I got a P0303 code a couple weeks ago. @62k, I was planning on replacing plugs/coils anyway since I hadn't done them since about 25k. So, did that, had new plugs and coils, CEL went off, my mechanic said it was #3. So, now 2 1/2 weeks later, P0303 again. Car seems to run fine, no hesitation, fuel mpg is amazing- no odd sounds. Anyone have any ideas?