LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Buick >> 2016 >> Regal GS, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Data Communication System - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC U1844: Battery Energy Control Module Lost Communication with Hybrid Powertrain Control Module on Powertrain Expansion CAN Bus Malfunction >> Diagnostic Fault Information
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
B+ U1844* U1844 - -
Ignition U1814, U1844* U1844* - -
Powertrain High Speed GMLAN Serial Data (+) U0074* U0074, U1844* U0074* -
Powertrain High Speed GMLAN Serial Data (-) U0074* U0074, U1844* U0074* -
Ground - U1844* - -
* Other modules/DTCs may set with this fault and multiple symptoms including a no start condition may occur.
scientia non olet · About LEMON Manuals