Hey, been using the forum as a fantastic resource for a while now, letting me fix bits and pieces on my car, although I've decided to join and start posting!
About 8 months ago my engine fault light came on. I got it checked out and the rear lambda sensor was reading high. I left it, and now with my MOT coming up, really need to get it fixed. I took it to Ford and they say the whole catalytic converter and both front-and-rear sensors will need replacing. After getting the cost (several hundred), I've decided to do it myself, or at least get the parts myself and get an independant garage to fit it.
The question is, how do I know whether it's definitely the whole cat and both sensors, or whether it's just the rear sensor?
I don't own a diagnostics scanner, although I imagine you might need some information from it to work it out, so any thoughts or advice would be fantastic.
FYI, my car is 2003 Fiesta Ghia 1.4 Petrol