2012 Audi A6 - Code help - What's next?

Code 2950 Turbo under boost
\Valve cover leak

P2950 Possible Causes

  • Accelerator Pedal Position Sensor has failed
  • Air leaks after the MAF sensor, or leaks in the PCV system
  • Fuel injector(s) restricted or not supplying enough fuel
  • Throttle position sensor wiring may have shorted
  • TP sensor signal circuit is shorted to ground

I don’t understand anything else you posted. Explain further