With Osiris you can turn the code off so that the ECU ignores it and does not throw the CEL. The code will still be stored in the ECU, however, it just doesn't throw the check engine light and put the car into limp mode.

There are certain system vital codes however that will still cause the car to run in limp mode like ignition and throttle position sensor codes.

Basically if its not a vital function of the engine (like emissions stuff) you can turn it off with Osiris and the car will ignore it

 

woa woa woa....

so am i understanding that installing my test pipes without the O2 sensor trick will throw a CEL and put my car into limp mode not matter what?!? not cool....

 

Most likely.

 

I installed my test pipes with O2 sensors and threw some codes but never went into limp mode.....the car drove fine. Lawrence used Osiris to adjust the ECU parameters so their limits are never exceeded. This allowed me to pass emissions due to the fact that CEL's are no longer triggered. My AF is essentially monitored with my aftermarket gauge.

 

Just to clarify, limp mode does not mean that your car won't run, and if you don't have aftermarket guages, access to a dyno, or diagnostic equipment you most likely won't know it happened. The ECU just pulls timing and makes the car run rich to try and prevent bad things from happening. It will also do this if you get a bad tank of gas and it detects too much knock

 

Sort of, this doesn't always happen though. It is really easy to do the O2 Bung, just look it up, it will take 10 minutes to do the install.

 

so limp mode doesn't effect the immediate performance of the car in a hp/trq sense?

 

Yes it does effect it, but not to a massively noticable extent

 

well screw that lol gotta get that o2 bung thing figured out then....

 

LOL, I quoted the wrong post! Whoops.

 

you can get an O2 non-fouler plug for like $5 that screws into the bung and places the O2 sensor farther from the exhaust gasses that works for a lot of people.

 

Here;

http://www.esmhome.org/library/o2-se...2nonfouler.pdf

How-to Non-foulers

 

thank you very much! i'll post vids of before and after once installed for those who may be curious.