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Control Module U Code List

This list includes all Data Communications related U-code DTCs in alphanumeric order with descriptors for all modules. Not all DTCs listed will be applicable to all vehicles.

DTC

DTC Descriptor

U0001 00

High Speed CAN Bus Malfunction

U0001 04

High Speed CAN Bus Malfunction Open

U0002 00

High Speed CAN Bus

U0020 00

Low Speed CAN Bus

U0073 00

Control Module Communication Bus A Off

U0073 01

Control Module Communication Bus A Off Short to Battery

U0073 02

Control Module Communication Bus A Off Short to Ground

U0073 04

Control Module Communication Bus A Off Open

U0073 71

Control Module Communication Bus A Off Invalid Data

U0074 00

Control Module Communication Bus B Off

U0077 00

Control Module Chassis Expansion Communication Bus Off

U0078 00

Control Module Low Speed Communication Bus Off

U007A 00

Control Module High Voltage Energy Management Communication Bus Off

U0100 00

Lost Communication With Engine Control Module

U0100 71

Lost Communication With Engine Control Module Invalid Data

U0100 72

Lost Communication With Engine Control Module Message Counter Incorrect

U0100 74

Lost Communication With Engine Control Module Bus Signal Checksum Error

U0101 00

Lost Communication With Transmission Control Module

U0101 71

Lost Communication With Transmission Control Module Invalid Data

U0102 00

Lost Communication with Transfer Case Control Module

U0102 71

Lost Communication with Transfer Case Control Module Invalid Data

U0104 00

Lost Communication With Cruise Control Module

U0104 02

Lost Communication With Cruise Control Module Short to Ground

U0104 71

Lost Communication With Cruise Control Module Invalid Data

U0104 72

Lost Communication With Cruise Control Module Message Counter Incorrect

U0104 74

Lost Communication With Cruise Control Module Bus Signal Checksum Error

U0105 00

Lost Communication with Fuel Injector Control Module

U0109 00

Lost Communication with Fuel Pump Control Module

U010F 00

Lost Communication with Air-Conditioning Control Module

U0111 00

Lost Communication with Battery Energy Control Module

U0112 00

Lost Communication with Battery Energy Control Module

U0115 00

Lost Communication with ECM 2

U0117 00

Lost Communication With Power Take-Off Control Module

U0121 00

Lost Communication With Electronic Brake Control Module

U0121 03

Lost Communication With Electronic Brake Control Module Low Voltage

U0121 71

Lost Communication With Electronic Brake Control Module Invalid Data

U0121 72

Lost Communication With Electronic Brake Control Module Message Counter Incorrect

U0121 74

Lost Communication With Electronic Brake Control Module Bus Signal Checksum Error

U0122 00

Lost Communication With Vehicle Stability Control Module

U0125 00

Lost Communication With Multi-axis Acceleration Sensor Module

U0125 71

Lost Communication With Multi-axis Acceleration Sensor Module Invalid Data

U0125 72

Lost Communication With Multi-axis Acceleration Sensor Module Message Counter Incorrect

U0125 74

Lost Communication With Multi-axis Acceleration Sensor Module Bus Signal Checksum Error

U0126 00

Lost Communication With Steering Wheel Angle Sensor Module

U0126 71

Lost Communication With Steering Wheel Angle Sensor Module Invalid Data

U0126 72

Lost Communication With Steering Wheel Angle Sensor Module Message Counter Incorrect

U0126 74

Lost Communication With Steering Wheel Angle Sensor Module Bus Signal Checksum Error

U0126 5A

Lost Communication With Steering Wheel Angle Sensor Module Not Plausible

U0128 00

Lost Communication With Park Brake Control Module

U0128 71

Lost Communication With Park Brake Control Module Invalid Data

U0128 72

Lost Communication With Park Brake Control Module Message Counter Incorrect

U0128 74

Lost Communication With Park Brake Control Module Bus Signal Checksum Error

U0129 00

Lost Communication with Brake System Control Module

U0130 00

Lost Communication With Electric Power Steering Control Module

U0130 71

Lost Communication With Electric Power Steering Control Module Invalid Data

U0130 72

Lost Communication With Electric Power Steering Control Module Message Counter Incorrect

