Audi A5 3.0TDI Intermittant DPF fault

   #1  

M_Ayre

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Hi,

I'm new to Ross-Tech and this is my first post. I've tried to be as detailed as possible but if I've missed something please let me know. I'm having issues with the DPF on my 2008 Audi A5 3.0 TDI. The issue has been ongoing intermittently for the year and a half that I've owned the car. It's been to a couple of different Audi specialists and the issue is still present, although can go 2 -3 months with out presenting itself. The two DTC's which usually present themselves are: 5188 - Diesel Particulate Filter (Bank 1) P242F 00 [032] - Restricted/Clogged and 5189 - Particulate Trap Bank 1 P2002 00 [032] - Efficiency Below Threshold. It does occasionally present the error 5162 - Exhaust Pressure Sensor 1 (G450)P0471 00 [229] - Implausible Signal although has not yet done this since the latest pressure sensor change.

The EGR valve has been replaced as after the first pressure sensor change the car popped up with an EGR fault . The car's software has all been updated. The car has had the G450 Pressure sensor replaced three times, once before the EGR valve and twice after at different garages.

The first two codes popped up again today whilst in stuck in town traffic. The car had just completed a 20 mile run at 60mph plus and then spent around ten minutes in queued traffic The DPF was not due a regeneration (does it around every 200 miles since software update) as the car had only covered just over 50 miles since the last one completed. The DPF light lit up, stayed on for around 30 seconds, then went out and got the flashing glowplug and limp mode. After leaving the car switched off for around 45 minutes, switched back on and no DPF light or flashing glowplug with full power restored. The car has done this previously whilst stuck in traffic, once after around 100 miles on a motorway.

The freeze frame data show the Distance since regeneration at 0 miles however when going into advance measuring the data shows 54 miles since last regeneration. Clearly something is not right. With the engine off the car showed the Calculated soot level at 12.56g and measured at 0.72g. I then started the engine monitoring these fields and the measured soot levels whilst at idle increased to 24.19g after around 60 seconds before dropping back down to 3.16g after 10 minutes of sitting at idle. Calculated increased slightly to 12.65g. No error codes appeared during this 10 minutes sat at idle.

The garages have checked all connections, wiring, pressure pipe and can find no issues. Does anyone have any ideas on what could be causing this error?

Many Thanks
Michael


Code:
Wednesday,01,August,2018,18:35:03:27910
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 18.2.1.2 (x64)  HEX-V2 CB: 0.4411.4
Data version: 20180518 DS287.1
www.Ross-Tech.com


VIN: WAUZZZ8T88A021410   License Plate: XXXXXX
Mileage: 150220km-93342mi   Repair Order: 0108181834


                Address 01: Engine  (8K0 907 401 F)

18:34:46
  ENG107988   Distance since last regeneration 87663 m
  ENG106427   Exhaust gas temp.after pre-catalyst 140.0 °C
  ENG106429   Exhaust gas temp.bef.turbocharger 122.4 °C
  ENG106430   Exhaust gas temperature before particulate filter 131.2 °C
  ENG105211   Exhaust gas vol.flow particulate filter 0.0 m³/h
  ENG107984   Oil ash 0.26 l
  ENG107975   Soot mass calculated 12.56 g
  ENG107974   Soot mass measured 0.72 g



Code:
Wednesday,01,August,2018,18:31:35:27910
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 18.2.1.2 (x64)  HEX-V2 CB: 0.4411.4
Data version: 20180518 DS287.1
www.Ross-Tech.com


VIN: WAUZZZ8T88A021410   License Plate: xxxxxx
Mileage: 150220km-93342mi   Repair Order: 0108181831



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


Chassis Type: 8T-AU48 (8T0)
Scan: 01 03 05 06 07 08 09 0E 10 15 16 17 19 36 37 42 46 47 52 53
          55 56 6C 77

