Just had my car hooked up and found these codes. What exactly do they mean? especially the one about the power supply?

18010 - Power Supply Terminal 30: Voltage too Low
P1602 - 35-10 - - - Intermittent
00670 - Throttle Position Sensor (G127)
06-10 - Signal to High - Intermittent
16507 - Throttle Position Sensor (G69): Signal too High
P0123 - 35-10 - - - Intermittent
16502 - Engine Coolant Temp. Sensor (G62): Signal too High
P0118 - 35-10 - - - Intermittent
01262 - Solenoid Valve for Boost Pressure Control (N75)
26-10 - Output Open - Intermittent
The car seems to be misfiring. The ride is very rough and I can even smell gas while its idling. Any help would be much appreciated.

Have you reset all the codes to see which ones come back?

yes i have and so far none have come back. problem with the car though is that there's no spark coming from the no.2 plug. i checked and there's a current in all the cables, tried switching around coil packs, changed all plugs and still same problem. what else could this be?