The Mégane II Owners' Club

The charging voltage seems high to me, I would expect between 14-14.8v.
Is it a new battery?

Amazing.
Good call ChrisM

Cut your losses and sell as parts.

Any updates?

The engine light only goes off when you start the engine. You would know if it was the dephaser, you would hear a rattle on starting the engine like a box of spanners. Then it would go quiet. Fluctuating revs sounds like something else. A vacuum leak? However, your noise sounds exhaust linked so it ...

Are you sure the noise is from the tear and not front right?
This sound like the dephaser to me.

Also, I believe you are on Android so give Torque free a whirl. So many of those apps are rubbish too.

I have two of these one wifi and one bluetooth. Both work but on various cars they are not able to recognise all pids. However, they do connect, which is your real question. I also got a wired Autel one because I was convinced the connectionless ones were junk. I tried a colleagues expensive one whi...

Running rich is probably the most likely answer. Now what would cause that? Dodgy Cam sensor, dodgy coils, dodgy plug, etc. So without some other testing and codes its' hard to say but one thing is for sure. GO TO ANOTHER GARAGE! Replacing both O2 sensors will not fix this issue. Is it missing at all?

I doubt its both sensors to be honest.
Do you have any codes that you can provide?

Thanks again Wanda, what about my other queries?

Not sure that I can help at all but I'll keep asking questions anyway
Does it drive?

I don't think it should start just by pressing the start button, you either have to press the brake or the clutch as a safety feature so that the car won't jerk forward.

Take the cover off and see if anything is obvious?

Is it an android or iPhone app?