AutoCodes – Buick – U1193 Buick

U1193 Buick Code - Loss Of Vehicle Immobilizer Module Communications

Quick Answer

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Common causes include Faulty Vehicle Immobilizer Module, Vehicle Immobilizer Module harness is open or shorted, Vehicle Immobilizer 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: U1193 Buick indicates Loss Of Vehicle Immobilizer Module Communications.
Common causes: Common causes include Faulty Vehicle Immobilizer Module, Vehicle Immobilizer Module harness is open or shorted, Vehicle Immobilizer 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 480

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 26, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code U1193 Buick Description

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification number of the module which sent the message for the state of health monitoring/node alive messages. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. Once an identification number is learned by a module, it will monitor for that module node alive message. Each module on the class 2 serial data circuit is required to send a Node Alive message every 2 seconds. When no message is detected from a learned identification number for 5 seconds, a Diagnostic Trouble Code (DTC) U1193 is set.

OBDII Code U1193 Buick - Loss Of Vehicle Immobilizer Module Communications - AutoCodes.com — U1193 Buick Code - Loss Of Vehicle Immobilizer Module Communications

What does this mean?

What are the Possible Causes of the DTC U1193 Buick?

Faulty Vehicle Immobilizer Module
Vehicle Immobilizer Module harness is open or shorted
Vehicle Immobilizer Module circuit poor electrical connection

How to Fix the DTC U1193 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 U1193 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.

Need more information about the U1193 Buick code?

Need more information on how to fix the U1193 Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1193 Buick code diagnosed by a professional: Find a repair shop in your area

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 U1193 Buick Code

What does the OBDII code U1193 mean on a Buick?

1. The U1193 code indicates a loss of communication between the Vehicle Immobilizer Module and other control modules in the vehicle. 2.

What are the common symptoms of the U1193 code in a Buick?

Symptoms may include the vehicle failing to start, an illuminated security light, or intermittent starting issues. 3.

What causes the U1193 code to appear in a Buick?

Common causes include a faulty Vehicle Immobilizer Module, damaged wiring or connectors, or issues with the CAN bus communication network. 4.

Can I drive my Buick with the U1193 code?

Itâ€™s not recommended, as the vehicle may fail to start or experience security system malfunctions, leaving you stranded. 5.

How do I diagnose the U1193 code on a Buick?

Diagnosis involves using an advanced scan tool to check for communication issues, inspecting wiring and connectors, and testing the Vehicle Immobilizer Module. 6.

How can a faulty Vehicle Immobilizer Module cause the U1193 code?

If the module fails, it cannot communicate with other control modules, triggering the U1193 code. 7.

Can a weak battery cause the U1193 code in a Buick?

Yes, a weak or failing battery can lead to intermittent communication faults, including the U1193 code. 8.

What repairs are needed to fix the U1193 code on a Buick?

Repairs may include replacing the Vehicle Immobilizer Module, repairing damaged wiring, or reprogramming the module to restore communication. 9.

Is reprogramming necessary after fixing the U1193 code?

In many cases, reprogramming or reinitializing the Vehicle Immobilizer Module and related systems may be required. 10.

Can a professional mechanic resolve the U1193 code quickly?

Yes, an experienced mechanic with the right tools can diagnose and repair the issue efficiently, depending on the exact cause.

Discuss the causes and fixes for U1193 Buick OBDII Code

Submit a New Comment

Code U1193 Buick comments

No comments found for this page.

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.