The car seems to be running fine except for the slipping clutch, but my check engine light came on two days ago with the fallowing codes;
P0645-A/C CLUTCH RELAY CIRCUIT
P0480-COOLING FAN 1 CONTROL CIRCUIT
P0138-O2 SENSOR ? VOLTAGE HIGH
P0633-SKIM KEY NOT PROGRAMMED IN PCM
P1105-TIP SENSOR SOLENOID CIRCUIT
I am not concerned about P0633, I know I can get that taken care of by having the dealer program the skim onto the s3 pcm but where the hell did these other codes come from? The car seems to be running fine, but can I get some advise on how to fix the other four codes..

Thanks!
P0645-A/C CLUTCH RELAY CIRCUIT
P0480-COOLING FAN 1 CONTROL CIRCUIT
P0138-O2 SENSOR ? VOLTAGE HIGH
P1105-TIP SENSOR SOLENOID CIRCUIT