2G CEL & o2 sensor problems

[tsi40422]

Well when I bought the car it had a CEL and I scanned it and it said it has bad oxygen sensor the rear one, and a knock sensor was bad, but the car has a catless DP full 3'" turboback.....

Well this car wastes a TON of gas compared to my brothers gst

Not sure if its the o2 sensor or what that is making it waste so much gas

 

[DSMOCTANE]

-Perhaps you can try purchasing a straight pipe (in place of the cat) that has a threaded hole for that O2 sensor. You may need a flange welded in your exhaust also to prevent the CEL from returning on. Theres some local tuner shops where Im from (Connecticut) that will weld those in order to pass emissions! Shop on Ebay those straight pipes are cheap as hell!

 

[synthetek]

Not sure if its the o2 sensor or what that is making it waste so much gas

The rear o2 would not cause it to run any different, the front one would. The rear o2 sensor is to verify that the cat is working if you remove the cat you will get the rear o2 cel, it does not affect performance.

-Perhaps you can try purchasing a straight pipe (in place of the cat) that has a threaded hole for that O2 sensor

He does not have a cat he has a down pipe that eliminates the cat.

 

[Krusemann99GST]

Just get an o2 simulator and trick the o2 into thinking there is still a cat and your check engine light should go off. There for sale at extreme psi for 21 dollars. That's what I'm going to do I have a 3" Megan racing dp that eliminated the cat. But why it wastes so much gas shouldn't be the rear o2.

 

[tsi40422]

Ok thanks for the input

 

[synthetek]

Just get an o2 simulator and trick the o2 into thinking there is still a cat and your check engine light should go off.

You can also turn it off with Dsmlink if you have or plan on geting it.

 

[tsi40422]

Well I was planning on modding it a bit but I just lost my job on Thursday so.....yeah haha