A4 B5 '01 multiple sensor failure
 

So I'm driving home from work and five minutes into the drive I come to a stop... 1st and second pull flawlessly, then a pop! And now backfires on every shift along with a top fuel dragsters idle... I checked engine status with torque and noticed I wasn't getting readings from multiple sensors.. no vacuum or boost, no afr metered, both o2 sensors flat.. no fuel trim...

Here are the dtc:



P0444: Evaporative Emission Control System Purge Control Valve Circuit Open
P0037: HO2S Heater Control Circuit Low (Bank 1 Sensor 2)
P0418: Unknown code - More information may be available on the web
P0412: Secondary Air Injection System Switching Valve "A" Circuit
P1289: [BMW] Switching Solenoid for Air Assisted Injection Valves Bank 2 Control Circuit Signal High
[Ford] Cylinder Head Temperature Sensor Signal Greater Than Self-Test Range
[Seat/Audi/Volkswagen] Turbocharger bypass valve short to ground

P1473: [BMW] Diagnostic Module Tank leakage (DM-TL) Pump Current Plausibility
[Ford] Fan Secondary High with Fans Off
[Mitsubishi] DPF differential PRS.sensor high
[Seat/Audi/Volkswagen] EVAP Emission Contr.LDP Circ Open Circ.

P0102: Mass or Volume Air Flow Circuit Low Input
P0031: HO2S Heater Control Circuit Low (Bank 1 Sensor 1)
P0136: O2 Sensor Circuit Malfunction (Bank 1 Sensor 2)



If anyone has any ideas::: :) help would be greatly appreciated!