Ok P2269 Indicates an issue with the turbocharger wastegate performance:
Indicates the boost pressure is not reaching a calibrated goal by more than a calibrated threshold
Possible causes: CAC System Leaks, Exhaust or intake air system leaks, EP Sensor Biased,Restriction in Exhaust Pressure sensor or tube. Turbo vanes sticking.If egr codes are stored look into the egr function
P0703 Brake Switch Input B Circuit Fault:
The brake pressure applied switch (BPA) provides a backup signal for the brake pedal position switch BPP.If the BPP signal is lost it provides the brakes applied signal to deactivate the cruise control system.
Causes: Open or short in the BPA Circuit,damage in the module to the bpa circuit.damaged brake pedal switch,misadjusted switch. Check proper operation of the stop lamps.
U0073 Control Module Communication Bus A Off
Open Circuit Between the PCM and the datalink connector for the CAN Network
Possibly due to the use of your tuner package