VIN: WAUZZZ8T88A021410   Mileage: 150220km-93342miles

01-Engine -- Status: Malfunction 0010
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
05-Acc/Start Auth. -- Status: OK 0000
06-Seat Mem. Pass -- Status: Malfunction 0010
07-Control Head -- Status: OK 0000
08-Auto HVAC -- Status: Malfunction 0010
09-Cent. Elect. -- Status: OK 0000
0E-Media Player 1 -- 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
36-Seat Mem. Drvr -- Status: OK 0000
37-Navigation -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
47-Sound System -- 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
6C-Back-up Cam. -- Status: OK 0000
77-Telephone -- Status: OK 0000
-------------------------------------------------------------------------------
Address 01: Engine (J623-CAPA)       Labels:| 059-907-401-V1.clb
   Part No SW: 8K0 907 401 F    HW: 8K0 907 401 
   Component: 3.0TDI EDC17  H01 0008  
   Revision: --H01---    
   Coding: 0114002C180F0118
   Shop #: WSC 74565 000 1048576
   ASAM Dataset: EV_ECM30LTDIA5 A02008
   ROD: EV_ECM30LTDIA5_A02.rod
   VCID: 2E05F3F630919517D3B-807A

3 Faults Found:
5188 - Diesel Particulate Filter (Bank 1) 
          P242F 00 [032] - Restricted/Clogged
          Intermittent - Not Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Mileage: 150221 km
                    Date: 2018.08.01
                    Time: 17:13:10

                    Engine speed: 809.50 /min
                    Normed load value: 25.5 %
                    Vehicle speed: 0 km/h
                    Coolant temperature: 84 °C
                    Intake air temperature: 38 °C
                    Ambient air pressure: 1010 mbar
                    Voltage terminal 30: 14.320 V
                    Unlearning counter according OBD: 40
                    Engine speed: 804.0 /min
                    Vehicle speed: 0.00 km/h
                    Field regeneration status-Bits 0-7: 00000000 
                    Field regeneration status-Bits 0-7: 00101110 
                    Field regeneration status-Bits 0-7: 00000000 
                    Field regeneration status-Bits 0-7: 00000000 
                    Particul.filter diff.pressure: 8 hPa
                    Exh t Adap TP Flt Us: -270.0 °C
                    Exhaust gas vol.flow particulate filter: 66.2 m³/h
                    Distance since last regeneration: 0 m

5417 - Glowplug for Cylinder 5 (Q15) 
          P161E 00 [109] - Open Circuit
          Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Mileage: 149595 km
                    Date: 2018.07.23
                    Time: 08:44:50

                    Engine speed: 1165.00 /min
                    Normed load value: 64.7 %
                    Vehicle speed: 0 km/h
                    Coolant temperature: 24 °C
                    Intake air temperature: 23 °C
                    Ambient air pressure: 1010 mbar
                    Voltage terminal 30: 11.640 V
                    Unlearning counter according OBD: 40
                    Engine speed: 1165.0 /min
                    Vehicle speed: 0.00 km/h
                    Vehicle voltage terminal 30: 11660 mV
                    Coolant temperature: 24.7 °C
                    Preheating system status-Bits 0-7: 00000000 
                    Preheating system status-Bits 0-7: 10110000 
                    Glw Plg r LVS Ps: 21.65 %
                    Intake air temperature: 23.5 °C

5189 - Particulate Trap Bank 1 
          P2002 00 [032] - Efficiency Below Threshold
          Intermittent - Not Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Mileage: 150221 km
                    Date: 2018.08.01
                    Time: 17:13:10

                    Engine speed: 809.50 /min
                    Normed load value: 25.5 %
                    Vehicle speed: 0 km/h
                    Coolant temperature: 84 °C
                    Intake air temperature: 38 °C
                    Ambient air pressure: 1010 mbar
                    Voltage terminal 30: 14.320 V
                    Unlearning counter according OBD: 40
                    Engine speed: 804.0 /min
                    Vehicle speed: 0.00 km/h
                    Field regeneration status-Bits 0-7: 00000000 
                    Field regeneration status-Bits 0-7: 00101110 
                    Field regeneration status-Bits 0-7: 00000000 
                    Field regeneration status-Bits 0-7: 00000000 
                    Particul.filter diff.pressure: 8 hPa
                    Exh t Adap TP Flt Us: -270.0 °C
                    Exhaust gas vol.flow particulate filter: 66.2 m³/h
                    Distance since last regeneration: 0 m

Readiness: 0 0 0 0 0 

-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104)       Labels:. 8K0-907-379-V1.clb
   Part No SW: 8K0 907 379 N    HW: 8K0 907 379 N
   Component: ESP8 quattro  H03 0210  
   Revision: --------    Serial number: --------------
   Coding: 1B4500
   Shop #: WSC 06325 000 00000
   VCID: 44D1B15E8E9D0F4715F-8010

No fault code found.

