Hi guys, this is my first post on here and there is a bit of history, so I'll start from the beginning!
I have a 2007 5Dr PFL with 43300 miles on it. I have owned it for about 2 1/2 years now and love it.
A few months ago I had a downpipe and secondhand 200cell cat fitted to the cat back system I already had. I then started running Bluefin stage 2.
Soon after, the engine light came on, so I plugged the bluefin in to get the code - P0133. I looked it up to find out what it meant - 'HEATED O2 SENSOR CIRCUIT SLOW RESPONSE BANK 1 SENSOR 1'. Contacted Ford who said it was the lambda sensor in the downpipe. So I bought a brand new Bosch replacement and fitted. The fault cleared and all was well.
Now, a couple of months and 3000 miles later the light has come back on with the same fault! Surely the sensor can't have failed already? Although I have emailed the supplier as it came with a 12 month warranty. Just waiting for a response.
Anyway, what else could cause this fault to reoccur?
Just for your information, the car has been serviced by Ford from new, it is used daily and is a family car. I don't drive it like I stole it ( I'm 35 married with kids so my boy racer days are long gone!). I drive it just like any normal family car, with the occasional bit of fun.
Right I think I've given just about all the information that is likely to be needed!
What's going on? Cos I ain't buying new lambda sensors every few months!
Any help and advice would be greatly appreciated.
Nick.