EPC light on, 51 plate VRS

[LexVRS]

Ok guys, EPC and check engine light came on and car went into limp, AA scanned it and both throttle sensors showed up, the throttle will not rev at all just sits at the 1200 rpm limp mode

 

took to garage and the first thing they replace is the fuel relay...this confused me why would they do that? but still, now they are doing the throttle pedal... if that doesn't fix it then what next? plus how much do you think i should be spending? (im in the trade, so i may source some parts myself if this is going to sky rocket)

 

thanks guys

[LexVRS]

Ok so update, ecu was fried! the lamba sensor wire dragged on the ground spiked the ecu and burnt it out