-------------------------------------------------------------------------------
Address 05: Acc/Start Auth. (J393)       Labels:. 8K0-907-064-05.clb
   Part No SW: 8K0 907 289 C    HW: 8K0 907 289 C
   Component: BCM2.01       H38 0253  
   Revision: 00003002    
   Coding: 031000
   Shop #: WSC 06325 000 00000
   VCID: 392FD0AAF95F42AF769-806C

   Subsystem 1 - Part No SW: 8T0 959 754 D    HW: 8T0 959 754 D
   Component: FBSAUDIB8 IDG  H34 0050 
   Serial number: 0107000147258012    

   Subsystem 2 - Part No SW: 8K0 905 852 C    HW: 8K0 905 852 C
   Component: ELVAUDIB8  H35 0039 
   Serial number: 0207000001350008    

No fault code found.

-------------------------------------------------------------------------------
Address 06: Seat Mem. Pass (J521)       Labels:. 8T0-959-760.clb
   Part No SW: 8T0 959 760 B    HW: 8T0 959 760 B
   Component: MEM-BFS       H09 0043  
   Revision: AA000000    Serial number: 00001001046034
   Coding: 08217025002444111000
   Shop #: WSC 00579 210 91872
   VCID: 42DDB74694890177273-8016

1 Fault Found:
03338 - Force Limit for Fore/Aft Seat Adjustment: Forwards 
            005 - No or Incorrect Basic Setting / Adaptation
             Freeze Frame:
                    Fault Status: 01100101
                    Fault Priority: 3
                    Fault Frequency: 1
                    Reset counter: 196
                    Mileage: 147858 km
                    Time Indication: 0
                    Date: 2018.06.11
                    Time: 17:58:08


-------------------------------------------------------------------------------
Address 07: Control Head        Labels: 8T0-035-7xx-07-H.clb
   Part No SW: 8T0 035 729 F    HW: 4E0 035 729 A
   Component: Interfacebox    H43 4690  
   Revision: 00000000    Serial number: 331KQ077515209
   Coding: 0005002
   Shop #: WSC 06325 000 00000
   VCID: 3C21C9BEFA6D77876DF-8068

   Subsystem 1 - Part No: 8T0 919 609 
   Component: E0380 BedienteilH07 0100

   Subsystem 2 - Serial number: 00000000024033

   Subsystem 3 - Serial number: 0117.10.070000000100010063ÿ

   Subsystem 4 - Serial number: 010063ÿ

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC (J255)       Labels:. 8Tx-820-043-3Z.clb
   Part No SW: 8T2 820 043 N    HW: 8T2 820 043 N
   Component: KLIMA 3 ZONEN H05 0120  
   Revision: D1000000    Serial number: 0107.11.070004
   Coding: 36060000
   Shop #: WSC 06325 000 00000
   VCID: 3D27C4BAED777E8F5A1-8068

2 Faults Found:
01087 - Basic Setting Not Performed 
            005 - No or Incorrect Basic Setting / Adaptation
             Freeze Frame:
                    Fault Status: 01100101
                    Fault Priority: 3
                    Fault Frequency: 1
                    Reset counter: 174
                    Mileage: 147338 km
                    Time Indication: 0
                    Date: 2018.05.25
                    Time: 12:10:22

01274 - Air Flow Flap Positioning Motor (V71) 
            003 - Mechanical Failure - Intermittent
             Freeze Frame:
                    Fault Status: 00100011
                    Fault Priority: 3
                    Fault Frequency: 224
                    Reset counter: 65
                    Mileage: 147340 km
                    Time Indication: 0
                    Date: 2018.05.25
                    Time: 16:37:03

