Engine and service light on

[Surfhunny]

Ive just been out in my 54Reg Megane 1.6 CC and the engine light and service light came on, no alteration in performance or engine noise that I can tell. Will be popping to my friendly mechanic tomorrow to check it out. I seem to remember this came on when I needed my coils changing, but the engine was rough then.

I guess what I'm asking is this, is this combination of lights a general warning (manual says Toxic Fumes) or is it specific to the coils?

Any help welcomed, I like to have a vague idea about what to expect. My mechanic is trustworthy and has worked on the demon car since its first breakdown.

[davelowe]

The answer often becomes clear when any fault codes are read - they lead to the right destination. BUT - if your mechanic is confused, and he/she might well be - post the results up on here for all to see. We could help! Might well be something simple such as an O2 sensor...

[Surfhunny]

It is indeed the O2 sensor. Not got it booked in yet, is it a long job or will it just a day job, just so I can arrange time off etc. even simple jobs such as changing bulbs seem to be a big old pantomime. Also in true dizzy tart style I forgot to ask how much it's likely to cost, any ideas?

[davelowe]

I don't have the manual in front of me at the moment, but I would expect any competent mechanic should be able to replace one in 15 minutes. My guess is £70 for the part and a labour charge (but it is very much a guess).