I have a 1992 YJ and the other day I decided it was time to give the engine a bath. I used my pressure washer. The engine is clean now and now my engine light came on. After I washed the engine I started it and no engine light came on. While starting it up again 20 minutes later the engine light came on. It has been two days now and the light is still on. I have a code reader but I was told that the connections are diffident in the 92s. Any suggestions before I have to bring it in to the shop.