AutoCodes - Chevrolet - U18A4 CHEVROLET

U18A4 CHEVROLET Code - Lost Communication With Hybrid/EV Battery DC Charging Communications Gateway Module On High Voltage Energy Management CAN Bus

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

|U18A4 CHEVROLET code possible causes

  • Faulty Hybrid/EV Battery DC Charging Communications Gateway Module
  • Hybrid/EV Battery DC Charging Communications Gateway Module harness is open or shorted
  • Hybrid/EV Battery DC Charging Communications Gateway Module circuit poor electrical connection

|How do I fix the U18A4 CHEVROLET 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 U18A4 CHEVROLET code

Labor: 1.0

The cost of diagnosing the U18A4 CHEVROLET 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 U18A4 CHEVROLET code possible symptoms?

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

|U18A4 CHEVROLET code description

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices. The devices have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver device as an availability indication of the transmitter device. Each message contains the identification number of the transmitter device. The Diagnostic Trouble Code (DTC) will set a supervised periodic message that includes the transmitter device availability that has not been received.
OBDII Code U18a4 Chevrolet - Lost Communication With Hybrid/EV Battery DC Charging Communications Gateway Module On High Voltage Energy Management CAN Bus - AutoCodes.com

|Need more information with the U18A4 CHEVROLET code?

Need more information on how to fix the U18A4 CHEVROLET code?
Get Access to Factory Service Manuals

|Need help with a U18A4 CHEVROLET code?

Get the U18a4 Chevrolet code diagnosed by a professional: Find a repair shop in your area

|U18A4 CHEVROLET code comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the U18a4 Chevrolet code? Have you replaced any parts?
Any information is appreciated. Thanks
Top ⇧
Repair Importance Level: 3
 
1=Low 2=Medium 3=High What is this?
Repair Difficulty Level: 3
 
1=Easy 2=Moderate 3=Hard What is this?