P0235 Boost Sensor Circuit


New Member
I have an 2009 A6 C6 3.0 TDI. I have an odd issue when I first set off in the morning, this isn't weather dependant and generally only happens when I head up a hill immediately after pulling out of my drive.

The glow plug coil flashes and the fault code I am getting is: P0235 Turbo/Super Charger Boost Sensor Circuit. However, the interesting bit is that when I throttle the car and speed up the hill it doesn't happen, nor does it happen if my Auto Box is in Sport mode. Any ideas? ALSO, can anyone tell me the exact location of the N75 Valve on my model?