A6 3l tdi v6, DPF pressure diff sensor

   #1  
W

WillemT

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Hope someone can help.

Checked out a friends Audi A6 3l tdi. He has a dpf problem on the car.
Doing a scan showed there was a fault code on the engine regarding the differential pressure sensor.

Tried to do a forced regen on the dpf, thinking the sensor error might have been a once off with the fault frequency 1 and the sensor giving a reading at the time.
So the regen started and after a few seconds aborted because of safety measures or something.

The measured soot level went up from someting in the 20 to over 60 after the partial regen. It then adjusted the calculated soot level to kind of fit the measured one.

My thoughts are that the sensor is maybe giving the wrong values and thus now have a too high soot level registered to want to do a regen.

Plans are to first replace the sensor. 059 906 051 A
Do I need to reset the learned values somewhere or can I just replace the sensor? And will it then when having hopefully different and correct readings adjust the measured and calculated soot values in order to do a regen again?

Will try and place the scans below
Sorry for the scan to be posted like this. Would appreciate advise on how to do the window posts for the scans.


First scan

Code: 
Monday,03,September,2018,20:11:37:02456
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 18.2.1.2 (x64)  HEX-NET CB: 0.4411.4
Data version: 20180518 DS287.1
www.Ross-Tech.com


VIN: WAUZZZ4G0BN023614   License Plate: CF 214510
Mileage: 127357km-79135mi   Repair Order: 



--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Chassis Type: 4G-AU57 (4G0)
Scan: 01 02 03 05 08 09 10 15 16 17 19 20 22 28 34 36 3B 42 44 46
          52 53 55 56 5F 62 6C 72 82

VIN: WAUZZZ4G0BN023614   Mileage: 127357km-79135miles

01-Engine -- Status: Malfunction 0010
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
05-Acc/Start Auth. -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
10-Park/Steer Assist -- Status: OK 0000
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
20-High Beam Assist. -- Status: OK 0000
22-AWD -- Status: OK 0000
28-HVAC, Rear -- Status: Malfunction 0010
34-Level Control -- Status: Malfunction 0010
36-Seat Mem. Drvr -- Status: OK 0000
3B-Sensor Elect. -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: Malfunction 0010
52-Door Elect, Pass. -- Status: OK 0000
53-Parking Brake -- Status: OK 0000
55-Headlight Range -- Status: OK 0000
56-Radio -- Status: OK 0000
5F-Information Electr. -- Status: OK 0000
62-Door, Rear Left -- Status: OK 0000
6C-Back-up Cam. -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
82-Heads Up Display -- Status: OK 0000
-------------------------------------------------------------------------------
Address 01: Engine (J623-CDUC)       Labels:. 059-907-401-V2.clb
   Part No SW: 4G0 907 401 F    HW: 4G0 907 401 
   Component: 3.0TDI EDC17  H37 0003  
   Revision: 53H37---    
   Coding: 0A254012052601020000
   Shop #: WSC 02311 785 00200
   ASAM Dataset: EV_ECM30TDI0114G0907401F 001003
   ROD: EV_ECM30TDI0114G0907401F.rod
   VCID: A6009880D9EE1574FD-80F2

2 Faults Found:
5162 - Diesel Particle Filter; Differential Pressure Sensor 
          P2453 00 [237] - Implausible Signal
          MIL ON - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Mileage: 125119 km
                    Date: 2018.07.13
                    Time: 14:25:04

                    Engine speed: 0.00 /min
                    Normed load value: 0.0 %
                    Vehicle speed: 0 km/h
                    Coolant temperature: 34 °C
                    Intake air temperature: 15 °C
                    Ambient air pressure: 1000 mbar
                    Voltage terminal 30: 12.100 V
                    Unlearning counter according OBD: 40
                    Sensor for particle filter differential press: raw value: 235 hPa
                    Particle filter: difference pressure: 206 hPa
                    Particle filter: offset for differential press.: 29 hPa
                    Particle filter: differential pressure: dynamic offset: 0 hPa
                    Outside air temperature: 13.0 °C
                    Particle filter: soot mass measured: 23.24 g
                    Particle filter: soot mass calculated: 23.26 g

5618 - Engine Off Timer Performance 
          P150A 00 [096] - -
          Intermittent - Not Confirmed - Tested Since Memory Clear

Readiness: 1 1 0 0 0


Second Scan

Code: 
Monday,03,September,2018,21:21:31:02456
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 18.2.1.2 (x64)  HEX-NET CB: 0.4411.4
Data version: 20180518 DS287.1
www.Ross-Tech.com


VIN: WAUZZZ4G0BN023614   License Plate: CF 210514 - 2
Mileage: 127362km-79139mi   Repair Order: 



