audi a4 bpw warning light

hello please help have had emissions warning light and intermiitent dpf regen i have following fault code should i replace sensor g450 and where is it located many thanks jimbo 001137 - Exhaust Pressure Sensor 1 (G450): Implausible Signal
P0471 - 000 - -
Freeze Frame:
Fault Status: 01110000
Fault Priority: 2
Fault Frequency: 2
Time Indication: 0
Freeze Frame:
RPM: 0 /min
Speed: 0.0 km/h
(no units): 20.40
(no units): 15.30
Mass Flow: 5.69 g/s
Temperature: 222.0°C
Temperature: 16.2°C

many thanks mate seems striaght forward enought,have done some reading and its mentioned the sensor needs adapting after fitting does this mean a forced regen thanks again

All fitted mate took for a spin so far so good thanks for your help