U0130 74

Lost Communication With Electric Power Steering Control Module Bus Signal Checksum Error

U0131 00

Lost Communication With Power Steering Control Module

U0131 71

Lost Communication With Power Steering Control Module Invalid Data

U0132 00

Lost Communication With Suspension Control Module

U0133 00

Lost Communication With Air Suspension Control Module

U0133 71

Lost Communication With Air Suspension Control Module Invalid Data

U0136 00

Lost Communication With Differential Control Module - Rear

U0136 71

Lost Communication With Differential Control Module - Rear Invalid Data

U0139 00

Lost Communication With Suspension Control Module

U0139 71

Lost Communication With Suspension Control Module Invalid Data

U0140 00

Lost Communication With Body Control Module

U0140 08

Lost Communication With Body Control Module Performance - Signal Invalid

U0140 71

Lost Communication With Body Control Module Invalid Data

U0140 72

Lost Communication With Body Control Module Message Counter Incorrect

U0140 74

Lost Communication With Body Control Module Bus Signal Checksum Error

U0146 00

Lost Communication with Gateway

U0151 00

Lost Communication With Inflatable Restraint Sensing and Diagnostic Module

U0155 00

Lost Communication With Instrument Cluster

U0158 00

Lost Communication With Head-Up Display

U0159 00

Lost Communication With Parking Assist Control Module

U0160 00

Lost Communication With Chime Alarm Control Module

U0164 00

Lost Communication with HVAC Control Module

U0166 00

Lost Communication with Auxiliary Heater Control Module

U0167 00

Lost Communication with Immobiliser Control Module

U0168 00

Lost Communication With Keyless Entry Control Module

U016B 00

Lost Communication with Electric A/C Compressor Control Module

U0170 00

Lost Communication With Passenger Presence Detection Sensor Module

U0181 00

Lost Communication With Headlamp Levelling Control Module

U0182 00

Lost Communication With Lighting Control Module - Front

U0184 00

Lost Communication With Radio

U0186 00

Lost Communication With Speaker Amplifier Module

U0196 00

Lost Communication With Rear Audio Control Module

U0191 00

Lost Communication With Television

U0193 00

Lost Communication With Digital Radio Receiver Control Module

U0197 00

Lost Communication With Telephone Control Module

U0198 00

Lost Communication With Telematic Control Module

U0201 00

Lost Communication With Transfer Case Control Module

U0203 00

Lost Communication With Left Rear Door Switch Panel Control Module

U0204 00

Lost Communication With Right Rear Door Switch Panel Control Module

U0207 00

Lost Communication With Movable Roof Control Module

U0208 00

Lost Communication With Memory Seat Control Module

U0209 00

Lost Communication With Front Seat Heating Control Module

U0210 00

Lost Communication With Rear Seat Heating Control Module

U0230 00

Lost Communication With Liftgate Control Module

U0232 00

Lost Communication With Side-Object Detection Control Module - Left

U0233 00

Lost Communication With Side-Object Detection Control Module - Right

U0236 00

Lost Communication With Steering Column Lock Module

U0237 00

Lost Communication With Multimedia Player Interface Module

U023A 00

Lost Communication With Vehicle Direction Camera Control Module

U0249 00

Lost Communication With Rear Radio Audio Control Module

U0252 00

Lost Communication With Trailer Interface Control Module

U0254 00

Lost Communication With Remote Start Module

U0255 00

Lost Communication With Info Display Module

U0256 00

Lost Communication With Infotainment Faceplate Control Module

U0257 00

Lost Communication With Info Display Module/Infotainment Faceplate Control Module

