AutoCodes - Generic - U1816

U1816 Code - Lost Communication With Drive Motor Control Module B On Bus B

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

|U1816 code possible causes

  • Faulty Drive Motor Control Module B
  • Drive Motor Control Module B harness is open or shorted
  • Drive Motor Control Module B circuit poor electrical connection

|How do I fix the U1816 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 U1816 code

Labor: 1.0

The cost of diagnosing the U1816 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 U1816 code possible symptoms?

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

|U1816 code description

Devices connected to the powertrain 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 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 when a supervised periodic message that includes the transmitter device availability has not been received.
OBDII Code U1816 - Lost Communication With Drive Motor Control Module B On Bus B - AutoCodes.com

|Need more information with the U1816 code?

Need more information on how to fix the U1816 code? Get Access to Factory Service Manuals

|U1816 code information for specific makes

  • U1816 BUICK Lost Communication With Drive Motor Control Module B On Bus B
  • U1816 CADILLAC Lost Communication With Drive Motor Control Module B On Bus B
  • U1816 CHEVROLET Lost Communication With Drive Motor Control Module B On Bus B
  • U1816 GMC Lost Communication With Drive Motor Control Module B On Bus B

|Need help with a U1816 code?

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|U1816 code comments

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