AutoCodes - Generic - U189A

U189A Code - DC To DC Converter Control Module 'A' Lost Communication With Hybrid Powertrain Control Module

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3
Table of contents

|U189A code possible causes

  • Faulty Hybrid Powertrain Control Module
  • Hybrid Powertrain Control Module harness is open or shorted
  • Hybrid Powertrain Control Module circuit poor electrical connection
  • Faulty DC To DC Converter Control Module 'A'

|How do I fix the U189A code?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|Cost of diagnosing the U189A code

Labor: 1.0

The cost of diagnosing the U189A code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are U189A code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|U189A code description

Modules connected to the class 2 and high-speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The Diagnostic Trouble Code (DTC) is reported on a class 2 link to the scan tool by Powertrain Control Module (PCM) even if they may be set by different modules. The DTC will set when a node alive message has not been received from an identified module within the last 5 seconds after establishing class 2 serial data communication, or a supervised high-speed GMLAN message has not been received.
OBDII Code U189a - DC To DC Converter Control Module 'A' Lost Communication With Hybrid Powertrain Control Module - AutoCodes.com

|Need more information with the U189A code?

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|U189A code information for specific makes

  • U189A BUICK DC To DC Converter Control Module 'A' Lost Communication With Hybrid Powertrain Control Module
  • U189A CADILLAC DC To DC Converter Control Module 'A' Lost Communication With Hybrid Powertrain Control Module
  • U189A CHEVROLET DC To DC Converter Control Module 'A' Lost Communication With Hybrid Powertrain Control Module
  • U189A GMC DC To DC Converter Control Module 'A' Lost Communication With Hybrid Powertrain Control Module

|Need help with a U189A code?

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|U189A code comments

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Repair Importance Level: 3
 
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