2001 toyota camry code- p0301

Hello,
2001 toyota camry 4 cyl with 108,000 miles. Check engine light on, code p0301(cyl. 1 misfire). Dealer found no problem, moved spark plugs around and reset code. Since that time, code has come back and been reset 3 times, always p0301. Car runs perfectly.
Any ideas/help.
Thank you,
Joe

It's a very generic code so if you check under any misfire dtc on any type of car on here you'll get hundreds of ideas. One of them will be the successful repair for your car. The info is all over this site. Utilize it. Pretty sure it's not the plugs but a new set of the correct ones won't be a bad idea and if it's a coil on plug system switch the coils to another cylinder. It sounds like the dealer wasn't given enough authorized diagnostic time to test anything or they should have found it.