Hey guys, sorry if this question has already been asked but i have a 08 cobalt tc. My performance mods are injen cold air and GM stage 1. I want to get a catless dp but i dont wanna see the check engine light. If i get the catless dp will i throw a code? and what are some suggestions on a good dp?? thanks for the help

 

Get a Hahn or a ZZP. They have an o2 bung so you won't throw any codes or check engine lights. I have a Hahn catless turbo back and I haven't thrown any codes at all and I'm still on a stock tune.

 

thanks for the advise. anyone else know anything about this?? if it wont throw a code than im buying right now. I just wanted to do a little research first...

 

You will still throw a code. I get the 2237 - O2 pumping circuit code.

 

ok what about the dp w/high flow cat? will i still see power gains? will it throw a code?

 

You wont throw a code with the Hahn Dp

 

If its catless, you will. Catted should be fine.

Catless cars - give it 5-10000 miles, you will get a cel.

 

I say get the high flow cat....in addition to not having the noxious fumes, you will actually be able to pass emmisions when the time comes. The power difference will be practically nothing.

People seem to forget that in this day and age cars are designed from the start to work with catalytic converters. Back in the day of the 70's muscle cars with carbed big blocks it made big gains to just gut out the cat...as tech gets better and better it does less and less for performance to do that....in many cases it actually reduces performance in modern cars to do that.

 

I get that code occasionally too.

 

If you don't want a code (for whatever reason, not like it does anything. can easily have it turned off) then just leave it stock. If you go catless, or a hi flow cat, you WILL eventually get an engine light. Having a bung for the sensor means nothing.

 

Ditto! Took about a month for it to pop, I just disabled it.

 

Never thrown a code with my catless...been about 5k miles with the ZZP with the extended O2 bung.

 

Watch you RPD on the wideband screen next time you do a WOT. It took awhile for mine to happen too. I have the same DP, more mileage. It JUST started happening to mine, Im at about 10K on the downpipe.

 

Mine didn't throw an actual code on the dash. The RPD showed no data for the Wideband, I check with HPT and there was a code pending. I reset it, RPD showed the data again.

 

I have a catless DP from Synapse for almost a year. No codes - No problems.

 

I got the CIA catless and have yet to throw a code

 

Hahns new dp will not throw a code base on there bung design.

 

Get one with the o2 sensor location like this and you'll get no codes

 

I got a catless dp and jus went ahead and deleted the code from the system via hp tuners

 

Thanks alot guys.

 

Synapse catless dp for me and no codes! (2,000 miles so far)

 

I too am looking at getting a catless DP and eveywhere I read so far says if you get the ZZP, CIA or Hahn Catless DP because of the angle of the O2 sensor bung you will not get a CEL, are you saying this is not true? If someone where to get the High-Flow catted down pipe from one of the vendors I mentioned above are they at less risk of throwing a CEL? Also if someone without HP Tuners software or Superchips got a CEL code for this how could they go about reseting it - would taking it to the dealership work?

 

We also have a catless down pipe for the LNF now. It comes with the angled o2 sensor bung, so you won't throw a code. I'll get a picture up shortly.

 

I have the ZZP with the angled bung. I get the 2237 O2 Pumping Circuit code. Finally showed up after 10k+ miles. I had read about it on HPT and hadn't seen it myself until JUST recently.

 

If you have a Trifecta Tune, can HP tuners cancel out codes on it?