[Biturbos4] HELP!!! Troubleshooting DTCs w/ EPC light

[Adam Jansen]

As I was driving over the Cascades to visit family for the holiday, the EPC 
light comes on the the power cuts out (not fun coming up Snoqualmie Pass!)

I dont have my Bently or family albumn with me, but luckily I did have the 
laptop and pulled these codes:

17526 - Oxygen (Lambda) Sensor Heating: B1 S2: Open Circuit
            P1118 - 35-00 - -
17522 - Oxygen (Lambda) Sensor: B1 S2: Internal Resistance too High
            P1114 - 35-00 - -
16524 - Oxygen (Lambda) Sensor B1 S2: No Activity
            P0140 - 35-00 - -
17866 - Exhaust Gas Temp Sensor 2 (G236): Short to Ground
            P1458 - 35-10 - - - Intermittent
17536 - Fuel Trim: Bank 1 (Mult): System too Lean
            P1128 - 35-00 - -
17538 - Fuel Trim: Bank 2 (Mult): System too Lean
            P1130 - 35-00 - -
17579 - Angle Sensor 2 for Throttle Actuator (G188) Implausible Signal
            P1171 - 35-10 - - - Intermittent

I am replacing the O2 sensor in the morning (driver's side rear correct?) 
but I am worried about the Throttle Actuator and the System running lean!

I stopped when the light came on and then started off again as the light 
turned off... it seems that the EPC light with the above codes (expect the 
O2 sensors readings) come on only after the engine has been running on the 
highway for 30-45 mins, which just adds to the frustration of trying to fix 
it!

ANY help would be appreciated!

Thanks
Adam
00 S4
Spokane, WA but current stuck in Olympia and hesitant to crawl over the 
cascades under limited power