It’s time to replace O2 sensors. I’m getting a P0154 code and know it’s time. I’ve seen recommendations for sensors from Amazon. The only ones I can find just have pigtails, but no connectors. Are they the ones people are using? Should I trust the ones sourced from Amazon or go to Atlantic British? Thanks.

Shop at rock auto they have all brands and with connectors cheaper than anyone else
I just bought 4

Also don't be fooled by that code
I would smoke test your intake and exhaust for any leaks
and also check your fuel purge valve

don't be like me and spend money to fix nothing without doing cheap checks first

Driving just now I had a period of bad misfires. The code was 1300, multiple cat destroying misfires. Then it corrected and drove just fine. I have new plug wires, fairly new coil packs. Tell me about the fuel purge valve.

Do a smoke test and make sure you don't have vacuum leaks
then your fuel purge line connects to your intake by the throttle body you can take that hose out and plug that fitting with a cap then drive and see if all your problems go away

Also check your oil separator better yet research the mod to install the fram fv308 pcv valve supper easy and worth it