--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Chassis Type: 4G-AU57 (4G0)
Scan: 01 02 03 05 08 09 10 15 16 17 19 20 22 28 34 36 3B 42 44 46
          52 53 55 56 5F 62 6C 72 82

VIN: WAUZZZ4G0BN023614   Mileage: 127362km-79139miles

01-Engine -- Status: Malfunction 0010
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
05-Acc/Start Auth. -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
10-Park/Steer Assist -- Status: OK 0000
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
20-High Beam Assist. -- Status: OK 0000
22-AWD -- Status: OK 0000
28-HVAC, Rear -- Status: Malfunction 0010
34-Level Control -- Status: OK 0000
36-Seat Mem. Drvr -- Status: OK 0000
3B-Sensor Elect. -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: Malfunction 0010
52-Door Elect, Pass. -- Status: OK 0000
53-Parking Brake -- Status: OK 0000
55-Headlight Range -- Status: OK 0000
56-Radio -- Status: OK 0000
5F-Information Electr. -- Status: OK 0000
62-Door, Rear Left -- Status: OK 0000
6C-Back-up Cam. -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
82-Heads Up Display -- Status: OK 0000
-------------------------------------------------------------------------------
Address 01: Engine (J623-CDUC)       Labels:. 059-907-401-V2.clb
   Part No SW: 4G0 907 401 F    HW: 4G0 907 401 
   Component: 3.0TDI EDC17  H37 0003  
   Revision: 53H37---    
   Coding: 0A254012052601020000
   Shop #: WSC 02311 785 00200
   ASAM Dataset: EV_ECM30TDI0114G0907401F 001003
   ROD: EV_ECM30TDI0114G0907401F.rod
   VCID: A6009880D9EE1574FD-80F2

1 Fault Found:
5162 - Diesel Particle Filter; Differential Pressure Sensor 
          P2453 00 [229] - Implausible Signal
          MIL ON - Not Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Mileage: 127362 km
                    Date: 2018.09.03
                    Time: 21:14:05

                    Engine speed: 0.00 /min
                    Normed load value: 0.0 %
                    Vehicle speed: 0 km/h
                    Coolant temperature: 89 °C
                    Intake air temperature: 37 °C
                    Ambient air pressure: 990 mbar
                    Voltage terminal 30: 11.900 V
                    Unlearning counter according OBD: 40
                    Sensor for particle filter differential press: raw value: 213 hPa
                    Particle filter: difference pressure: 183 hPa
                    Particle filter: offset for differential press.: 29 hPa
                    Particle filter: differential pressure: dynamic offset: 0 hPa
                    Outside air temperature: 17.5 °C
                    Particle filter: soot mass measured: 61.60 g
                    Particle filter: soot mass calculated: 61.92 g

Readiness: 0 0 0 0 1 

-------------------------------------------------------------------------------
 
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   #2  
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RyMar

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See if this will work?

Exhaust Gas Differential Pressure Sensor (G450) Adaptation
The Exhaust Gas Differential Pressure Sensor (G450) Adaptation is performed based on the EDC Protocol which is shown in the upper left corner of the Open Controller screen

CAN Protocol (G450) procedure
Instructions should be populated in a pop-up balloon when connected to the controller in question with VCDS.

Key ON, Engine OFF
[Coding-2] or [Login-II] button
Enter the code shown in the VCDS pop-up balloon
[Do It!]
Switch Ignition OFF for 30 seconds
After the key is cycled back on the adaptation should be completed. If it is not completed, proceed with the next steps:

These steps must be repeated 5 times.

Ignition ON
Wait 5 seconds
Ignition OFF
Wait 40 seconds
Repeat 4 more times
Note: If a code is NOT shown in the VCDS pop-up balloon registered customers can Join our Forum -or- send the complete Auto-Scan via email with the recent repair history including the part number of the original/removed sensor and the new replacement sensor.

UDS Protocol (G450) procedure
Key ON, Engine OFF
[Basic Settings]
Select Adaptation of diff. pressure sensor particulate filter
[Go!] to activate the Basic Setting.
After the result of Finished Correctly appears click [Stop]
Select Resetting of learned values of difference pressure sensor
[Go!] to activate the Basic Setting.
After the result of Finished Correctly appears click [Stop]
[Done, Go Back]
 
   #3  
Uwe

Uwe

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This ECU uses the UDS protocol, so you're going to need the last section.

Basic Setting:
IDE00468 -- Resetting of learned values of difference pressure sensor

-Uwe-
 
   #4  
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WillemT

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Hi RyMar, Uwe

Thanks for the advice.
Sensor is replaced and it solved the implausible signal fault. So just need to reset the learned values.
Say the dpf needs a regen, wil the resetting of the learned values then make the computer believe that the dpf is clean?
And if so how do you then get it cleaned out? Take the car for a hard drive up a steep mountain pass should help I guess?
 
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