about three months ago the engine light came on .code#(p0301)

I've made appointment w/auto shop to check injectors&compresson,I've done what i know to do.Peniston Automotive think he knows what it is,so monday,28th day of February i'm taking it in.

The shop seem's like they might be guesting,Steve,sprayed something on the wires&coil pack,checking for misfire&leaks,(Question)will the o2sensor cause this problem?

Still having the same problem;after many different tests,even checked the exhaust.(code p0301)on March,14 2011 in shop,same problem.