This car runs fine all the time but when driven say at about 30mph the esp light will come on, then scan in esp and it says ref to engine, so scan in engine and we have the P0101 code. Have replaced both Lambda sensors and the maf all oe parts. have smoke checked no leaks, checked plugs and leads, checked connections on maff with data availble it is a digital maff too. could not scope as my pico is a 3223 and the4000 series does the scope for these type maf. Have put the old maf back and both the same results. Any help would be nice thanks

Have you looked at EGR?

Hth
Craig

Yes we did have a quick look but no more than the fact there where no codes for it. What is your suggest .

Just that EGR faults are often disguised as MAF faults and vice versa! If the EGR valve is stuck open then it will affect the amount of air flowing into the engine! I would check whether its operating correctly and the airways are clear before I went any further!

Hth
Craig

Have you got a VIN number?
Thanks Jm