CO Potentio metre or CO Adjustment resistor

[kenny]

The one on the throttle body is commonly known as the throttle position sensor, (TPS), correct term being 'throttle position potentiometer'. believe fault code may be 'TP' Didn't think it was anything to do with C0 or its measurement. The one on the exhaust is commomly known as the 'Lambda sensor' correct term being 'Heated oxygen sensor'. believe fault code may be 'H02S'. Sorry this info still doesn't help, but you need the actual fault code, or for whoever ran the test to point to the component at fault. :(

[Nickysteveo]

Thanks for everyone’s replies.
:D
It looks like it boils down to being either the Throttle potentio meter or the Lambda sensor that is the cause of the problem. Does anyone have any spares of either of these for sale or know where I can get them without incurring the ridiculous prices of Renault.

cheers
Nick

[Wobba]

Dont pay Renault anything for either.

Get a genuine Bosch Lambda sensor, you can get Universal ones but I've heard they sometimes suck bad.

It is located on the downpipe, just before the catalytic converter. Getting the old one off may be a tough job though, they seize on solid due to rust and heat. They have a three pin plug socket attached usually. Just unclip that and the lambda mini-heatshield and undo...

The TPS, the red bit on the side of the throttle body...just get a 2nd hand throttle body with the TPS attached. These can be adjusted and if messed with can be a pain to set right again. The two little screws in the side can be loosened to adjust it, but personally I'd avoid touching it!

There are ported/polished TB's out there for sale too...gives a tiny bit of improved air induction if you can find one...

[kenny]

The TPS is the easiest thing to do but the dearest, the lambda is the cheapest but hardest. One thought though, check to see if the TPS is securely fixed and has not moved as it will when the throttle moves if not secure. It's only 2 screws and the body should not move.

[MatBrown]

Check the wires going to the TPS too.


Mat.