AutoCodes – Generic – U1088

U1088 Code - Invalid Or Missing Data For 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 indicates Invalid Or Missing Data For 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 7,585

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
Comments
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Code U1088 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 - Invalid Or Missing Data For Inflatable Restraint Sensing And Diagnostic Module - AutoCodes.com — U1088 Code - Invalid Or Missing Data For Inflatable Restraint Sensing And Diagnostic Module

What does this mean?

What are the Possible Causes of the DTC U1088?

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?

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 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 code?

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

Need Help with the Code?

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

Information for Specific Makes

U1088 Buick — Lost Communications With Inflatable Restraint Sensing And Diagnostic Module
U1088 Cadillac — Lost Communications With Inflatable Restraint Sensing And Diagnostic Module
U1088 Chevrolet — Lost Communications With Inflatable Restraint Sensing And Diagnostic Module
U1088 GMC — Lost Communications With Inflatable Restraint Sensing And Diagnostic Module
U1088 Pontiac — Invalid Or Missing Data For Inflatable Restraint Sensing And Diagnostic Module

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.