Seat Toledo V5 2002

[Chiptech]

I have the above and I have a problem with the management light keep re-appearing, the light has appeared for the third time. When tested at my local dealer it pointed to a faulty oxygen sensor despite them being unable to find anything wrong with that part of the system so I had it replaced. It then came on again and as i had been using supermarket fuel and it happened around that time, I decide to part with another £220 and get it changed. After 200 miles the fault has re-appeared and I know that they will hold their hands up and say they havent a clue as after the very first time it was just re-set.

What are my options with regard to getting this fault escalated by the garage to somewhere where they have the skills to deal with this once and for all.

Thanks.

[Chiptech]

update to this. I've now had some other lights appear EPS and one other 3 letter acronym, and have been reliably informed by my local Seat dealer that it is the mass airflow sensor to blame, I'll let you know if this returns again.