AutoCodes – GMC – U1088 GMC

U1088 GMC Code - Lost Communications With Inflatable Restraint Sensing And Diagnostic Module

Quick Answer

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Common causes include Faulty Inflatable Restraint Sensing And Diagnostic Module, Inflatable Restraint Sensing And Diagnostic Module harness is open or shorted, Inflatable Restraint Sensing And Diagnostic 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: U1088 GMC indicates Lost Communications With Inflatable Restraint Sensing And Diagnostic Module.
Common causes: Common causes include Faulty Inflatable Restraint Sensing And Diagnostic Module, Inflatable Restraint Sensing And Diagnostic Module harness is open or shorted, Inflatable Restraint Sensing And Diagnostic 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 1,251

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 22, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1088 GMC 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) U1088 is set.

OBDII Code U1088 GMC - Lost Communications With Inflatable Restraint Sensing And Diagnostic Module - AutoCodes.com — U1088 GMC Code - Lost Communications With Inflatable Restraint Sensing And Diagnostic Module

What does this mean?

What are the Possible Causes of the DTC U1088 GMC?

Faulty Inflatable Restraint Sensing And Diagnostic Module
Inflatable Restraint Sensing And Diagnostic Module harness is open or shorted
Inflatable Restraint Sensing And Diagnostic Module circuit poor electrical connection

How to Fix the DTC U1088 GMC?

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 U1088 GMC 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 U1088 GMC code?

Need more information on how to fix the U1088 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1088 GMC code diagnosed by a professional: Find a repair shop in your area

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

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 U1088 GMC Code

1. What are the common symptoms of OBDII code U1088 GMC?

- The common symptoms of code U1088 GMC include the airbag warning light illuminating on the dashboard and potential issues with the vehicle's airbag system.

2. What does the OBDII code U1088 GMC mean?

- OBDII code U1088 GMC indicates a communication problem with the Inflatable Restraint Sensing and Diagnostic Module, which is responsible for the operation of the airbag system.

3. What are the possible causes of code U1088 GMC?

- The possible causes of code U1088 GMC include a faulty Inflatable Restraint Sensing and Diagnostic Module, damaged wiring or connectors, or a communication breakdown within the airbag system.

4. How can I diagnose the cause of OBDII code U1088 GMC?

- Diagnosing the cause of code U1088 GMC typically involves using a diagnostic scanner to retrieve the code, checking the wiring and connectors related to the airbag system, and testing the Inflatable Restraint Sensing and Diagnostic Module for faults.

5. Can I still drive my vehicle with OBDII code U1088 GMC?

- It is not recommended to drive the vehicle with code U1088 GMC present, as it indicates a potential issue with the airbag system, which is a crucial safety component in the event of a collision.

6. How can I repair OBDII code U1088 GMC?

- Repairing code U1088 GMC may involve replacing the faulty Inflatable Restraint Sensing and Diagnostic Module, repairing or replacing damaged wiring or connectors, and clearing the code with a diagnostic scanner.

7. Is it safe to reset the OBDII code U1088 GMC without fixing the underlying issue?

- It is not safe to reset code U1088 GMC without addressing the underlying problem, as it could compromise the functionality of the airbag system and potentially put occupants at risk in the event of an accident.

8. Are there any DIY tips for troubleshooting OBDII code U1088 GMC?

- DIY tips for troubleshooting code U1088 GMC include checking the airbag system's wiring and connectors for damage, ensuring the Inflatable Restraint Sensing and Diagnostic Module is securely connected, and consulting the vehicle's service manual for specific diagnostic procedures.

9. How much does it cost to fix OBDII code U1088 GMC at a repair shop?

- The cost of fixing code U1088 GMC at a repair shop can vary depending on the specific cause of the issue, but it may involve diagnostic fees, parts replacement costs, and labor charges, which can range from a few hundred to over a thousand dollars.

10. Can a mechanic help me with diagnosing and repairing OBDII code U1088 GMC?

- Yes, a qualified mechanic or dealership service center can assist with diagnosing and repairing code U1088 GMC by conducting a thorough inspection of the airbag system, identifying the root cause of the issue, and performing the necessary repairs to ensure the system functions correctly.