szilik

I just bougth a Lexus RX400h i have driven 6000km without any problem. After it, i found athat the engine is continously working without shoutdowns.
I go to the local offical Lexus dealership and service for 300k service and for repair.
They changed 'everything' but the probelem is still exits. They said choke tube was leaked, and changed.
It seems it is better now, but after a few ICS reset, this problem is coming back 10/3 starts. The fuel what it eat is increased from 8.1l/km to 12-18l/km or above, when hybrid drive not working.
The service didnt found any error code, any problem. They offered new hybrid drive and battery, because it may cause the problem. I think it should be an ECU problem, because more than half time it is ok.
I heard about may ECU needs calibration file (i found only US but i am in EU is it good for use)? or (front) speed sensor not working/communicating but not error code...
Any intetion, guess whats next?
Thank you, Karoly