As is known, Cummins ISX15 engines with Motorola CM870 ECU had certain problems with non-compliance with the configuration, loss of communication with the units and the presence of errors after disabling the EGR valve. Our engineers have developed and tested a 100% solution for completely disabling the EGR while maintaining the operation of Cruise and the "mountain" brake for Volvo and Peterbilt with an ISX15 engine.