U0264 00

Lost Communication With Camera Module - Rear

U0284 00

Lost Communication with Active Grille Air Shutter 1 Motor Module

U0285 00

Lost Communication with Active Grille Air Shutter 2 Motor Module

U0293 00

Lost Communication with Hybrid Powertrain Control Module

U0301 00

Software Incompatibility with Engine Control Module

U0302 00

Software Incompatibility with Transmission Control Module

U0315 00

Software Incompatibility with Electronic Brake Control Module

U0401 00

Invalid Data Received from ECM

U0401 72

Invalid Data Received from ECM Message Counter Incorrect

U0401 74

Invalid Data Received from ECM Bus Signal Checksum Error

U0402 72

Invalid Data Received From Transmission Control Module Message Counter Incorrect

U0402 73

Invalid Data Received From Transmission Control Module Parity Error

U0402 74

Invalid Data Received From Transmission Control Module Bus Signal Checksum Error

U0405 00

Invalid Data Received From Cruise Control Module

U0405 71

Invalid Data Received From Cruise Control Module Invalid Data

U0405 72

Invalid Data Received From Cruise Control Module Message Counter Incorrect

U0405 74

Invalid Data Received From Cruise Control Module Bus Signal Checksum Error

U0415 00

Invalid Data Received From Electronic Brake Control Module

U0415 72

Invalid Data Received From Electronic Brake Control Module Message Counter Incorrect

U0415 74

Invalid Data Received From Electronic Brake Control Module Bus Signal Checksum Error

U0416 00

Invalid Data Received From Vehicle Dynamics Control Module

U0416 72

Invalid Data Received From Vehicle Dynamics Control Module Message Counter Incorrect

U0416 74

Invalid Data Received From Vehicle Dynamics Control Module Bus Signal Checksum Error

U0418 00

Invalid Data Received From Brake System Control Module

U0418 71

Invalid Data Received From Brake System Control Module Invalid Data

U0418 72

Invalid Data Received From Brake System Control Module Message Counter Incorrect

U0418 74

Invalid Data Received From Brake System Control Module Bus Signal Checksum Error

U0422 00

Invalid Data Received From Body Control Module

U0422 70

Invalid Data Received From Body Control Module

U0422 72

Invalid Data Received From Body Control Module Message Counter Incorrect

U0422 74

Invalid Data Received From Body Control Module Bus Signal Checksum Error

U0424 00

Invalid Data Received From HVAC Control Module

U0432 00

Invalid Data Received From Multi-axis Acceleration Sensor Module

U0432 72

Invalid Data Received From Multi-axis Acceleration Sensor Module Message Counter Incorrect

U0432 74

Invalid Data Received From Multi-axis Acceleration Sensor Module Bus Signal Checksum Error

U0438 71

Invalid Data Received From Trailer Brake Control Module

U0465 00

Invalid Data Received From Power Take-Off Control Module

U1501 00

LIN Bus 1

U1502 00

LIN Bus 2

U1510 00

(K9 Body Control Module) LIN Bus 1 Lost Communication With Device 0 (B165 Intrusion Sensor Module)

(K33 HVAC Control Module) LIN Bus 1 Lost Communication With Device 0 (A26 HVAC Control)

(A11 Radio) LIN Bus 1 Lost Communication with Device 0 (A20 Radio/HVAC Control)

U1511 00

(K26 Headlamp Control Module) LIN Bus 1 Lost Communication With Device 1 (E13L Headlamp Assembly-Left)

U1512 00

(K26 Headlamp Control Module) LIN Bus 1 Lost Communication With Device 2 (E13R Headlamp Assembly-Right)

U1513 00

(K26 Headlamp Control Module) LIN Bus 1 Lost Communication With Device 3 (E13L Headlamp Assembly-Left)

U1514 00

(K26 Headlamp Control Module) LIN Bus 1 Lost Communication With Device 4 (E13R Headlamp Assembly-Right)

