LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Buick >> 2016 >> Regal GS, AWD >> Repair and Diagnosis >> Quick Lookups >> DTC Index >> Data Communication System - Diagnostic Trouble Codes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Data Communication System - Diagnostic Trouble Codes

DATA COMMUNICATION SYSTEM - DIAGNOSTIC TROUBLE CODES

DTC Description
DTC B1000 Electronic Control Unit
DTC B1001 Option Configuration
DTC B101D Electronic Control Unit Hardware
DTC B101E Electronic Control Unit Software
DTC C056D Electronic Control Unit Hardware
DTC C056E Electronic Control Unit Software
DTC P0601-P0607, P060A-P060C, P062F, P16E9-P16F0, or P262B Control Module
DTC U0001 Control Module
DTC U0020 Low Speed CAN Bus
DTC U0028 MOST Bus
DTC U0029 MOST Bus Performance
DTC U0073 or U2100 Control Module Communication/CAN Bus Communication
DTC U0074 Control Module Communication Bus B Off (Chassis Expansion Bus)
DTC U0074 Control Module Communication (Powertrain Expansion Bus with HP6)
DTC U0074 Control Module Communication Powertrain Expansion CAN Bus Off Malfunction (Powertrain Expansion Bus without HP6)
DTC U0077 Control Module Communication Chassis Expansion CAN Bus Off
DTC U0078 Control Module Communication Low Speed CAN Bus Off
DTC U0100-U02FF Control Module U Code List (without HP6)
DTC U0100-U02FF Control Module U Code List (with HP6)
DTC U0300-U0336 Control Module U Code List
DTC U0400-U05FF Control Module U Code List
DTC U1500-U15FF Control Module U Code List
DTC U180B Battery Energy Control Module High Speed CAN Bus Off Malfunction
DTC U1811 Battery Energy Control Module Powertrain Expansion CAN Bus Off Malfunction
DTC U1814 Powertrain Wake-Up Communication Circuit
DTC U1817 Lost Communication with Hybrid Powertrain Control Module on Powertrain Expansion CAN Bus Malfunction
DTC U1818 Lost Communication with Engine Control Module on Powertrain Expansion CAN Bus Malfunction
DTC U182A Hybrid Powertrain Control Module Lost Communication with Battery Energy Control Module on Powertrain Expansion CAN Bus Malfunction
DTC U1831 Drive Motor Control Module 1 Lost Communication with Hybrid Powertrain Control Module Malfunction
DTC U1844 Battery Energy Control Module Lost Communication with Hybrid Powertrain Control Module on Powertrain Expansion CAN Bus Malfunction
DTC U1845 or U1846 Drive Motor Control Module 1 Lost Communication with Hybrid Powertrain Control Module Malfunction
DTC U1847 Drive Motor Control Module 1 Lost Communication with Battery Energy Control Module on Powertrain Expansion CAN Bus Malfunction
DTC U1875 Drive Motor Control Module 1 Lost Communication with Battery Energy Control Module Malfunction
DTC U1876 Drive Motor Control Module 1 Lost Communication with Engine Control Module Malfunction
DTC U1885 Battery Energy Control Module Lost Communication with Hybrid Powertrain Control Module Malfunction
DTC U1886 Battery Energy Control Module Lost Communication with Engine Control Module Malfunction
DTC U18A2 Lost Communication with Fuel Pump Driver Control Module
DTC U18A6 Lost Communication with Right Object Detection Control Module on Dedicated Bus 1
DTC U18B9-U18BF High Speed CAN Bus Subnet Configuration List
DTC U2098 MOST Communication Enable
DTC U2099 High Speed Communication Enable Circuit
DTC U2101 CAN Bus Maximum List of Control Modules
DTC U2160-U2231 Control Module U Code List
DTC U2616 Fuel Pump Driver Control Module Lost Communication with ECM