Hi all

 

More motor woes and in need of a little advice please.

 

Finally plucked up the courage to get my mechanic lift the engine cover and open the foil pouch to examine the exhaust pressure sensor and the DPF diff pressure sensor which were throwing fault codes and an engine light and limp mode on my newly acquired 250k mile '17 Mk3..needless to say the sight of 2 sensors and a wiring loom burnt to a crisp have left me with a very sinking feeling.

 

Mechanics advice upon scanning and observing codes and said mech damage is that the DPF was very much blocked (you don't say!) and the XS heat and back pressure most likely did the damage.

 

Just one question for you Smithys on here...should I have got the DPF dash light ('dots in the box') to indicate a fault/blockage as standard under the circumstances or is the lack of a dash light indicating same more common than imagined?

 

Best regards and thanks in advance.

 

J. 😉

Not sure the DPF needs to be blocked to cause the pressure sensor to burn out. More likely an EGR blockage or something that prevented the extinguish of a successful active regeneration. 

Lots of failures reported on here, never heard of anyone saying the replacement burnt out again shortly after.  But I don't read or remember everything.

 

Photo of the damage?

 

Edited 30 May, 20233 yr by Breezy_Pete

Pete

 

Many thanks for your input on this.

 

Photo as requested, have no idea what I am even looking at mech wise but 'it' or ''they even once lived in the foil pouch under the plastic engine cover...I'm assuming they are the said ex-sensors that threw the fault codes but you can tell me different.

 

Sure have a cut off it anyway, opinion much appreciated mate. Thx

Fault Codes logged as follows;

 

   Mileage: 408832km-254036miles

01-Engine -- Status: Malfunction 0010
03-ABS Brakes -- Status: OK 0000
08-Auto HVAC -- Status: Malfunction 0010
09-Cent. Elect. -- Status: OK 0000
10-Park/Steer Assist -- Status: OK 0000
13-Auto Dist. Reg -- 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
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
4B-Multifunc. Module -- Status: INTERFACE NOT COMPATIBLE
52-Door Elect, Pass. -- Status: OK 0000
5F-Information Electr. -- Status: OK 0000
 
-------------------------------------------------------------------------------
Address 01: Engine (J623-CRLB)       Labels:. 04L-907-309-V1.clb
   Part No SW: 04L 906 026 ES    HW: 04L 907 309 R
   Component: R4 2.0l TDI   H23 1989  
   Revision: B5H23---    CVN: 461E1682
   Coding: 0119001204251D082000
   Shop #: WSC 01286 386 08256
   ASAM Dataset: EV_ECM20TDI01104L906026ES 002002
   ROD: EV_ECM20TDI01104L906026ES_002_SK48.rod
   VCID: 7F06748FE63BDC6BB2-802A
   VINID: 91D4926077A02581C5046104084A6D6720

7 Faults Found:
20169 - Exhaust Pressure Sensor 1
          P0471 00 [101] - Implausible Signal
          Not Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Mileage: 408743 km
                    Date: 2023.05.24
                    Time: 14:49:34

                    Engine RPM: 0.00 /min
                    Normed load value: 0.0 %
                    Vehicle speed: 0 km/h
                    Coolant temperature: 92 °C
                    Intake air temperature: 62 °C
                    Ambient air pressure: 1010 mbar
                    Voltage terminal 30: 12.660 V
                    Unlearning counter according OBD: 40
                    Exhaust mass flow of low-pressure EGR: calculated: 4.995
                    Differential pressure ratio: low-pressure EGR: 0.0 kg/h
                    Exh.recircul. 2: differential pres.sensor 1 bank 1: adap. value: 475.4 hPa
                    Exhaust recirculat.2: different.press.sens.1 bank 1: raw value: 670.7 hPa
                    Exh.recircul.valve 1 bank 1: pos.feedback - Actual value: 0.00 %
                    Exhaust recirc.valve 2 bank 1: posit.feedback - Actual value: 0.00 %

12002 - Particulate Filter; Differential Pressure Sensor
          P2453 00 [101] - Implausible Signal
          Not Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Mileage: 408735 km
                    Date: 2023.05.24
                    Time: 14:29:08

                    Engine RPM: 0.00 /min
                    Normed load value: 0.0 %
                    Vehicle speed: 0 km/h
                    Coolant temperature: 91 °C
                    Intake air temperature: 59 °C
                    Ambient air pressure: 1010 mbar
                    Voltage terminal 30: 12.680 V
                    Unlearning counter according OBD: 40
                    Particle filter: air pressure sensor 1 bank 1: raw value: -221 hPa
                    Particl.filt.: different.press.sensor 1 bank 1: adaptat. value: -71 hPa
                    Par.fil: diff.pr.sens.1 bank 1: offset: 195 hPa
                    Particl.filt.: differential pressur.sensor 1 bank 1: dyn.offset: -150 hPa
                    Outside temperature sensor 1: B1: raw value: 20.0 °C
                    Particle filter: soot mass measured: -12.00 g
                    Particle filter: soot mass calculated: 13.97 g

