Downstream Oxygen Sensor? - Renault Forums :: Independent Renault forum

Go Back   Renault Forums :: Independent Renault forum Problem Solving Ask the Experts Engines

Notices

Engines Engines and other oily matters

RenaultForums
... Quick links
... Forum list
... Your dashboard
... Search the forums
... List new posts
... List today's posts
... List 0 reply posts
... Live post list (iSpy)
... Most viewed threads
... Special offers
... Members
... Member list
... Member map
... Member's gallery
... Who is online?
... Social groups
... Forum leaders
... Information
... FAQ index
... Garage list
...   Map version
... Glossary
... View our rules
...   Advertising
...   Privacy policy
... Contact us
... Feedback
... Fun stuff
... Arcade games
... Chat room
... Folding@Home
... Data
... Who drives what?
... Who supports who?



Use the drop-down below to display RenaultForums in the language of your choice.

Downstream Oxygen Sensor?

Engines


Reply
 
Thread Tools Search this Thread Display Modes
Old 22nd May 2013   #1
Unsunghero
Unsunghero is
has no status.
Junior Member
 
Join Date: Sep 2012
Posts: 20
Nominated 0 Times in 0 Posts
TOTW/F/M Award(s): 0
Thanks: 3
Thanked 0 Times in 0 Posts
Question Downstream Oxygen Sensor?

Hello!

The other day my Megane II's "service" light came on, as well the toxic fumes sensor or whatever it is.

I took the car to the garage and the diagnostic machines threw up this:


They said it's nothing serious, and it's booked in to be fixed, which leaves me wondering, what exactly is the downstream oxygen sensor?

Keep it simple, please!
Currently in Unsunghero's garage:
2002 Megane II - 2.0 16v - Blue
Unsunghero is offline   Reply With Quote

5 Lastest Threads by Unsunghero
Thread Forum Last Poster Replies Views Last Post
Downstream Oxygen Sensor? Engines mickeybo 3 3238 22nd May 2013 09:46 AM
My Blue Renault Megane II 2.0 16v My mottah! IT66 1 872 21st February 2013 02:54 PM
Strange "SPEECH" issue on Renault Megane... Electronics Unsunghero 5 1947 29th January 2013 02:53 PM
When climate control is on 'Auto', the engine... Heating & cooling Unsunghero 12 1283 12th September 2012 08:26 PM
2.0 16v Megane II (2002) - Strange engine issue Engines dave_mezza2006 10 1985 12th September 2012 06:07 AM

Sponsored Links
Advertisement
 
Old 22nd May 2013   #2
spacecadet
spacecadet is
in the chair
Diamond member
 
Join Date: Mar 2010
Posts: 721
Nominated 1 Time in 1 Post
TOTW/F/M Award(s): 0
Thanks: 1
Thanked 117 Times in 106 Posts
Re: Downstream Oxygen Sensor?

It is the sensor which measures the oxygen concentration after the exhaust gases have been through the cat. The signal is compared with that from the sensor in front of the cat (upstream) to check that the cat is effective.
Either the sensor is defective or a wire in the circuit is broken.
Currently in spacecadet's garage:
Laguna 2 1.6 51 plate 5-speed
spacecadet is offline   Reply With Quote
Old 29th May 2013   #3
Unsunghero
Unsunghero is
has no status.
Junior Member
Threadstarter
 
Join Date: Sep 2012
Posts: 20
Nominated 0 Times in 0 Posts
TOTW/F/M Award(s): 0
Thanks: 3
Thanked 0 Times in 0 Posts
Re: Downstream Oxygen Sensor?

Thanks for the reply.

The garage fixed this for me yesterday but this morning the engine (or toxic fume) light was on again...

So I've been back to the garage and car has thrown out the exact same error code, less than 24 hours after the 'fixed' it...

They're going to look at it next week but how strange... :/
Currently in Unsunghero's garage:
2002 Megane II - 2.0 16v - Blue
Unsunghero is offline   Reply With Quote
Old 29th May 2013   #4
mickeybo
mickeybo is
has no status.
Platinum member
 
Join Date: Oct 2007
Posts: 1,373
Nominated 9 Times in 9 Posts
Nominated TOTW/F/M Award(s): 5
Thanks: 2
Thanked 262 Times in 253 Posts
Re: Downstream Oxygen Sensor?

What the fault code df 083 was saying oxygen sensor heating circuit. New oxygen sensor was not required. Most likely cause of defect loss of 12v feed to heating element within sensor Hth Regards Mickeybo
Currently in mickeybo's garage:
1996 Renault Clio 1.9 Diesel.
mickeybo is offline   Reply With Quote
The Following User Says Thank You to mickeybo For This Useful Post:
Unsunghero (29th May 2013)
Reply

Tags
downstream, oxygen, sensor

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT. The time now is 04:22 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright 2005-2009 RenaultForums
 
Inactive Reminders By Mished.co.uk and FTP-Anime.com