Hi i got a skoda fabia 1.4 16v petrol 2005 the engine light was on and i had code p0401 so i cleaned egr vavle and the pipe and the tb then cleared the code and come back after one day the code was p0402 this time i checked everything but not sure what it can be any ideas Thanks 

Check for vacuum leaks in the brake servo pipework, fix any you find and clear the codes.

Ok i have a look and update thank you