U1515 00

(K9 Body Control Module) LIN Bus 1 Lost Communication With Device 5 (M75 Windscreen Wiper Motor)

U1516 00

(K9 Body Control Module) LIN Bus 1 Lost Communication With Device 6 (B110 Battery Sensor Module)

U1517 00

(K9 Body Control Module) LIN Bus 1 Lost Communication With Device 7 (Sunroof Sunshade Module)

U1519 00

(K40 Seat Memory Control Module) LIN Bus 1 Lost Communication With Device 9 (S52 Outside Rearview Mirror Switch)

(K40 Seat Memory Control Module) LIN Bus 1 Lost Communication With Device 9 (K96 Mirror Control Module)

U151A 00

(K9 Body Control Module) LIN Bus 1 Lost Communication With Device 10 (B117 Windscreen Outside Moisture Sensor)

U151B 00

(K9 Body Control Module) LIN Bus 1 Lost Communication With Device 11 (K61 Sunroof Control Module)

(K40 Seat Memory Control Module) LIN Bus 1 Lost Communication With Device 11 (S79P Window Switch - Passenger)

U1520 00

(K9 Body Control Module) LIN Bus 2 Lost Communication With Device 0 (P25 Power Sounder Content Theft Deterrent Alarm Module)

U1521 00

(K26 Headlamp Control Module) LIN Bus 2 Lost Communication With Device 1 (E13L Headlamp Assembly-Left)

U1522 00

(K9 Body Control Module) LIN Bus 2 Lost Communication With Device 2 (K65 Tyre Pressure Indicator Module)

(K26 Headlamp Control Module) LIN Bus 2 Lost Communication With Device 2 (E13R Headlamp Assembly-Right)

U1523 00

(K26 Headlamp Control Module) LIN Bus 2 Lost Communication With Device 3 (E13L Headlamp Assembly-Left)

U1524 00

(K9 Body Control Module) LIN Bus 2 Lost Communication With Device 4 (Front Seat Heating Control Module)

(K26 Headlamp Control Module) LIN Bus 2 Lost Communication With Device 4 (E13R Headlamp Assembly-Right)

U1526 00

(K9 Body Control Module) LIN Bus 2 Lost Communication With Device 6 (Rear Seat Heating Control Module)

U152C 00

(K9 Body Control Module) LIN Bus 2 Lost Communication With Device 12 (K18 Electronic Compass Module)

U152D 00

(K9 Body Control Module) LIN Bus 2 Lost Communication With Device 13 (S3 Automatic Gearbox Change Lever)

U1530 00

(K9 Body Control Module) LIN Bus 3 Lost Communication With Device 0 (M74P Window Motor - Passenger)

U1534 00

(K9 Body Control Module) LIN Bus 3 Lost Communication With Device 4 (M74D Window Motor - Driver)

U1538 00

(K9 Body Control Module) LIN Bus 3 Lost Communication With Device 8 (S79D Window Switch - Driver)

U153A 00

(K9 Body Control Module) LIN Bus 3 Lost Communication With Device 10 (S79P Window Switch - Passenger)

U1540 00

(K9 Body Control Module) LIN Bus 4 Lost Communication With Device 0 (M74RR Window Motor - Right Rear)

U1544 00

(K9 Body Control Module) LIN Bus 4 Lost Communication With Device 4 (M74LR Window Motor - Left Rear)

U1548 00

(K9 Body Control Module) LIN Bus 4 Lost Communication With Device 8 (S79LR Window Switch - Right Rear)

U154A 00

(K9 Body Control Module) LIN Bus 4 Lost Communication With Device 10 (S79RR Window Switch - Left Rear)

U154B 00

(K9 Body Control Module) LIN Bus 4 Lost Communication With Device 11 (K49 Rear Seat Control Module)

U1793 00

14V Power Module Lost Communication with Hybrid Powertrain Control Module on Powertrain Expansion Communication Bus

