Lambda sensor help please

[ben_edwards30]

I know this has been asked loads of time before, i just used the search but couldn't find my answer.
My engine managment light is on so had it checked today and came up with:

o2 sensor, bank 1, sensor 2

Which sensor is it though, the one in the down pipe or the one after? The car is a LCR 225, Has a Miltek cat back exhaust if that matters.

Where is the best place to get one?

Thanks for any help

 

[ben_edwards30]

Anyone please? I'm gonna double check all the wiring 2moz as a few post had faulty wires or water in the plug. I think it's the post cat sensor but not 100% just want someone to comfirm it and also tell me best online place to get a replacement.

Cheers.

 

[DJ-LIAMC]

sensor 2 is post cat after the downpipe shoudnt affect cars performance

 

[ben_edwards30]

No doesn't affect the cars performance at all it's just annoying having the eml light on, i've had it turned off once but came back on after a couple of days so just want to fix the problem properly.

 

[DJ-LIAMC]

im guessing the lambda needs replacing or the cat is naffed

 

[ben_edwards30]

how can you tell if it's the lambda or the cat?

 

[V5-Ant]

iv got exactly the same problem... its annoying!

 

[ben_edwards30]

iv got exactly the same problem... its annoying!

have you got the same fault code?

 

[Johnny Hotrod]

I've got the same problem too! Car goes for mot next week is it likely to effect emissions?

 

[ben_edwards30]

how can you tell if it's the lambda or the cat?

Anyone?

 

[Johnny Hotrod]

how can you tell if it's the lambda or the cat?

Good question! On a side note though a friend of mine works for a VW/Seat/Audi specialist & he says never to fit non genuine sensors as they have heard of lots of people having bought them & had problems with the engine management light coming on. May be worth bearing in mind if anyone is looking to buy a new sensor. This happened to me with the coolant temp sensor too. Fitted a genuine one & all has been fine since

 

[DJ-LIAMC]

how can you tell if it's the lambda or the cat?

You can try checking all the cables connecting to the lamba for breaks and water damage or try replacing your lambda to see if it sorts the problem out, if that doesnt work then it must be your cat take it off to check if its blocked or crumbled.