upon leaving home depot. I saw my steady check engine lite on. I looked under the hood,all looked well. Got home cycled the key three times,& found a P2121 code,further research said is a pedal position sensor performance/rationality. Went to my dealer ,who said he can't touch me for 2 weeks. Engine check lit has gone out,truck runs great!Has anyone had this code?Any thoughts on the wisdom of my doing a 600 mile camping trip? Thank's ,Pat