o2/lambda sensor fault

[tonaz]

had my car hooked up to the rs tuner and it says there is an o2 sensor fault (the car has a de-cat by the way).

is this actually a fault with the sensor or is it just because i don't have a cat?

if it's a fault how much is it to get new sensors and is it easy to change them?

thanks in advance for any advice, tony

 

[Scott™]

New sensors are about £80 on the bay iirc.

 

[W111ALG]

Can be had for 50 elsewhere if you do a google search!


Probably just cause of the de-cat though!

 

[tonaz]

Can be had for 50 elsewhere if you do a google search!


Probably just cause of the de-cat though!

how can i find out whether there is a problem or not?

 

[W111ALG]

Is it the pre or post CAT probe?

 

[tonaz]

Is it the pre or post CAT probe?

not sure. will it say? i'll have to hook it up again

 

[Mark One]

http://www.cliosport.net/forum/showthread.php?t=314560

that's my thread on lambdas and where I got mine.

If your MPG is down then your upstream lambda could be gone. The fault you've got is almost certinally due to the useless 2nd (downstream) lambda. Have you got the emissions light on the dash? To clear it, bung the downstream lambda hole (bungs can be had off ebay), but leave the second lambda plugged in, just cable tie it up in a bag somewhere. then obviously clear the fault.
If you remove the downstream lambda (as in disconnect it) then I think it throws up a fault for that too.

 

[tonaz]

http://www.cliosport.net/forum/showthread.php?t=314560

that's my thread on lambdas and where I got mine.

If your MPG is down then your upstream lambda could be gone. The fault you've got is almost certinally due to the useless 2nd (downstream) lambda. Have you got the emissions light on the dash? To clear it, bung the downstream lambda hole (bungs can be had off ebay), but leave the second lambda plugged in, just cable tie it up in a bag somewhere. then obviously clear the fault.
If you remove the downstream lambda (as in disconnect it) then I think it throws up a fault for that too.

cheers, aye the emissions light is on. will have a read of that thread in a sec.

i'm not even sure which is which or where they are. i have seen one of them before. anyone got any pics of them insitu?

 

[tonaz]

Mark One could you put a link to the type of bung i need please. will try this and see if it helps. thanks

 

[mattjk]

Is it a 182 or a 172, I have a feeling you can't trick and remove the downstream cat on the 182. Ok on the 172 though

 

[tonaz]

it's a 182. so what can you do then? will this give me any loss of performance???

 

[tonaz]

anyone?

 

[Fastchip]

Already answered you by email, you always need a good working FRONT Lambda sensor.
Otherwise it wont pass MOT and have less performance.

 

[tonaz]

cheers henk i will have a look when i get home. how do i tell if the front sensor is ok?

 

[Fastchip]

cheers henk i will have a look when i get home. how do i tell if the front sensor is ok?

Then it doesn't show up as a fault code. If you see something like O2F sensor fault, you need a new one.
Quite common actually.

 

[tonaz]

Then it doesn't show up as a fault code. If you see something like O2F sensor fault, you need a new one.
Quite common actually.

hi henk. i re-connected the rs tuner and the o2 sensor (front) fault has gone now since i erased and refreshed the codes?

it now says initialisation backup memory and also electronic throttle control limits acquired (not a fault)

 

[Fastchip]

OK, all normal. Now the O2 sensor fault will probably come back which if it does, means you need to replace it.

 

[tonaz]

OK, all normal. Now the O2 sensor fault will probably come back which if it does, means you need to replace it.

cheers for that. so i take it the car will not be suffering any performance loss at the minute? do i need to send you another live data log?

 

[tonaz]

can someone also point me in the right direction of a front lambda sensor for the 182 please?

 

[tonaz]

bump

 

[Rossy197]

quick search on google my friend

http://www.lambdasensor.com/main/renault.htm

 

[Fezza_rs]

Both sensors are the same part no. bosch no. 0258006046 they are £69.09 inc vat from your local andrew pages in newburn or newcastle. Hope that helps

 

[tonaz]

cheers people. much appreciated!

 

[tonaz]

oh... anyone got any experience of fitting these? i am not even sure where the front sensor is. can only seem to locate the one that goes into the cat?

 

[Rossy197]

1 before the cat - 1 after the cat

they screw into the exhaust / cat

 

[tonaz]

nice one. got a new lambda. just need to work out how to fit it ha

 

[sideways danny]

22mm spanner, plug.....erm, that's it

 

[tonaz]

cheers mate, sorry for being thick but what do i need a plug for and where do i get it?

 

[tonaz]

22mm spanner, plug.....erm, that's it

ah s**t you mean plug it in! i'm a proper idiot like

 

[Rossy197]

LOL tonaz that made me chuckle, you sorted it yet though mate ?

 

[W111ALG]

Just be careful they can be a b**ch to get out sometimes!

 

[Rossy197]

im thinking " Smashed knuckles " is on the horizon

 

[tonaz]

LOL tonaz that made me chuckle, you sorted it yet though mate ?

just done it there mate. took some shifting like but got there in the end. hope this is it sorted, won't be happy if it's not like! ha