You also sad you're running an AP so you're in a better case, since you're actually running a tune designed for your mods

 

ecu options set #2 bit 1->0

 

Ive been having this probly too just in the past 6 weeks. Ive had the same mod setup for 10k miles, and just since winter here in upstate ny I randomly every week or so get the code... I dont know why... I tried to do the rear o2 sensor disable thru the AP and it tripped another code (I forget the number and cleared it) but it basically said, rear 02 sensor isnt functioning... Is there another way to disabled the rear o2 to prevent the CEL?

 

Not with an AP.

 

I'm having this same problem :l


I know old thread, need help :O

 

I fixed mine just recently. Replaced the rear o2 sensor and its been gone for 180 miles so far. AND I passed inspection with my test pipe, so I know everything was working right.

I also tried replacing all exhaust gaskets before that.

 

Still CEL free over a thousand miles later. Passed inspection as well.

Check your rear O2 sensor people. Would have saved me a ton of time if I tried that first.

 

I replaced my rear O2 and it went away for 200 miles. Now it is back =/. It was a used O2 though, so not sure if I should try again with a new one.

 

Thread resurrection

My '11 is getting this CEL as well. I've had it twice since I got my car tuned. I have a wide band o2 and my car at idles around 14.7 - 15.5.

 

how much did the new rear 02 sensor run you guys?

 

mine is a 14 and im having the same issue. Only removed the 02 sensor to add the test pipe. but i think it was slighly stripped, but still fits tight.

CEL comes on once a week or every 200 miles. i reset it and it stays off until then.

 

This happened to me after I installed one of those right angle O2 extender doohickeys. All that thing did was cause the ECU to go from throwing P0420 to throwing P2096. When I logged rear O2, I saw it clear as day. I guess by pulling the O2 sensor out of the exhaust flow and nesting it in an oxygen rich pocket in the O2 extender, this resulted in low voltage (lean) signal. Just pull the rear O2 from the exhaust altogether, plug the bung, and disable the rear O2 sensor permanently.

 

my car (evo x 2011) was tuned 3 weeks ago and this Thursday the p2096 code came up. i have upper +lower pipes, front mount intercooler, intake, full turbo back exhaust system by ETS, and 3 port boost by Cobb

before i was running with an Afe intake, o2 open dump eliminator

do you guys have any info of why i got this code after a tuned

 

Test pipe? Or HFC? Are you using a spacer/extender on the rear o2? Who tuned the car? Best thing to do would be to ask them.

 

high flow catalytic converter and for the second question i really don't know
it was tuned by JR Tuned
i went there and they just told me to run another map. which i think is my previous map (that map had no boost controller or HFC or FMIC)