2016 Silverado 5.3 02 Sensor CEL

[Chevrojayy97]

Hey guys, first off I’ll give a little background. Bought my truck in April 2016 with 2 Miles on it. Been awesome an no issues thus far. June 2016 I added a cat back exhaust system professionally installed and that’s the only modification I’ve done. So today, December 22, 2017, I hop in the truck to go to lunch, and the CEL comes on. Borrowed a buddy’s code reader and got the following codes. Looks like it’s all 02 sensor related, and the truck has 33,500 Miles as it sits so it’s under warranty. I doubt that it being that large of a time interval that the exhaust has anything to do with it, but I wanted to see if anyone else was experiencing similar issues. Any help is appreciated.

P0138

P013A

P013C

P0158

 

 

[Colossus]

nope, haven't seen any posts on here related to that.  get it in to have it fixed. 

[Chevrojayy97]

Yep, took it in and they claimed the aftermarket exhaust changed the flow around the 02 sensor, but replaced it under warranty. I call bs, but at least they didn’t argue.