U1795 00

14V Power Module Powertrain Expansion Communication Bus Off

U179A 00

Lost Communication with Hybrid Powertrain Control Module 2

U1803 00

Lost Communication with Hybrid Powertrain Control Module 2

U1806 00

Battery Energy Control Module High Voltage Energy Management Communication Bus Off

U1807 00

Battery Charger Control Module High Voltage Energy Management Communication Bus Off

U180A 00

Electric A/C Compressor Control Module High-Speed Communication Bus Off

U180B 00

Battery Energy Control Module High-Speed Communication Bus Off

U180C 00

Battery Charger Control Module High-Speed Communication Bus Off

U180D 00

Electronic Brake Control Module Chassis Expansion Communication Bus Off

U1811 00

Battery Energy Control Module Powertrain Expansion CAN Bus Off

U1814 01

Powertrain Wake Up Communication Circuit Short to Battery

U1814 02

Powertrain Wake Up Communication Circuit Short to Ground

U1814 04

Powertrain Wake Up Communication Circuit Open

U1815 00

Lost Communication with Drive Motor Control Module A on Powertrain Expansion Communication Bus

U1816 00

Lost Communication with Drive Motor Control Module B on Powertrain Expansion Communication Bus

U1817 00

Lost Communication with Hybrid Powertrain Control Module on Powertrain Expansion Communication Bus

U1818 00

Lost Communication with Engine Control Module on Powertrain Expansion Communication Bus

U1821 00

Lost Communication with 14V Power Module on Powertrain Expansion Communication Bus

U1826 00

Lost Communication With Multi-Axis Acceleration Sensor Module on Bus B (Chassis Expansion Bus)

U1827 00

Lost Communication With Steering Angle Sensor Module on Bus B (Chassis Expansion Bus)

U182D 00

Lost Communication with Hybrid Powertrain Control Module 2 on Powertrain Expansion Communication Bus

U182E 00

Drive Motor Control Module 1 Lost Communication with Hybrid Powertrain Control Module 2 on Powertrain Expansion Communication Bus

U182F 00

Drive Motor Control Module 2 Lost Communication with Hybrid Powertrain Control Module 2 on Powertrain Expansion Communication Bus

U1831 00

Drive Motor Control Module A Lost Communication with Hybrid Powertrain Control Module on Powertrain Expansion CAN Bus

U1833 00

Lost Communication with Electronic Brake Control Module on Chassis Expansion Communication Bus

U1838 00

Lost Communication with Battery Charger Control Module on High Voltage Energy Management Communication Bus

U1839 00

Auxiliary Transmission Fluid Pump Control Module Lost Communication with Engine Control Module

U183A 00

Lost Communication with OnStar Module

U183B 00

Auxiliary Transmission Fluid Pump Control Module Lost Communication with Transmission Control Module

U183C 00

Auxiliary Transmission Fluid Pump Control Module Lost Communication with Hybrid Powertrain Control Module 2 on Powertrain Expansion Communication Bus

U183E 00

Lost Communication with OnStar Module on Low Speed Communication Bus

U1844 00

Battery Energy Control Module Lost Communication with Hybrid Powertrain Control Module on Powertrain Expansion Communication Bus

U1845 00

Drive Motor Control Module 1 Lost Communication with Hybrid Powertrain Control Module

U1846 00

Drive Motor Control Module 2 Lost Communication with Hybrid Powertrain Control Module

U1849 00

Drive Motor Control Module 1 Lost Communication with Transmission Control Module

U184B 00

Lost Communication with Electronic Climate Control Module on Low Speed Communication Bus

U184C 00

Lost Communication with Instrument Cluster on Low Speed Communication Bus

U184D 00

Lost Communication with Radio on Low Speed Communication Bus

U184E 00

Lost Communication with Inflatable Restraint Sensing and Diagnostic Module on Low Speed Communication Bus

U184F 00

Electric A/C Compressor Control Module Lost Communication with Engine Control Module

