GM fault codes

17,703 codes · 2,212 vehicle records · 180 ECU records · 10,756 live-data parameters

Shared-name brands using this data:

Codes 17,703

Code	Description	Brands	System
U0256	Lost Communication With Front Controls Interface Module A	26	Network
U0257	Lost Communication With Front Controls/Display Interface Module	21	Network
U0258	Lost communication with battery cooling system	18	Network
U0259	Lost communication with special purpose vehicle control module 'A'	21	Network
U025A	Lost communication with gear P	21	Network
U025B	Lost communication with special purpose vehicle control module 'C'	18	Network
U025C	Lost Communication With Special Purpose Vehicle Control Module D	21	Network
U025D	Lost communication with front controls interface module 'B'	18	Network
U0260	Lost communication with seat control switch module 'A'	18	Network
U0261	Lost communication with seat control switch module 'B'	19	Network
U0262	Communication with gateway lost	18	Network
U0263	Lost Communication With Speech Recognition Module	21	Network
U0264	Lost Communication With Camera Module - Rear	24	Network
U0265	Lost Communication With Image Processing Sensor A	13	Network
U0266	Lost Communication With Image Processing Sensor B	10	Network
U0268	Lost Communication With Image Processing Sensor D	10	Network
U0269	Lost Communication With Image Processing Sensor E	9	Network
U026A	Lost Communication With Image Processing Sensor F	9	Network
U026B	Lost Communication With Image Processing Sensor G	9	Network
U026C	Lost Communication With Image Processing Sensor H	9	Network
U026D	Lost Communication With Image Processing Sensor I	9	Network
U0284	Lost Communication With Active Grille Air Shutter Module A	19	Network
U0285	Lost Communication With Active Grille Air Shutter Module B	12	Network
U0286	Lost communication with radiator anti tamper device	18	Network
U0287	Lost Communication With Transmission Fluid Pump Module A	26	Network
U0288	Lost Communication With DC/AC Converter Control Module A	23	Network
U0289	Lost communication with DC/AC converter control module 'B'	18	Network
U0291	Lost Communication With Gear Shift Control Module B	25	Network
U0292	Lost Communication With Drive Motor Control Module B	24	Network
U0293	Lost Communication With Hybrid/EV Powertrain Control Module	38	Network
U0294	Lost Communication With Powertrain Control Monitor Module	23	Network
U0295	Lost Communication With AC/AC Converter Control Module	21	Network
U0296	Lost Communication With AC/DC Converter Control Module A	21	Network
U0297	Lost communication with AC/DC converter control module B	19	Network
U0298	Lost Communication With DC/DC Converter Control Module A	34	Network
U0299	Lost Communication With DC/DC Converter Control Module B	25	Network
U029A	Lost Communication With Hybrid/EV Battery Pack Sensor Module	26	Network
U029B	Lost communication with drive motor control module 'C'	19	Network
U029C	Lost communication with drive motor control module 'D'	19	Network
U029D	Lost Communication With NOx Sensor A	29	Network
U029E	Lost Communication With NOx Sensor B	28	Network
U02A1	Lost Communication With NOx Sensor C	12	Network
U02A2	Lost Communication With Reductant Quality Module	13	Network
U02A3	Lost Communication With Particulate Matter Sensor	19	Network
U02A9	Lost Communication With Charge Air Cooler Coolant Pump A	10	Network
U02AE	Lost Communications With Hybrid/EV Battery Coolant Pump	10	Network
U02BB	Error Sensor Power Supply 4	7	Network
U02BD	Kaotatud side öönägemise juhtmooduliga	8	Network
U02C4	Lost Communication With AVM	8	Network
U02CE	Lost Communication With ALC	8	Network

Some brand data is extracted from diagnostic files and may contain manufacturer-specific wording. General SAE J2012 descriptions are used where available.