Toxic warning light

[dlivingstone_19]

I've got the toxic warning light coming up on my dash,
took to renault and they replaced the upstream and
downstream 02 sensor. The light went off and has now
come back on. either they haven't done what they said or there
is something else which is causing a problem.

any help?

 

[lemonnobby]

any misfires, lack of power, juddering or does it drive normally?

 

[medici999]

my toxic light is also on, sorry for hijack, is this just due to decat?

 

[dlivingstone_19]

seems to drive normal, technician i know pointed out that revs would fluctuate by little bit when idling. calling renault tomorrow. any advice?

 

[lemonnobby]

Yea decat will cause light to come on.

Ideally you need to see what was on the clip print out if it says any thing about misfires even though you dont feel them, i had one that said it had a misfire but i couldnt get it to misfire done some guess work fitted a coil and its never been back.

 

[dlivingstone_19]

well i know my cup is completley standard so shouldnt be anything like decat.

if it was to be a coil how much do they cost to fit? expensive

 

[lemonnobby]

you could proberly do it your self if you take your time only take 15 mins if that. coil pack is about £70 i think im not quite sure but i dont think they have done it correct see what they say.

The decat was ref to the above question (not by you)

 

[dlivingstone_19]

ok will do. so apart from coil pack could it be anything else?
dangerous on engine if i keep driving?

 

[lemonnobby]

it could be anything to be honest spark plug, coil pack, wiring, faulty oxygen sensor (i know they just fitted 2) cat, you really need to see the print out when you take it back say you wish to see the old clip print out before they start work on the car (so they cant do another copy) and the lastist clip print out