SubieSquirrel Posted May 5, 2018 Share Posted May 5, 2018 So I have an 05 Outback 2.5i manual with cali emissions bought it with seized bottom end so replaced short block and other maintenance stuff. Car runs and drives fantastically but after 2-3 drive cycles sets a p0420 so I put a spacer on B1S2 reset and did idle relearn. Fast forward 4 drive cycles all monitors are set. Two more cycles later bam get a p2096. According to identifix there are reports of cars with the 420 replacing cats then getting 2096 which is then remedied by new downstream 02. So I put in a brand new denso B1S2 and got 2096 after 5-6 drive cycles. Last night I drilled out the spacer hoping maybe it would help but idk if I should just be preparing for a cat. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
08SpecB_DE Posted May 6, 2018 Share Posted May 6, 2018 Can you watch live data? What are your o2's doing while driving down the road and at idle? Link to comment Share on other sites More sharing options...
ArmyVetMP Posted May 6, 2018 Share Posted May 6, 2018 Be careful with Aftermarket Cat's. Subaru's are super sensitive to aftermarket Cat Converters. I replaced mine on my 2010 Legacy last year, only to have it go bad within a year. Somethin with the engine programming and what not is what I was told. Link to comment Share on other sites More sharing options...
meier motor sports Posted May 6, 2018 Share Posted May 6, 2018 just fix it right and forget the cheats Link to comment Share on other sites More sharing options...
08SpecB_DE Posted May 7, 2018 Share Posted May 7, 2018 I haven't seen an aftermarket cat last more than 2 years on any vehicle with most failing in the first year. OEM is the way to go for cats and o2/af sensors. Link to comment Share on other sites More sharing options...
SubieSquirrel Posted May 7, 2018 Author Share Posted May 7, 2018 The upstream a/f ratios hang around 2.6 volts while cruising the downstream 02s move between .6-.8 while cruising down highway, honestly have not yet checked what the new one is doing with the spacer might on my way in today Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Xantinan Posted January 6, 2021 Share Posted January 6, 2021 (edited) Hey, how's your progress? Did you manage to solve this problem? My friend has a similar situation right now and doesn't know the best way to fix it. He recently purchased a diagnostic device from https://thinkdiag.co.uk therefore, it was not difficult for him to determine what kind of problem he had. The only question left is how best to solve it, but all the car service stations that are close to his house are closed, maybe there is an easy way to solve this problem? I would be very grateful for your answer. Thank you in advance and have a nice day! Edited January 11, 2021 by Xantinan Link to comment Share on other sites More sharing options...
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