I have an M130 #5552 with GPA 01.07.0003, February 2016 Firmware receiving inputs from 2 LTCs.
The two lambda readings are visible and look OK but closed loop state is permanently disabled and the problem has eluded an authorised agent/tuner who spent some time seeking a solution.
Support suggested a Firmware upgrade to July 2019 but I note that only the GPR version is listed.
I now recall that I briefly operated the engine with IAT and Airbox MAF sensors disconnected and I wonder if this has led to closed loop state being disabled and if there is a simpler reset option ?
I also am aware that the Airbox MAF values are much lower than anticipated.