My wife's car (seems to be contagious!) threw the emissions light on today, pedal test returns P1555 which is "Throttle position sensor, load signal, not plausible with engine load"
Would it seem obvious that this is the throttle position sensor or could it be something else? Google suggests it can be down to a faulty/dirty throttle body but there's also mention of a faulty MAF?
Would a TECH2 be of use here to help pinpoint the fault? Car is using petrol quite heavily at the moment.