AutoCodes – Generic – U0236

U0236 Code - Lost Communication With Column Lock Module

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 Column Lock Module, Column Lock Module harness is open or shorted, Column Lock 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: U0236 indicates Lost Communication With Column Lock Module.
Common causes: Common causes include Faulty Column Lock Module, Column Lock Module harness is open or shorted, Column Lock 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 7,523

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 04, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0236 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 Column Lock Module has not been received.

OBDII Code U0236 - Lost Communication With Column Lock Module - AutoCodes.com — U0236 Code - Lost Communication With Column Lock Module

What does this mean?

What are the Possible Causes of the DTC U0236?

Faulty Column Lock Module
Column Lock Module harness is open or shorted
Column Lock Module circuit poor electrical connection

How to Fix the DTC U0236?

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 U0236 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 U0236 code?

Need more information on how to fix the U0236 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0236 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U0236 Buick — Lost Communication With Steering Column Lock Module
U0236 Cadillac — Lost Communication With Steering Column Lock Module
U0236 Chevrolet — Lost Communication With Steering Column Lock Module
U0236 GMC — Lost Communication With Steering Column Lock 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 U0236 Code

1. What are the common symptoms of OBDII code U0236?

- Common symptoms include the inability to turn the ignition key, steering wheel locking up, and warning lights related to the steering system appearing on the dashboard.

2. What can cause the OBDII code U0236 to appear?

- The code can be triggered by a malfunction in the column lock module, faulty wiring connections, a blown fuse, or a software issue.

3. How can I diagnose the root cause of the U0236 code?

- Diagnosis typically involves checking the wiring connections to the column lock module, inspecting the fuse related to the module, and using a professional diagnostic scanner to identify the specific issue.

4. Is it safe to drive my vehicle with the U0236 code present?

- It is not recommended to drive the vehicle with the U0236 code present, as it can lead to sudden steering lock-ups and compromise driving safety.

5. Can I reset the U0236 code myself, or do I need a professional mechanic?

- While you can attempt to clear the code with an OBDII scanner, it is advisable to have a professional mechanic address the underlying issue to prevent further complications.

6. What are some potential repair options for the U0236 code?

- Repair options may include replacing the column lock module, repairing or replacing damaged wiring, checking and replacing the fuse, or updating the software related to the module.

7. How much does it typically cost to fix the U0236 code?

- The cost of repairs for the U0236 code can vary depending on the specific cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Can a DIY enthusiast with automotive knowledge fix the U0236 code themselves?

- While some experienced DIY enthusiasts may be able to address the U0236 code themselves, it is recommended to consult a professional mechanic due to the complexity of steering system components.

9. Does the U0236 code affect the vehicle's overall performance, aside from steering issues?

- The U0236 code primarily affects the steering system, but unresolved issues can potentially impact other vehicle functions, making it essential to address the problem promptly.

10. Are there any preventive maintenance tips to avoid encountering the U0236 code in the future?

- Regularly checking and maintaining the steering system components, ensuring proper wiring connections, and timely software updates can help prevent the recurrence of the U0236 code.