New to the forum I have 07 GTP with 3.6 and getting Check Engine code of P2A04 - O2 Sensor Circuit Range/Performance Bank 2 Sensor 2. It stays on for a while then goes off for a while. My assumption here is it's time to replace the bad sensor. When looking for replacements everything is listed as 'right' or 'left'. I know Sensor 2 is downstream after the cat, but how do I determine if bank 2 is right or left? I've been to two different auto parts stores and got two different answers, so now needless to say I'm confused which one to get.