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Old 11-08-2013, 04:48 PM   #1
VictorOfHavoc
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Default p2096 on SH FXT (last effort to fix the car before getting rid of it)

Hello Nasioc,

im getting the the p2096 code after installing a cnt downpipe and getting a stage 2 tune. I'm in a 2010 FXT 4eat and this CEL is bugging me like no other. My tuner says that it seems to be an intermittent electrical issue and the cel comes on when I'm not on boost, or driving hard, just highway cruising. It's pretty annoying and I just ordered a new sensor to see what will happen. The new sensor will be here Monday, but in the meantime does anyone here have some light they can shed?

UPDATE: now back at stock with the same recurring issue. Please see post at the end of the page.

thanks guys!
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Last edited by VictorOfHavoc; 04-14-2014 at 04:24 PM.
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Old 11-08-2013, 07:12 PM   #2
atomicfire
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What are you using to tune the car?
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Old 11-08-2013, 07:14 PM   #3
VictorOfHavoc
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Open-source and tactrix cable with torqued performance
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Old 11-12-2013, 10:31 AM   #4
VictorOfHavoc
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update:

this morning my stereo randomly cut out, the car hasn't thrown me the p2096 code in over 100 miles now, and last night the brake light stayed on as if the bake fluid was low.

oh, how great it is to have a used subaru! So, there's an electrical issue somewhere, but the question is where...

does anyone have any thoughts?
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Old 11-13-2013, 10:38 AM   #5
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the p2096 code appeared again this morning, accompanied by c0057, c0047, and c0071.

I'm going to change out that rear O2 sensor as soon as I can and see what happens. Nobody really has any thoughts?
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Old 11-14-2013, 05:19 PM   #6
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So P2096 is the standard CEL that typically comes with a catless downpipe, but this should be deleted as part of the tune.

I have no idea what those Cxxxx codes are? See if you can get them read.
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Old 11-14-2013, 05:24 PM   #7
VictorOfHavoc
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Quote:
Originally Posted by mechatricity View Post
So P2096 is the standard CEL that typically comes with a catless downpipe, but this should be deleted as part of the tune.

I have no idea what those Cxxxx codes are? See if you can get them read.
From the research I've done the C codes apparently show with the 2096 as a can read issue and get tripped randomly...so that's why right now I'm just focusing on the P code

My tuner told me that on the newer subarus the rear O2 will make the car run rich if disabled.
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Old 11-14-2013, 07:16 PM   #8
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A few things to check:

1. Are you using a O2 sensor anti-fouler or extension?
2. Are both O2 sensors plugged in (front + rear) and working?

Going stage 2 doesn't turn off the code for an O2 sensor. The tuner should only turn off the code for catalyst efficiency (P0420). Just because you're stage 2 doesn't mean you can take out either (or both) O2 sensors. The front O2 sensor is used for closed loop feedback fueling and the rear O2 sensor is used for long term feedback fueling. You can get your car tuned to turn off parts of feedback fueling so you can remove the rear O2 sensor but most people don't do that.

If you're not using any anti-foulers or O2 extensions, then one of your O2 sensors might be bad. The specific code you have is for the rear O2 sensor which is a narrow band sensor. It's cheap and easy to replace. I'd try making sure everything back there is plugged in, or maybe replacing that sensor first and see if that fixes it.
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Old 11-14-2013, 09:05 PM   #9
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Quote:
Originally Posted by atomicfire View Post
A few things to check:

1. Are you using a O2 sensor anti-fouler or extension?
2. Are both O2 sensors plugged in (front + rear) and working?

Going stage 2 doesn't turn off the code for an O2 sensor. The tuner should only turn off the code for catalyst efficiency (P0420). Just because you're stage 2 doesn't mean you can take out either (or both) O2 sensors. The front O2 sensor is used for closed loop feedback fueling and the rear O2 sensor is used for long term feedback fueling. You can get your car tuned to turn off parts of feedback fueling so you can remove the rear O2 sensor but most people don't do that.

If you're not using any anti-foulers or O2 extensions, then one of your O2 sensors might be bad. The specific code you have is for the rear O2 sensor which is a narrow band sensor. It's cheap and easy to replace. I'd try making sure everything back there is plugged in, or maybe replacing that sensor first and see if that fixes it.
1: not using an anti-fouler or extension
2: both are plugged in, and both seem to be functioning properly, but the rear might have an intermittent electrical problem (I think).

