chicagochuck
New member
2001 grandprix gt
It had a po420 code about 2 yrs ago, I put in a oxygen sensor pipe entender and the code went out. I also had the resonator removed eventually when it went bad.
I sold the car to a family member oct 2015... In may of 2016 the straight pipe where the resonator/straight pipe was welded to the downpipe cracked. SO I told him to go get a straight pipe re welded where it was originally attached
Fast forward to today I'm working on the car trying to figure out the po446 , I changed the vent valve but code still remains. I also noticed that the exhaust is stronger than I remember. I get under the car and the converter is gon as well, its straight piped all the way to the mufflers. crazy things is its not throwing a p0420 code at all.
I guess i should have went with him to the exhaust shop, not sure if it'll be a problem but Im sure thats not what he really wanted done.
Didn't think that would be possible to not throw the 420 code. Just wanted to share that story
It had a po420 code about 2 yrs ago, I put in a oxygen sensor pipe entender and the code went out. I also had the resonator removed eventually when it went bad.
I sold the car to a family member oct 2015... In may of 2016 the straight pipe where the resonator/straight pipe was welded to the downpipe cracked. SO I told him to go get a straight pipe re welded where it was originally attached
Fast forward to today I'm working on the car trying to figure out the po446 , I changed the vent valve but code still remains. I also noticed that the exhaust is stronger than I remember. I get under the car and the converter is gon as well, its straight piped all the way to the mufflers. crazy things is its not throwing a p0420 code at all.
I guess i should have went with him to the exhaust shop, not sure if it'll be a problem but Im sure thats not what he really wanted done.
Didn't think that would be possible to not throw the 420 code. Just wanted to share that story
