AutoCodes - Generic - U1891

U1891 Code - Hybrid Control Module Lost Communication With Instrument Panel Cluster

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

|U1891 code possible causes

  • Faulty Instrument Panel Cluster (IPC)
  • Instrument Panel Cluster harness is open or shorted
  • Instrument Panel Cluster circuit poor electrical connection
  • Faulty Hybrid Control Module (HCM)

|How do I fix the U1891 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 U1891 code

Labor: 1.0

The cost of diagnosing the U1891 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 U1891 code possible symptoms?

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

|U1891 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 U1891 - Hybrid Control Module Lost Communication With Instrument Panel Cluster - AutoCodes.com

|Need more information with the U1891 code?

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|U1891 code information for specific makes

  • U1891 BUICK Hybrid Control Module Lost Communication With Instrument Panel Cluster
  • U1891 CADILLAC Hybrid Control Module Lost Communication With Instrument Panel Cluster
  • U1891 CHEVROLET Hybrid Control Module Lost Communication With Instrument Panel Cluster
  • U1891 GMC Hybrid Control Module Lost Communication With Instrument Panel Cluster

|Need help with a U1891 code?

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|U1891 code comments

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Repair Importance Level: 3
 
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