Why, in 2 pages of advice, has no-one suggested this? You could even drive it to another garage and get them to do it, it might be a 10p fix .........
i bought an MR2 last year, it had a big misfire and the engine light on. Took an OBD, discovered what the fault was, did a bit of research on my phone, picked the car up for half what it was worth and fixed it for £50.
Sure, the dealer is a tool but if you can get the car cheap because of the faults then why not?
Err I did suggest this?
So did I, along with getting it cheaper .