Exchange of PTC - HVIL keeps car from starting

[iumentum]

Hello,

I have a 2019 M3 with the all too common PTC fault. I exchanged the PTC myself, but when I connected everything back together, the main contactors would not close and I got an HVIL fault (high voltage interlock loop).

I traced it to the connector on the PTC, and I really could not understand what the issue is. It occured to me that it may be that I have not gotten the connectors properly seated. Has anyone else experienced this, and maybe you have some advice? (Good to have some tips before I delve back into the issue ...)

 

[iumentum]

Exchanged the PTC to another one I got, and now the HVIL fault is gone. Apparently something wrong in the plug of one of the PTC heaters I got from the wrecker.