             Freeze Frame:
                    Voltage: 14.50 V
                    Temperature: 14.0°C
                    Temperature: 11.0°C
                    Count: 10681
                    Count: 10904


-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519)       Labels:. 8K0-907-063.clb
   Part No SW: 8K0 907 063 D    HW: 8K0 907 063 D
   Component: BCM1 1.0      H21 0253  
   Revision: 05021001    Serial number: 00000000051818
   Coding: 260050910014AF010009000300005D5D001D038800010141000000
   Shop #: WSC 00385 210 90023
   VCID: 3039ED8E2A2583E7C17-8064

   Subsystem 1 - Part No SW: 8T2 955 119 B    HW: 8J2 955 119   Labels: 1KX-955-119.CLB
   Component: WWS 271007  H11 0040 
   Serial number: SWFBIE 0000205      
   Coding: 00FD11

   Subsystem 2 - Part No SW: 8K0 955 559     HW: 8K0 955 559   Labels: 8K0-955-559.CLB
   Component: RLS  H04 0002 
   Serial number: 10017544            
   Coding: 02532C

   Subsystem 3 - Part No SW: 8K0 941 531 G    HW: 8K0 941 531 G
   Component: E1 - LDS  H07 0070 
   Serial number: 00000000000511070071

No fault code found.

-------------------------------------------------------------------------------
Address 0E: Media Player 1        Labels: 4E0-910-111.lbl
   Part No SW: 8T2 035 110 B    HW: 8T2 035 110 A
   Component: MP3-Changer     H42 0380  
   Revision: 00042002    Serial number: AUZ5ZBG4531892
   Shop #: WSC 00000 000 00000
   VCID: 2A0DFFE600F9F9370F3-807E

No fault code found.

-------------------------------------------------------------------------------
Address 10: Park/Steer Assist (J446)       Labels:. 8K0-919-475.clb
   Part No SW: 8K0 919 475 C    HW: 8K0 919 475 A
   Component: PARKHILFE 8K  H06 0010  
   Revision: 11001001    Serial number: 75230731706491
   Coding: 300001
   Shop #: WSC 06325 000 00000
   VCID: 392FD0AAF95F42AF769-806C

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags (J234)       Labels:| 8K0-959-655.clb
   Part No SW: 8K0 959 655 B    HW: 8K0 959 655 B
   Component: AirbagVW-AU10 H23 0409  
   Serial number: 0038JD11DDB$  
   Coding: 30323433363030303030554A305238543053
   Shop #: WSC 06325 000 00000
   ASAM Dataset: EV_AirbaECUVWAUDI010 A02001
   ROD: EV_AirbaECUVWAUDI010_A02.rod
   VCID: 3C21C9BEF6ED77876DF-8068

   Crash sensor for side airbag: driver side: 
   Serial number: 6334MSME3177541EF

   Crash sensor for side airbag: front passenger side: 
   Serial number: 6344MSME3174387DK

   Crash sensor for side airbag: rear: driver side: 
   Serial number: 6352QSME4577314BJ

   Crash sensor for side airbag: rear: passenger side: 
   Serial number: 6362QSME4628364BM

   Crash sensor for front airbag: driver side: 
   Serial number: 63732SME447B38395

   Crash sensor for front airbag: front passenger side: 
   Serial number: 63832SME447A4009 

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel (J527)       Labels:. 8K0-953-568.clb
   Part No SW: 8K0 953 568 F    HW: 8K0 953 568 F
   Component: Lenks.Modul   H10 0012  
   Revision: --------    Serial number: 90304GJV0002P 
   Coding: 000016
   Shop #: WSC 06325 000 00000
   VCID: 3D27C4BAED777E8F5A1-8068

   Component: E221 - MFL  H02 0003 

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments (J285)       Labels:. 8T0-920-xxx-17.clb
   Part No SW: 8T0 920 981 B    HW: 8T0 920 981 B
   Component: KOMBIINSTR.   H28 0214  
   Revision: 00100000    Serial number: 71Y36R5C7     
   Coding: 2F05010002002600010000
   Shop #: WSC 06325 000 00000
   VCID: 3B23CAA2F36370BF645-806E

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533)       Labels:. 8T0-907-468.clb
   Part No SW: 8T0 907 468 F    HW: 8T0 907 468 F
   Component: GW-BEM 4CAN-M H07 0084  
   Revision: EB002032    Serial number: 3200E07A178057
   Coding: 000003
   Shop #: WSC 00583 210 66199
   VCID: 44D1B15E8E9D0F4715F-8010

   Subsystem 1 - Part No SW: 8K0 915 181     HW: 8K0 915 181 
   Component: J367-BDM  H06 0150 
   Serial number: 17006C18221007      

No fault code found.

