Quote Originally Posted by Daox View Post
I think using the old sensor is fine. Whatever it is, it needs to have the relearn procedure done if you keep getting the P0300 code. I reset mine a bunch of times while trying to fix it and it always came back.
If he's not also getting a P1336, I think it is unlikely that a relearn procedure will help. P0300 just indicates a misfire...which sound like it it a pretty obvious misfire from his description.