speaktobrett Member 38 Member For: 16y 12d Gender: Male Location: Melbourne Posted 20/02/10 01:22 PM Share Posted 20/02/10 01:22 PM I have a BA MkII XR6 that has done 120,000km's... It uses on average 13.5L/100km's.Ive been told that if I replace the o2 sensor, this should make my fuel efficiency improve. What I would like to know is:1. Is this true?2. Do I actually need to replace it???3. What is a o2 sensor? Link to comment Share on other sites More sharing options...
Xrfranjo Member 350 Member For: 17y 3m 5d Gender: Male Location: Bonnyrigg Heights, NSW Posted 21/02/10 01:55 AM Share Posted 21/02/10 01:55 AM If you want fuel economy ...........buy a Yarris Link to comment Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 6m Gender: Male Location: @ my laptop Posted 21/02/10 01:58 AM Share Posted 21/02/10 01:58 AM An oxygen sensor is a sensor which is placed in the exhaust to measure the oxygen content of the spent gases, The ecu will adjust injector on time to acheive the correct air fuel mixture based on the signal that the o2 sensor reports.With age they get slow and produce less voltage which the ecu reads this as a lean situation and makes the injectors spray in more fuel which will mean you are acyually running richer than what is being reported. Link to comment Share on other sites More sharing options...
speaktobrett Member 38 Member For: 16y 12d Gender: Male Location: Melbourne Posted 21/02/10 03:35 AM Author Share Posted 21/02/10 03:35 AM If you want fuel economy ...........buy a YarrisHOHOHOHO!! It's spelt "Yaris", comedian.An oxygen sensor is a sensor which is placed in the exhaust to measure the oxygen content of the spent gases, The ecu will adjust injector on time to acheive the correct air fuel mixture based on the signal that the o2 sensor reports.With age they get slow and produce less voltage which the ecu reads this as a lean situation and makes the injectors spray in more fuel which will mean you are acyually running richer than what is being reported.Thanks man... having done 120,000km's and it being only 5 years old. It shouldn't really need replacing, should it? Link to comment Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 6m Gender: Male Location: @ my laptop Posted 21/02/10 03:49 AM Share Posted 21/02/10 03:49 AM It's about the age where it could be faulty, but there are a host of things which can lean to it failing prematurely. Link to comment Share on other sites More sharing options...
Stink Senior Moron Donating Members 1,059 Member For: 15y 7m 5d Gender: Male Location: Sunshine Coast..... somewhere Posted 21/02/10 07:22 AM Share Posted 21/02/10 07:22 AM Thanks for the info Ratter, so how much to replace the o2 sensor for a BA/BF? and who do we go to to do the job Link to comment Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 6m Gender: Male Location: @ my laptop Posted 21/02/10 07:32 AM Share Posted 21/02/10 07:32 AM (edited) A decent brand may cost you $100-150, If BF only the pre cat 1 may need replacing, it is something you could do yourself if handy with some tools or your mechanic should be able to do it for you Edited 21/02/10 07:32 AM by ratter Link to comment Share on other sites More sharing options...
daztbo FLY-FPV Donating Members 474 Member For: 15y 3m 30d Gender: Male Location: Greensborough Vic Posted 26/04/11 02:07 PM Share Posted 26/04/11 02:07 PM easy to do just take the heat shield off and un plug and un screw took me bout 25 mins Link to comment Share on other sites More sharing options...
phil545 Member 47 Member For: 15y 2m 10d Posted 31/05/11 05:38 AM Share Posted 31/05/11 05:38 AM Genuine from Ford are about $450!!! I got an aftermarket one for $90 from a ford member on another site - pm if you want to know more. I only replaced my first one (I have a BF) as I will get the second one turned off when I get it tuned. Has made only a very small difference to my economy but I think that's more because the second one is giving all the funny readings due to the high flow cat.Once I get it tuned I would expect my economy will be betterCheersPhil Link to comment Share on other sites More sharing options...
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