P015B & P015D Codes w/ Stock Headers

[Junior]

Got a CEL yesterday and the associated codes were P015B & P015D (O2 Sensor Delayed Response - Lean to Rich) In my research, I noticed a lot of people getting this code after installing headers. I however have stock headers. I've only installed a CAI intake and axle back muffler deletes, though over 2 years ago. Only have about 40k miles, so it's hard to imagine a sensor going bad, but I'm leaning towards that direction. Any other thoughts? Was told to run seafoam through the gas tank, but I don't see the relevance. I'm guessing this would not be covered under powertrain warranty, so I'm looking to do as much DIY as I can...

[JerTM]

It may be covered under the emissions or powertrain. I would call the dealership and ask the service adviser if the o2 sensors are covered under either, never hurts to ask.

[Junior]

So tried the seafoam and 20ish miles later the CEL cleared. Buddy of mine asked if I got gas at the new Citgo down the road. It just so happens I did, the day before I got the CEL. Apparently that location (it used to be a Quick Mart station) was notorious for bad gas that antagonizes customer's emissions. I had never heard such a thing. Weird how the station changed hands (and presumably fuel resources) but still allegedly affects people's emissions. Anyone have a similar experience?

[JerTM]

Originally Posted by Junior

So tried the seafoam and 20ish miles later the CEL cleared. Buddy of mine asked if I got gas at the new Citgo down the road. It just so happens I did, the day before I got the CEL. Apparently that location (it used to be a Quick Mart station) was notorious for bad gas that antagonizes customer's emissions. I had never heard such a thing. Weird how the station changed hands (and presumably fuel resources) but still allegedly affects people's emissions. Anyone have a similar experience?

If they truly do use a unique new fuel source from the original, then the only common denominator would be the tanks in the ground. It's very unlikely they changed those out. But yes, over the years I have run into bad gas situations. There is one particular gas station in town that I won't even put in my lawnmower. I have repaired several customers vehicles from that one gas station. It's bad when I change a diesel fuel filter and literally dump sand out of their old one.

[camguynj]

Originally Posted by Junior

So tried the seafoam and 20ish miles later the CEL cleared. Buddy of mine asked if I got gas at the new Citgo down the road. It just so happens I did, the day before I got the CEL. Apparently that location (it used to be a Quick Mart station) was notorious for bad gas that antagonizes customer's emissions. I had never heard such a thing. Weird how the station changed hands (and presumably fuel resources) but still allegedly affects people's emissions. Anyone have a similar experience?

Same here, got both codes simultaneously for first time ever (38k mi) 1hr after gassing up on a very low tank at usual station (always 93 octane). Ran thru that gas then gased up at another station. Drove for 1/2hr about 20 miles but light didn't go out, so I cleared the codes drove for another 1/2hr 30 miles ... no light I then checked the readiness monitors and all was good!

Just to add, I have shortys hdrs, PTB, CAI, HF cats and VTC all of which have been on the car for 4+ years