Engine-Codes - Chevrolet - U1811 CHEVROLET

U1811 CHEVROLET - Battery Energy Control Module Powertrain Expansion CAN Bus Off

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

U1811 CHEVROLET 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 is the U1811 CHEVROLET code repair?

Start by checking 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.

What is the cost to diagnose the U1811 CHEVROLET code

Labor: 1.0

The cost to diagnose the U1811 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.
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Possible Symptoms

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

U1811 CHEVROLET Meaning

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.

More Information

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