-------------------------------------------------------------------------------
Address 36: Seat Mem. Drvr (J136)       Labels:. 8T0-959-760.clb
   Part No SW: 8T0 959 760 B    HW: 8T0 959 760 B
   Component: MEM-FS        H09 0043  
   Revision: AA000000    Serial number: 00001001047015
   Coding: 08397325002444111000
   Shop #: WSC 06325 000 00000
   VCID: 42DDB74694890177273-8016

No fault code found.

-------------------------------------------------------------------------------
Address 37: Navigation        Labels: 4E0-910-88x-37.lbl
   Part No SW: 4E0 910 887 T    HW: 4E0 919 887 M
   Component: MNS ECE         H50 1030  
   Revision: 00000000    Serial number: 333K 077526955
   Shop #: WSC 00583 210 66199
   VCID: 3E25C3B6EC71659743B-806A

No fault code found.

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver (J386)       Labels:. 8K0-959-793.clb
   Part No SW: 8T0 959 793 J    HW: 8T0 959 793 D
   Component: TSG FA        H07 1301  
   Revision: --------    Serial number: --------------
   Coding: 011002225E01120102
   Shop #: WSC 74565 000 1048576
   VCID: 50F98D0E4AE5E3E7A17-8004

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv. (J393)       Labels:. 8K0-907-064-46.clb
   Part No SW: 8K0 907 289 C    HW: 8K0 907 289 C
   Component: BCM2.01       H38 0253  
   Revision: 00003002    Serial number: 0107198771    
   Coding: 011B0682003904C0002000
   Shop #: WSC 06335 000 00000
   VCID: 392FD0AAF95F42AF769-806C

   Subsystem 1 - Part No: 8K0 951 177 
   Component: DWA-Sensor  H02 0030 

   Subsystem 2 - Part No: 1K0 951 605 C
   Component: LIN BACKUP HO  H03 1301 

No fault code found.

-------------------------------------------------------------------------------
Address 47: Sound System (J525)       Labels:. 8T0-035-223-BOM.clb
   Part No SW: 8T0 035 223 M    HW: 8T0 035 223 C
   Component: DSP Prem      H12 0280  
   Revision: 00H12003    Serial number: 34813000942102
   Coding: 020101
   Shop #: WSC 12336 024 394758
   VCID: 3829D5AEC2555BA7897-806C

1 Fault Found:
02247 - Subwoofer (R148/R157) 
            007 - Short to Ground
             Freeze Frame:
                    Fault Status: 01100111
                    Fault Priority: 5
                    Fault Frequency: 1
                    Reset counter: 174
                    Mileage: 147338 km
                    Time Indication: 0
                    Date: 2018.05.25
                    Time: 16:32:28

             Freeze Frame:
                    Voltage: 12.00 V
                    Temperature: 5.0°C
                    Temperature: 8.0°C
                    Bin. Bits: 00000100


-------------------------------------------------------------------------------
Address 52: Door Elect, Pass. (J387)       Labels:. 8K0-959-792.clb
   Part No SW: 8K0 959 792     HW: 8K0 959 792 
   Component: TSG BF        H09 0149  
   Revision:             Serial number: ˆi
   Coding: 011002225E012201
   Shop #: WSC 06335 000 00000
   VCID: 7CA109BEB6EDB7872DF-8028

No fault code found.

-------------------------------------------------------------------------------
Address 53: Parking Brake (J540)       Labels: 8K0-907-801-V1.clb
   Part No SW: 8K0 907 801 C    HW: 8K0 907 801 C
   Component: EPB Audi B8   H03 0040  
   Revision: 00000003    Serial number: 00000000030043
   Shop #: WSC 00000 000 00000
   VCID: 2F3BEEF2371B9C1FD8D-807A

No fault code found.

