Hi everyone , I'm a noob to owning a ram . We just bought out 2004 ram with the 5.7 hemi . When I bought it the owner said it takes copper plugs and was coming up on needing to be changed . It drove fine Monday but Tuesday on my way home from work it threw the check engine light . I went by autozone and it pulled 3 codes. P2099, p0159, p0157 all relating to the bank 2 sensor 2 , so I buy one from autozone , it was a bosch and I install it , clear the code by removing fuse 23 and off to work I go today , on the way to work it's fine bug on my way home here comes my little yellow engine light friend so I go back to autozone and this time it's code p0430. I bought 16 champion plugs because I know he said it was coming up on needing done but also because all these codes say it could be a misfire . Can old plugs cause a misfire ? , what else should I check etc ? . Any help or advice would be appreciated