I was washing the underbelly of my 2000 Xterra to remove mud. I only used a hose pipe and NOT a power washer. Now, the SERVIC ENGINE SOON light is on and the car is running rough. When in drive and stopped the RMP's are just over .500 and in neutral it is at 1000. What could this be? What can I do MYSELF to get this fixed?
Thanks for ANY help.
Ashley