AutoCodes – Generic – U0134

U0134 Code - Lost Communication With Power Steering Control Module Rear

Quick Answer

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Common causes include Faulty Power Steering Control Module Rear, Power Steering Control Module Rear harness is open or shorted, Power Steering Control Module Rear 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 indicates Lost Communication With Power Steering Control Module Rear.
Common causes: Common causes include Faulty Power Steering Control Module Rear, Power Steering Control Module Rear harness is open or shorted, Power Steering Control Module Rear 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 3,775

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 Mar 31, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0134 Description

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Operating information and commands are exchanged among the devices. The devices have programmed information about what messages are needed to be exchanged on the serial data circuits. CAN bus uses two dedicated wires for communication. The wires are called CAN high and CAN low. When the CAN bus is in idle mode, both lines carry 2.5V. When data bits are being transmitted, the CAN high line goes to 3.75V, and the CAN low drops to 1.25V, thereby generating a 2.5V differential between the lines. Since communication relies on a voltage differential between the two bus lines, the CAN bus is NOT sensitive to inductive spikes, electrical fields, or other noise. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Power Steering Control Module Rear has not been received.

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

What does this mean?

What are the Possible Causes of the DTC U0134?

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

How to Fix the DTC U0134?

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 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.

Need more information about the U0134 code?

Need more information on how to fix the U0134 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0134 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U0134 Buick — Lost Communication With Rear Power Steering Control Module
U0134 Cadillac — Lost Communication With Rear Power Steering Control Module
U0134 Chevrolet — Lost Communication With Rear Power Steering Control Module
U0134 GMC — Lost Communication With Rear Power Steering Control Module

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 Code

1. What are the common symptoms of OBDII code U0134 (Lost Communication With Power Steering Control Module Rear)?

- Common symptoms include a loss of power steering assistance, illuminated power steering warning light on the dashboard, and potential difficulty steering the vehicle.

2. What are some possible causes of OBDII code U0134?

- Possible causes include a faulty power steering control module, damaged wiring or connectors connecting the power steering module, a blown fuse related to the power steering system, or a communication error within the vehicle's network.

3. How can I diagnose OBDII code U0134?

- Diagnosing this code typically involves using a diagnostic scanner to retrieve the specific trouble codes stored in the vehicle's computer. Additionally, a thorough inspection of the power steering control module, wiring, and connectors may be necessary.

4. Is it safe to drive with OBDII code U0134 active?

- It is not recommended to drive with this code active, as it can lead to a loss of power steering assistance, making steering more difficult and potentially unsafe.

5. How can I repair OBDII code U0134?

- Repairing this code may involve troubleshooting and repairing any damaged wiring or connectors, replacing a faulty power steering control module, or addressing any communication issues within the vehicle's network.

6. Can a DIY enthusiast fix OBDII code U0134 at home?

- While some basic troubleshooting steps can be performed at home, diagnosing and repairing this code may require specialized tools and expertise. It is recommended to consult a professional mechanic for proper diagnosis and repair.

7. Are there any preventative maintenance tips to avoid OBDII code U0134?

- Regularly inspecting the power steering system, checking for any signs of wear or damage, and addressing any issues promptly can help prevent the occurrence of this code.

8. How common is OBDII code U0134 in vehicles?

- The occurrence of this specific code can vary depending on the vehicle make and model. It is more common in vehicles equipped with electronic power steering systems.

9. Is OBDII code U0134 a serious issue that requires immediate attention?

- Yes, this code should be addressed promptly to ensure the safe operation of the power steering system and prevent potential steering difficulties while driving.

10. Can OBDII code U0134 be intermittent or permanent?

- This code can be either intermittent or permanent, depending on the underlying cause. Intermittent codes may come and go, while permanent codes persist until the issue is resolved.