AutoCodes – Generic – U2138

U2138 Code - Lost Communication With Steering Column Lock Control Module

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Steering Column Lock Control Module (SCLCM), Steering Column Lock Control Module harness is open or shorted, Steering Column Lock 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: U2138 indicates Lost Communication With Steering Column Lock Control Module.
Common causes: Common causes include Faulty Steering Column Lock Control Module (SCLCM), Steering Column Lock Control Module harness is open or shorted, Steering Column Lock 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 850

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 Jun 16, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U2138 Description

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices. The devices 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 device as an availability indication of the transmitter device. Each message contains the identification number of the transmitter device. A loss of serial data communications Diagnostic Trouble Code (DTC) does not represent a failure of the devices that contain the stored code. The DTC will set when a supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U2138 - Lost Communication With Steering Column Lock Control Module - AutoCodes.com — U2138 Code - Lost Communication With Steering Column Lock Control Module

What does this mean?

What are the Possible Causes of the DTC U2138?

Faulty Steering Column Lock Control Module (SCLCM)
Steering Column Lock Control Module harness is open or shorted
Steering Column Lock Control Module circuit poor electrical connection

How to Fix the DTC U2138?

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 U2138 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 U2138 code?

Need more information on how to fix the U2138 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U2138 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U2138 Buick — Lost Communication With Steering Column Lock Control Module
U2138 Cadillac — Lost Communication With Steering Column Lock Control Module
U2138 Chevrolet — Lost Communication With Steering Column Lock Control Module
U2138 GMC — Lost Communication With Steering Column Lock 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 U2138 Code

1. What are the common symptoms of OBDII code U2138 - Lost Communication With Steering Column Lock Control Module?

- Common symptoms include difficulty starting the vehicle, steering wheel lock malfunctions, and warning lights on the dashboard.

2. What can cause the OBDII code U2138 to trigger?

- The code U2138 can be triggered by a faulty steering column lock control module, damaged wiring, loose connections, or a communication breakdown between modules.

3. How can I diagnose the cause of OBDII code U2138?

- Diagnosing the cause of U2138 involves checking the connections and wiring related to the steering column lock control module, using an OBDII scanner to retrieve specific error codes, and performing a thorough visual inspection.

4. Can I still drive my vehicle with OBDII code U2138 present?

- It is not recommended to drive your vehicle with the U2138 code present, as it can lead to potential safety hazards due to steering column malfunctions.

5. How can I repair OBDII code U2138?

- Repairing U2138 may involve replacing the steering column lock control module, repairing damaged wiring or connections, and ensuring proper communication between modules.

6. Is it possible to reset OBDII code U2138 without repairs?

- Resetting the code without addressing the underlying issue is not recommended, as the problem will likely persist and can affect the safety and performance of the vehicle.

7. Are there any DIY tips for troubleshooting OBDII code U2138?

- DIY tips include checking the fuses related to the steering column lock control module, inspecting the wiring for any visible damage, and ensuring all connections are secure.

8. How much does it typically cost to repair OBDII code U2138?

- The cost of repairing U2138 can vary depending on the specific issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Can a mechanic help me fix OBDII code U2138, or do I need to visit a dealership?

- A qualified mechanic can help diagnose and repair U2138, but if specialized software or parts are required, a dealership may be the best option for resolving the issue.

10. Is OBDII code U2138 a common issue in certain vehicle models?

- U2138 can be a common issue in vehicles equipped with steering column lock control modules, particularly in models with electronic steering systems.