car problems, please help!!
 

Ok, my o2 sensor has been jacked up for a while, so thats no.1
heres a complete list and details for whats going on.

Make/model: Mitsubishi Lancer ES
year: 2003

Problems:

1. Power Locks: just went out. I dont know what I did, but they dont work now.

2. A/C: went out at the same time my locks went out. Again, not sure what I did.

3. Diagnostic scan: CAN NOT GET A DIAGNOSTIC SCAN READ FOR MY CHECK ENGINE LIGHT.

My friend says its a relay problem, Ive checked all fuses and they are all good. If anyone can tell me what they think I would appreciate it. Im trying to sell this car and cant with these problems. Thanks. email me if you want @ greentops2for5@yahoo.com