U1850 00

Drive Motor Control Module 2 Lost Communication with Transmission Control Module

U1858 00

Electronic Brake Control Module Lost Communication with Hybrid Powertrain Control Module on Chassis Expansion Communication Bus

U185A 00

Lost Communication with Battery Energy Control Module on High Voltage Energy Management Communication Bus

U185B 00

Battery Energy Control Module Lost Communication with Hybrid Powertrain Control Module 2 on High Voltage Energy Management Communication Bus

U185C 00

Battery Charger Control Module Lost Communication with Hybrid Powertrain Control Module 2 on High Voltage Energy Management Communication Bus

U185D 00

Fuel Injector Control Module Lost Communication with Engine Control Module

U185E 00

Fuel Injector Control Module Lost Communication with Body Control Module

U1860 00

Electric A/C Compressor Control Module Lost Communication with Hybrid Powertrain Control Module 2

U1861 00

Battery Charger Control Module Lost Communication with Engine Control Module

U186A 00

Electronic Brake Control Module Lost Communication with Engine Control Module

U186A 00

Electronic Brake Control Module Lost Communication with Transmission Control Module

U1876 00

Drive Motor Control Module 1 Lost Communication with Engine Control Module

U1879 00

Drive Motor Control Module 2 Lost Communication with Engine Control Module

U1885 00

Battery Energy Control Module Lost Communication with Hybrid Powertrain Control Module

U1886 00

Battery Energy Control Module Lost Communication with Engine Control Module

U1888 00

Hybrid Powertrain Control Module Lost Communication with Battery Energy Control Module

U18B9 00

Primary High Speed CAN Bus Subnet Configuration List

U18BF 00

Secondary High Speed CAN Bus Subnet Configuration List

U1900 00

Lost Communication With Speech to Text Interface Module

U1901 00

Lost Communication With Front Controls Multifunction Interface Module

U2099 00

High Speed Communication Enable Circuit

U2099 01

High Speed Communication Enable Circuit Short to Battery

U2099 02

High Speed Communication Enable Circuit Short to Ground

U2099 04

High Speed Communication Enable Circuit Open

U2099 5A

High Speed Communication Enable Circuit Not Plausible

U2100 00

CAN Bus Communication

U2101 00

CAN Bus Maximum Configuration List

U2103 00

Fewer Controllers On Bus Than Programmed

U2105 00

Lost Communication with Engine Control Module

U2106 00

Lost Communication with Transmission Control Module

U2107 00

Lost Communication with Body Control Module

U2108 00

Lost Communication with Electronic Brake Control Module

U2127 00

Lost Communication with Front HVAC Control Module

U2139 00

Lost Communication with Column Integrated Module

U2144 00

Lost Communication with Distance Sensing Cruise Control Module

U2176 00

Lost Communication with Power Take-Off Control Module

U2178 00

Lost Communication With Trailer Interface Control Module

U2400 00

Fuel Injector Control Module High Speed CAN Bus Off

U2401 00

Battery Energy Control Module Dedicated Bus 1 Off

U2602 00

Battery Energy Control Module Lost Communication with Hybrid Powertrain Control Module 2

U2603 00

Battery Energy Control Module Lost Communication with Hybrid Battery Interface Control Module 1

U2604 00

Battery Energy Control Module Lost Communication with Hybrid Battery Interface Control Module 2

U2605 00

Battery Energy Control Module Lost Communication with Hybrid Battery Interface Control Module 3

U2606 00

Battery Energy Control Module Lost Communication with Hybrid Battery Interface Control Module 4

U2608 00

Electric A/C Compressor Control Module Lost Communication with Hybrid Powertrain Control Module

U2609 00

Battery Charger Control Module Lost Communication with Hybrid Powertrain Control Module

U2611 00

Auxiliary Transmission Fluid Pump Control Module Lost Communication with Hybrid Powertrain Control Module

U2612 00

Battery Charger Control Module Lost Communication with Hybrid Powertrain Control Module 2

   


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