My 2000 SE misfired the whole way home last night. and the engine check light came on. Dealer wants $83 just to diagnose....anyway I can read the trouble code and determine if its a bad coil or sensor somewhere??? Car is running fine today but light is still on...

 

take it to autozone

 

I had a similar problem. The code was P1320, ignition signal, basically one or more coils was dead. Turns out the coils made for the 2k were flawed in design, so I replaced all six. Its around $70 per coil including tax, but you can install them yourself, prolly take about an hour.