication loss, such as replacing the rear power steering control module, repairing damaged wiring or connectors, or resetting the control module.

6. Can a DIY enthusiast fix the U0134 code issue in a Buick?

- While some aspects of diagnosing and repairing the U0134 code may be within reach of a skilled DIY enthusiast, it is recommended to consult with a professional mechanic or dealership for proper diagnosis and repair.

7. Will resetting the trouble codes make the U0134 code disappear permanently?

- Simply resetting the trouble codes may clear the warning lights temporarily, but if the underlying issue causing the U0134 code is not fixed, the code is likely to reappear.

8. Is the U0134 code specific to Buick vehicles, or can it occur in other car makes and models?

- The U0134 code related to lost communication with the rear power steering control module can occur in various vehicle makes and models that are equipped with similar systems.

9. Are there any preventive measures to avoid the U0134 code from reoccurring in my Buick?

- Regular maintenance, checking the electrical connections, and ensuring the power steering system is in good working condition can help prevent the reoccurrence of the U0134 code in your Buick.

10. How much can I expect to pay for repairing the U0134 code in my Buick?

- The cost of repairing the U0134 code can vary depending on the specific cause of the issue, but it may involve expenses for parts, labor, and diagnostic services, which can range from a few hundred to a few thousand dollars.