Audi A6, 2.0 TDI, 2016 - P2002 (19226) fault code

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Andrada

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Good evening!
I have an Audi A6 2.0 TDI 2016 and the Check Engine is light on for a few months. I put the OBD scanner and it discovered a fault code and it is 19226-Particulate Trap Bank 1; P2002 00 [237] - Efficiency Below Thereshold. I deleted the error a few times, but it kept popping up. The mechanics told me that the DPF is full of soot and it should be cleaned. The DPF was cleaned and after a few days, the Check Engine is light on again. I put the OBD scanner to see what is the fault code and it is the same. I read that this fault code would indicate a problem on the G450 exhaust pressure sensor or EGR cooler. But what could be ?

This is my diagnosis:

19226 - Particulate Trap Bank 1
P2002 00 [237] - Efficiency Below Thereshold
MIL ON - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 190577 km
Date: 2020.08.19
Time: 16:40:16

Engine speed: 1732.00 min
Normed load value: 39.2 %
Vehicle speed: 33 km/h
Coolant temperature: 87 °C
Intake air temperature: 82 °C
Ambient air pressure: 980 mbar
Voltage terminal 30: 14.100 V
Unlearning counter according OBD: 40
Exhaust mass flow of low-pressure EGR: calculated: 4.526
Differential pressure ratio: low-pressure EGR: 24.7 kg/h
Exh. recircul. 2: differential pres. sensor 1 bank 1: adap. value: 34.8 hPa
Exhaust recirculat. 2: different. press. sens. 1 bank 1: raw value: 36.7 hPa
Exh. recircul. valve 1 bank 1: pos. feedback - Act. value: 78.94 %
Exhaust recirc. valve 2 bank 1: posit. feedback - Act. value: 41.88 %
Exh. gas recirc. 2: diff. press. sensor 1 bank 1: dyn. value: 32.8 hPa
 
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