-------------------------------------------------------------------------------
Address 55: Headlight Range        Labels: 8K0-907-357.clb
   Part No: 8K0 907 357 A
   Component: Dynamische LWR  H01 0010  
   Revision: 00000001    Serial number:               
   Coding: 0000002
   Shop #: WSC 06325 000 00000
   VCID: 3333E282D733B8FFBC5-8066

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio        Labels: 4E0-910-541.lbl
   Part No SW: 4E0 910 541 Q    HW: 4F0 035 541 L
   Component: TUNER EU/US/RDW H42 0620  
   Revision: 00000000    Serial number: 336KY077524392
   Coding: 0000001
   Shop #: WSC 06325 000 00000
   VCID: 2E05F3F63C119517D3B-807A

No fault code found.

-------------------------------------------------------------------------------
Address 6C: Back-up Cam.        Labels: 8T0-907-441.clb
   Part No SW: 8T0 907 441     HW: 4L0 907 441 A
   Component: J772__Rearview      0040  
   Revision: --H12---    Serial number: 525PA8-J7X5068
   Coding: 1022008
   Shop #: WSC 06325 000 00000
   VCID: 75B71C9A99C7E6CF521-8020

No fault code found.

-------------------------------------------------------------------------------
Address 77: Telephone        Labels: 4E0-910-336.lbl
   Part No SW: 4E0 910 336 K    HW: 4E0 862 335 
   Component: Handyvorb2      H18 0950  
   Revision: 00000000    Serial number: 00000005112835
   Coding: 0010920
   Shop #: WSC 00385 210 89996
   VCID: 2A0DFFE600F9F9370F3-807E

No fault code found.

End----------(Elapsed Time: 01:53, VBatt start/end: 12.1V/12.0V)-----------
 
   #2  

Jack@European_Parts

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Nice first post & welcome to the VCDS forum.

Is car stock update verified & not modified?

Maybe measure the DPF and CAT on one bank and compare to the other bank with vacuum gauge to authenticate the difference and the actual restriction levels.

Have you tried cleaning the DPF?

JPPSG for FOD
 
   #3  

M_Ayre

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Thanks for the reply.

The car is stock update and not modified in any way. The DPF has been cleaned by Terraclean, who also checked and cleaned the intake, turbo and throttle body although there was very little in terms of carbon deposits in these.

I don't have access to a Vacuum Gauge, but will see if I can get hold of one. In terms of the result should I manage to get hold of one, what should I be looking at as being acceptable back pressure?

This issue has had both garages puzzled as the car drives fine at all other times and still carries out the regenerations.

Thanks Michael
 
   #4  

Jack@European_Parts

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I don't have access to a Vacuum Gauge, but will see if I can get hold of one. In terms of the result should I manage to get hold of one, what should I be looking at as being acceptable back pressure?

Ref the RTFB and the instructions of the respective tester you use and orifice size because size in this case does matter!

or

Find a car that is in perfect working order and measure that one with what you make up and use as a comparison using a +/- 5% deviation max.
 
   #5  

HMC

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Hi Michael,
Do you know if the Exhaust Pressure Sensors were genuine or aftermarket?
Regards HMC
 
   #6  

PetrolDave

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The DPF has been cleaned by Terraclean
Are you 100% sure that the Terraclean has actually cleaned the DPF without damaging it or maybe even the throttle body?

Terraclean get a regular slating on most UK car owners forums for promising much but delivering little if any benefits.
 
   #7  

Jack@European_Parts

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OP: Do it yourself..........


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   #8  

M_Ayre

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The Pressure Sensors are genuine Audi from the Dealership, part 059 906 051A. I only ever get the same DTC's, nothing referring to the throttle body or any other components. I've not managed to manually compare the restriction levels yet. It's frustrating as the car can go months with out any issues then has a few days of persistent error codes.
 
   #9  

Janfi

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I would still look at the throttle body and check the plastic gears for missing thoots, I hade the same issue on my CAPA back in january and I think that the issue came from two componets: G450 and throttle body.
 
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