I know that when you remove your cat for a midpipe you'll most likely throw a CEL code, what are the codes that most commonly show up?

for some reason I get

P2096 Target A/F Feedback too lean (2nd most common one)
P0442 Evaporative Emission Control System Leak Detected
P0139 O2 Sensor Circuit Slow Response (Bank 1 Sensor 2) (most common one)

I've gotten some wierd ones too, like the wrong key in ignition code.

I was wondering if there were any other common ones that show up for you guys?

 

Any other mods you have on your car?

 

Was there a reason you added the mid pipe other than power and sound?
The only Mid pipe associated CEL I can think of would be cat efficiency and rear O2 codes

 

Sohn Adapter and AFE Short Shifter (doubt short shifter would cause an issue)

the Sohn was the first thing I added to the car, didn't like thinking that it was dirty oil going into the apex seals, so the adapter was put in so all that goes into the OMP is clean idemetsu premix. I was running for a good 7 months before I put the midpipe in.

I never had a CEL until I put the RB dual resonating midpipe in.

 

i doubt your p0442 has anything to do with the mid pipe, however the p0442 (evap system leak)
could cause or have an effect on the p2096 (lean condition) depending on what the leak is.

how did u mount the rear o2, directly to the pipe or spaced out with an antifouler?

 

it's spaced out with an antifouler, you think that's the case?

 

<br />Could you give more details? Thanks very much! I'm new here.

 

what details are you talking about?