Need a bit of help if possible please guys?

This car came in as a non start and fixed the problem by replacing a faulty MAP sensor and tightening the pins on the Fuel Pressure Sensor, codes have cleared and all is good!

My problem is that during the diagnostic procedure I suspected a software issue at one point and so updated it to the latest version, needless to say it didnt solve the problem.

Although my original fault is now cured I seem to have created a new fault; since the reflash I now have the above DTCs logged and the car wont go above 5 mph!! The DTCs are P1550 Electronic Throttle Control Power Management, and P1526 Throttle Control Malfunction! Im guessing its a bit like on VAGs when you reset adaptations and then have to readapt the thottle but I cant find any option to do this on tech2??

Anybody got any clue what I've done and how to fix it because I honestly havent got a clue!

Thanks
Craig