Just washed the engine on my 95 FZJ80. "Not high pressure", I do this 2-3 times a year to keep it clean. engine was warm but not hot when I washed it. Started a little rough so I let it run while I dried off the LC. Shut it down after letting it run for around 5 minutes (it was running smooth). Let it sit for 3-4 minutes and when I started it up to drive the 5 miles home it ran smooth but the "Check Engine Light" stayed on. When I got home I let it sit for around another 5 minutes and when I started it up again the light still stayed on. What did I mess up washing the engine? Any suggestions???