AutoCodes – Generic – U128D

U128D Code - Power Seat Control Unit Lost Communication With Gauge Control Module

Quick Answer

The Diagnostic Trouble Code (DTC) sets when a communication malfunction was detected between the Gauge Control Module and the Power Seat Control Unit. Common causes include Faulty Gauge Control Module, Gauge Control Module harness is open or shorted, Gauge 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: U128D indicates Power Seat Control Unit Lost Communication With Gauge Control Module.
Common causes: Common causes include Faulty Gauge Control Module, Gauge Control Module harness is open or shorted, Gauge 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 2,704

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 May 10, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U128D Description

The Diagnostic Trouble Code (DTC) sets when a communication malfunction was detected between the Gauge Control Module and the Power Seat Control Unit.

OBDII Code U128D - Power Seat Control Unit Lost Communication With Gauge Control Module - AutoCodes.com — U128D Code - Power Seat Control Unit Lost Communication With Gauge Control Module

What does this mean?

What are the Possible Causes of the DTC U128D?

Faulty Gauge Control Module
Gauge Control Module harness is open or shorted
Gauge Control Module circuit poor electrical connection
Faulty Power Seat Control Unit

How to Fix the DTC U128D?

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 U128D 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 U128D code?

Need more information on how to fix the U128D code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U128D code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U128D Acura — Power Seat Control Unit Lost Communication With Gauge Control Module
U128D Honda — Power Seat Control Unit Lost Communication With Gauge 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 U128D Code

What does the OBDII code U128D mean?

The OBDII code U128D indicates that there is a communication issue between the power seat control unit and the gauge control module, meaning they are unable to exchange data effectively.

What are the common symptoms of the U128D code?

Common symptoms may include malfunctioning power seat adjustments, warning lights on the dashboard, or issues with the vehicle's gauge readings.

What could cause the U128D code to appear?

Causes may include damaged wiring or connectors between the power seat control unit and gauge control module, a faulty control module, or software issues in the vehicleâ€™s computer system.

How can I diagnose the U128D code?

To diagnose the U128D code, use an OBDII scanner to confirm the code, check for other related codes, inspect wiring and connectors, and test the functionality of the power seat control unit and gauge control module.

What repairs are typically needed for the U128D code?

Repairs may involve repairing or replacing damaged wiring or connectors, replacing a faulty power seat control unit or gauge control module, or updating the vehicle's software.

Can I drive my vehicle with the U128D code?

While it may be safe to drive, you might experience issues with your power seats and gauge functionality. It's advisable to have the problem diagnosed and repaired as soon as possible.

Is the U128D code serious?

The seriousness can vary; while it may not prevent the vehicle from functioning, it can lead to further electrical issues or safety concerns if not addressed.

Will clearing the U128D code fix the problem?

Clearing the code may temporarily turn off the warning light, but if the underlying issue is not resolved, the code is likely to return.

How much does it typically cost to fix the U128D code?

Repair costs can vary widely based on the specific issue, ranging from simple wiring repairs costing under $100 to module replacements that could exceed $500.

Can I fix the U128D code myself?

If you have experience with automotive electrical systems, you may be able to inspect and repair wiring or connectors. However, for module replacements or complex diagnostics, professional help is recommended.