FORD ESCORT CHECK ENGINE LIGHT

I C Hanged My Thermostat And Now My Service Engine Light Is On, Why

I Have A 96 Ford Escort Lx, 1.9 Engine, 5 Speed, 155,000 Miles. The Engine Light Came On And Wont Go Away. Checking The Codes, It Gives...

My Question Is About My 2001 Ford Escort. After I Put New Spark Plugs And Wires On The Service Engine Soon Light Came On About A Week Later...