Good morning. So after i changed my OEM stereo to an aftermarket one i have this problem that my parking heater won´t start and when i read the fault codes with my esid 2, there is many codes that have this time error/ Zeitfehler reading. The codes are TCM, SCM, SDAR, ONS, UHP, TPMM, SLM, EHU, STC, SRM, RDCM. I have tried to switch the old stereo back, but it doesn´t fix the problem. I changed the clock time with esid 2 and with the old stereo too but it doesnt fix the problem. Everything else works perfectly fine. My car is Saab 9-3 1.9 Tids 2008 Manual. i have tried to solve this problem few months now but haven´t made any progress.