Yeah I bought a rear O2 but haven't had a chance to plug it in yet, hopefully I'll get it done during lunch tomorrow at work... unlike my wrx the fxt is high enough of the ground to squeeze in under there without having to jack it up
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Old 11-17-2013, 03:55 PM   #10
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so i installed the new o2 sensor and no code, yet... I've only driven it 60 or so miles so far, but now every time i accelerate i hear a boost leak and something smells kind of like burnt oil. I checked for leaks and found none. I bought the car used two weeks ago and right now when i looked at the oil it's black sludge. I'm going to change that and the air filter today and see how she runs. I have a feeling the bpv is leaking or the intercooler to intake manifold hose has slipped.

anybody have any other suggestions? This car just seems to be a dog compared to my wrx
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Old 11-17-2013, 06:09 PM   #11
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changed out the air filter, oil, oil filter, and bpv gasket. Took her for a quick ride and it threw the codes again...when i accelerate now it kind of smells like burning rubber, almost like a clutch smell (automatic?)...and the boost screeching noise is still existent...this is getting quite annoying.
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Old 11-17-2013, 06:11 PM   #12
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I have until Tuesday afternoon to fix this car (before i have to hand it off to my girlfriend for her roadtrip down to texas) if anyone can help i'd really appreciate it. I really don't want to hand her a car with a ton of issues.
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Old 11-17-2013, 06:56 PM   #13
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Take the tmic off and check your throttle body hose I think it's probably just hanging there on the to side.
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Old 11-17-2013, 10:39 PM   #14
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Quote:
Originally Posted by nate_fisher View Post
Take the tmic off and check your throttle body hose I think it's probably just hanging there on the to side.
There's just one problem. The threads from the turbo flange to ic flange were crossthreaded last time it was put on... Thoughts on how to more easily remove this one bolt?

EDIT: Wasn't going to have time this weak to do it myself so I took it to subaru. They fixed the intercooler coupler, the crossthreaded bolt, and also fixed a small exhaust leak. No strange sounds thus far and they only charged 100 bucks to do all this (surprised me I wasn't bent over on this one). The car seems to have more power right now, so we'll see how things go in the next few days. I reset the code again and I'm going to have my tuner look at the logs one more time to make sure all is well.

Fingers crossed!

Last edited by VictorOfHavoc; 11-18-2013 at 02:11 PM.
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Old 11-20-2013, 08:39 PM   #15
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everything seemed fine enough, the car was making more power, and then today the code appeared again. It just randomly appears and before it does, the gas mileage plummets... Nothing seems to be wrong at all, and the car just throws that stupid cel. I'm getting ready to sell this car if that cel pops up again. I hate it with a passion now.

Could this be a bad fuel pump?
bad injectors?
another exhaust leak?
some random electrical issue?

anybody?
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Old 04-14-2014, 02:46 PM   #16
VictorOfHavoc
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update:

So i removed the tune, the downpipe, and am now sitting stock. The rear O2 sensor has been changed, a new DP gasket is in, and the car has no exhaust leaks to speak of (subaru verified). Subaru did a full clean reinstall of the stock map and the car is throwing me the p2096 code AGAIN.

If anyone has any other suggestions please do tell me. I'm taking the car to subaru again on wednesday. I've already dropped over 500$ into trying to fix it, and i'll most likely drop another 4 to 500 this wednesday at subaru. Short of just wrecking the car I no longer know what to do. The atrocious gas mileage is enough to make me want to get rid of the car entirely. I'm barely managing 200 miles to a tank of all highway driving...

So does anyone have any thoughts? please....
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Old 04-14-2014, 03:19 PM   #17
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I am getting the same code on my '12. It's bank 1 02 sensor (rear down-pipe sensor), post catalytic. I got under my car and noticed my Invidia down-pipe's weld has cracked all the way around the down-pipe on the cat which is where the exhaust is most likely leaking out and causing the sensor to go off. That is just my assumption. My other one was that the 02 sensor was bad.

I don't know what you have but I would make sure you don't have exhaust leaking out before the down-pipe 02 sensor. The rear 02 from what I hear is just emissions and it should not really be anything to worry about as far as harming your vehicle.
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Old 04-14-2014, 03:23 PM   #18
VictorOfHavoc
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Quote:
Originally Posted by Wireeater View Post
I am getting the same code on my '12. It's bank 1 02 sensor (rear down-pipe sensor), post catalytic. I got under my car and noticed my Invidia down-pipe's weld has cracked all the way around the down-pipe on the cat which is where the exhaust is most likely leaking out and causing the sensor to go off. That is just my assumption. My other one was that the 02 sensor was bad.

I don't know what you have but I would make sure you don't have exhaust leaking out before the down-pipe 02 sensor. The rear 02 from what I hear is just emissions and it should not really be anything to worry about as far as harming your vehicle.
i just changed to a brand new stock downpipe...

actually on these newer vehicles it's long term fuel trim, meaning over time your car runs richer and richer until it throws this code (too lean). it can only run so rich before having issues... Mechanically all fuel is not being burned away and most likely there is some soot and/or raw fuel being dumped into your cat. The car runs stupid rich on the highway and for me i get 20 mpg average (all highway).
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Old 04-15-2014, 10:54 AM   #19
VictorOfHavoc
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bump it
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Old 05-09-2014, 03:49 PM   #20
VictorOfHavoc
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front O2 sensor...thanks to atomicfire above. your suggestion was the closest, though my sensor wasn't bad it would intermittently read weird so it was very difficult to catch.

mods please close
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