audi sq5 p0544 code sensor location

Hi I've got a sq5 3.0tdi it's just gone into limp mode engine management and and flashing swirly yellow light the obd code is p0544 exhaust temperature sensor 1 I've a audi diesel tuner and he told me its pre turbo but no hope in finding it so far. But when looking at single turbo vw 3.0tdi engine I can see info for it located after 1st small cat on link pipe upper side in bulkhead. I can also see one behind the turbos on the sq5 so not sure if this is it can anyone tell me its correct location on the sq5?
Thanks Jason