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2004 Renault Megane O2 sensor/cat converter

Tiny
EMMAKING1987
  • MEMBER
  • 2004 RENAULT MEGANE
  • 2.0L
  • MANUAL
  • 85,000 MILES
Engine management light came on. Garage did a code reading and showed a failed o2 sensor. I believe it was the one behind the cat converter. It has now been replaced.

the engine is quite noisy (petrol engine), and they mentioned possible issues with the cat converter?
its not had the cambelt changed so that is booked in to be checked/changed along with possibly the water pump.

i know cat converters are expensive if damaged. Im just wondering if now the o2 sensor has been changed that the cat converter will be ok (if not already damaged, will check.)
and will the noisy engine be because of cambelt & cat converter issues?
i dont know much about cars so need advice and concerned its going to get expensive.
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Wednesday, August 26th, 2015 AT 4:40 AM

6 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
That sensor does not effect the converter in any way. It merely monitors it to let you know if the converter is not doing it's job properly.

You need to find out where that noise is originating from first.
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Wednesday, August 26th, 2015 AT 6:54 AM
Tiny
EMMAKING1987
  • MEMBER
  • 3 POSTS
http://youtu.be/FDjCXozO0wM

ive upload a short video of the engine running.

thank you.
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Wednesday, August 26th, 2015 AT 7:17 AM
Tiny
EMMAKING1987
  • MEMBER
  • 3 POSTS
Thanks for responding tho. I cant get it seen till next week and still need to drive it so hopefully it'll last till then.
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Wednesday, August 26th, 2015 AT 7:23 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Still no good. Even if you remove the https from the beginning which shouldn't be there, it still doesn't work.
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Wednesday, August 26th, 2015 AT 7:25 AM
Tiny
THIS IS MIKE
  • MECHANIC
  • 686 POSTS
I updated the video link, it should work now. :)
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Wednesday, September 16th, 2015 AT 11:54 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
That sounds more like a loose timing chain to me.
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Wednesday, September 16th, 2015 AT 1:32 PM

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