If you have updated to kmanager 4.2.0, uploaded k20a3 map and having problems, all you need to do is update to 4.2.3 BETA and make sure you keep your older kal.
I ran into problems with 4.2.0 and kal generated by this version. The symptoms are:
1. Hard to crank
2. Car started with high idle (2K+) and CEL
3. CEL cannot pull a code or CEL with Daughter Board Communication Error code
4. Limp mode
5. Ran datalog at kmanager but not reading one single data
6. ECU tickled a few times during power on
My combo to solve this issue was:
Kmanager version 4.2.3 with Kpro version 4.2.0 filmware, uploaded kal that was generated by kmanager 4.1.5. MAKE SURE YOU KEEP A COPY OF OLD KAL AND DO NOT USE 4.2.0 KAL!