U2101 CHEVROLET - MAXIMUM LIST OF CAN CONTROL MODULES NOT PROGRAMMED
POST UPDATED IN May, 2023
U2101 CHEVROLET - MAXIMUM LIST OF CAN CONTROL MODULES NOT PROGRAMMED
Control modules that connect to serial data circuits via the high-speed and low-speed GMLAN (Engine General Local Area Network) have constant monitoring of serial data communication during normal operation of the car. The modules exchange operating information and commands, and although they have pre-recorded information about the messages they need to exchange on the circuits for each virtual network, these messages are monitored. In addition, some periodic messages are used by the receiving module as an indication of the availability of the transmitting module. In each of these messages, the identification number of the transmitting module is sent.
The U2101 OBDII fault code is set on Chevrolet vehicles when the subnetwork configuration is not programmed or there are less than two modes programmed.
The reasons why the U2101 OBD2 diagnostic code is set in your Chevrolet vehicle are as follows:
The steps to follow to correct the DTC U2101 OBDII code on your Chevrolet are: