Saturn L300 Computer Read Codes

I Found A Used Ecm From A 2003 Same Make, Model. I Was Told That It Would Not Communicate With The Scanner To Be Programmed. I Was Also Told...

What Do These Codes Mean Should I Just Get Rid Of The Car

I Have A 2002 L-300 Which Sent A Check Engine Light. I Went To The Dealer And They Found A Code That Indicated A Bad Thermostat. Not Willing...