Help i have these codes
 

P0036
P0138
P0172
P0300

Do these have anything to do with the O2 sensor on the dp? let me know guys, i cleared them with the interceptor but i wanna know what they are

p0172 is rich, p0300 is random misfire, don't know the others off the top of my head.

ok the rich one i can understand since im tuned for a 2.6 pulley but i got a 2.8 on it

bump

P0036 is the 2nd 02 sensor

ok i knew that one was gunna go, i pulled the wires outta the harness on the o2 sensor and didnt know which way they went back in do you have a pic of how the wires go in?

what is P0138?

i keep throwing
P0300
P0036

and i have to keep clearing them

P0138 HO2S Circuit High Voltage Sensor 2 ECM, PCM

https://www.cobaltss.net/forums/problems-service-maintenance-69/cobalt-dtc-thread-merged-12015/

alright what does that mean? What could have caused that

it also has to do with the 2nd O2 sensor...

ok i knew it would throw that, i ripped the wires out of the sensor connection on the rear tranny mount and dont know how they go back into the harness.

Usually throws that code when the sensor is not connected to the car. you need to have the sensor disabled.

Your misfire code is something to worry about. Go get tuned properly.

i am tuned properly, i never threw that code ever, just now since the O2 sensor is messed up

check to make sure the wires on your rear o2 arent touching metal. then check the fuse in your fuse panel under your hood called "EXH". if ur o2 wires are touching metal, it'll blow that fuse. make sure they didnt accidently get cut or aanything. (they wont have to be completely seperated to be cut and touching metal.)

you are not properly tuned if your rear O2 is not disabled. hence all of your codes. See what I mean? Now your car thinks it's rich because of voltage issues, but in reality it might not be. Your shortband AFRs are going to be out of whack.