Looks like a good diagnosis, after running through the old fuel and replacing with bp ultimate, then resetting code it's come back, garage has suggested bringing it in for a look at next Friday, they advised it may be possible to clean and that may solve the problem, I'm more sceptical and as above believe the sensor needs changing. I know these are circa £100 to buy and don't wish to be frightened by the cost the dealer may charge including fitting and labour!, has anyone replaced one themselves? I would not know where to start looking for it. Is there a guide to replacing?

 

You cant really clean o2 sensors IMO.

Search for 'walker' branded ones on here, lot of people have had success including me and are circa £75. Not that difficult really once you get it jacked up on axle just a bit of fiddling about underneath in tight gaps.

 

Just ordered another one( second ) for mine ( Pre cat sensor ) as it threw the same code a while back. I cleared the code and it hasn't returned but it's quite clear it's running a little rich so something is definitely not right.

They seem to last a couple of years or so with a lot of short runs.

 

Thanks for that, will search for a walker one, I assume it's down the front end of the car on the manifold ?

 

A rich condition kills them sooner

Wideband sensor die even sooner.