AutoCodes - Cadillac - U1811 CADILLAC

U1811 CADILLAC Code - Battery Energy Control Module Powertrain Expansion CAN Bus Off

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

|U1811 CADILLAC code possible causes

  • Faulty Battery Energy Control Module
  • Battery Energy Control Module harness is open or shorted
  • Battery Energy Control Module circuit poor electrical connection

|How do I fix the U1811 CADILLAC 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 U1811 CADILLAC code

Labor: 1.0

The cost of diagnosing the U1811 CADILLAC 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 U1811 CADILLAC code possible symptoms?

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

|U1811 CADILLAC code description

The high voltage energy management high-speed General Motor Local Area Network (GMLAN) serial data circuits are serial data buses used to communicate information between the Hybrid Powertrain Control Module 2, the Battery Energy Control Module, and the Battery Charger. If this serial data system is inoperative the devices will not communicate with each other on this bus, but they still communicate with the scan tool through high-speed GMLAN bus.
The scan tool does not communicate with devices through the high voltage energy management high-speed GMLAN bus. The high voltage energy high-speed GMLAN serial data circuits connect directly to the auxiliary data connector and do not connect with the scan tool.
The Diagnostic Trouble Code (DTC) will set when the device setting the DTC has attempted to establish communications on the serial data circuits for more than 1.4 seconds without success.
OBDII Code U1811 Cadillac - Battery Energy Control Module Powertrain Expansion CAN Bus Off - AutoCodes.com

|Need more information with the U1811 CADILLAC code?

Need more information on how to fix the U1811 CADILLAC code?
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|Need help with a U1811 CADILLAC code?

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|U1811 CADILLAC code comments

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