5158 - Diesel Particulate Filter; Differential Pressure Sensor
          P2456 00 [096] - Intermittent
          Intermittent - Not Confirmed - Tested Since Memory Clear

19226 - Particulate Trap Bank 1
          P2002 00 [237] - Efficiency Below Threshold
          MIL ON - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Mileage: 408731 km
                    Date: 2023.05.24
                    Time: 14:22:24

                    Engine RPM: 1426.50 /min
                    Normed load value: 98.0 %
                    Vehicle speed: 84 km/h
                    Coolant temperature: 93 °C
                    Intake air temperature: 68 °C
                    Ambient air pressure: 1010 mbar
                    Voltage terminal 30: 14.400 V
                    Unlearning counter according OBD: 40
                    Exhaust mass flow of low-pressure EGR: calculated: 3.593
                    Differential pressure ratio: low-pressure EGR: 34.3 kg/h
                    Exh.recircul. 2: differential pres.sensor 1 bank 1: adap. value: 784.2 hPa
                    Exhaust recirculat.2: different.press.sens.1 bank 1: raw value: 956.6 hPa
                    Exh.recircul.valve 1 bank 1: pos.feedback - Actual value: 42.75 %
                    Exhaust recirc.valve 2 bank 1: posit.feedback - Actual value: 48.79 %

19225 - Boost Pressure Regulation
          P0299 00 [101] - Control Range Not Reached
          Not Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Mileage: 408823 km
                    Date: 2023.05.24
                    Time: 20:09:43

                    Engine RPM: 2016.00 /min
                    Normed load value: 100.0 %
                    Vehicle speed: 118 km/h
                    Coolant temperature: 92 °C
                    Intake air temperature: 98 °C
                    Ambient air pressure: 1010 mbar
                    Voltage terminal 30: 13.300 V
                    Unlearning counter according OBD: 40
                    Charge air pressure: specified value: 1979 hPa
                    Charge air cooler inlet: pressure sensor 1 bank 1: raw value: 1550.8 hPa
                    Mass airflow sensor 1 bank 1 airflow: raw value: 472.9 mg/stroke
                    Exhaust recirc.valve 1 bank 1: posit.feedback - Actual value: 0.00 %
                    Throttl.valve adapt. 1 bank 1: posit feedback - Actual value: 0.00 %
                    Turbine actuator 1 bank 1: posit.feedback - Actual value: 93.71 %
                    Mean injection quantity: 20.50 mg/stroke

25710 - Boost Pressure Regulation
          P0299 00 [101] - Control Range Not Reached
          Not Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Mileage: 408823 km
                    Date: 2023.05.24
                    Time: 20:09:43

                    Engine RPM: 2006.50 /min
                    Normed load value: 99.6 %
                    Vehicle speed: 118 km/h
                    Coolant temperature: 92 °C
                    Intake air temperature: 98 °C
                    Ambient air pressure: 1010 mbar
                    Voltage terminal 30: 13.320 V
                    Unlearning counter according OBD: 40
                    Charge air pressure: specified value: 1976 hPa
                    Charge air cooler inlet: pressure sensor 1 bank 1: raw value: 1550.0 hPa
                    Mass airflow sensor 1 bank 1 airflow: raw value: 475.2 mg/stroke
                    Exhaust recirc.valve 1 bank 1: posit.feedback - Actual value: 0.00 %
                    Throttl.valve adapt. 1 bank 1: posit feedback - Actual value: 0.00 %
                    Turbine actuator 1 bank 1: posit.feedback - Actual value: 93.71 %
                    Mean injection quantity: 30.87 mg/stroke

9764 - Exhaust Pressure Sensor 1
          P0470 00 [039] - Malfunction
          Not Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 3
                    Mileage: 408728 km
                    Date: 2023.05.24
                    Time: 14:18:26

                    Engine RPM: 2306.50 /min
                    Normed load value: 99.6 %
                    Vehicle speed: 135 km/h
                    Coolant temperature: 93 °C
                    Intake air temperature: 101 °C
                    Ambient air pressure: 1020 mbar
                    Voltage terminal 30: 13.320 V
                    Unlearning counter according OBD: 40
                    Mass airflow sensor 1 bank 1 airflow: raw value: 766.2 mg/stroke
                    Exhaust recirc.valve 2 bank 1: posit.feedback - Specified value: 0.00 %
                    Exhaust recirc.valve 2 bank 1: posit.feedback - Actual value: 0.01 %
                    Exhaust recirc.valve 2 bank 1: posit.feedback - Offset closed: 0.18 %
                    Exhaust recirculation valve 2 bank 1: monitoring - status-Bits 0-7: 7
                    Exhaust recirculation valve 2 bank 1: monitoring - status-Bits 0-7: 0
                    Exhaust recirculation valve 2 bank 1: monitoring - status-Bits 0-7: 0
                    Exhaust recirculation valve 2 bank 1: monitoring - status-Bits 0-7: 64
                    Exhaust recirc.valve 2 bank 1: posit.feedback - Raw voltage: 692.6 mV

Readiness: 1 1 0 0 0

-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104)       Labels: 5Q0-907-379-IPB-V1.clb
   Part No SW: 5Q0 614 517 CG    HW: 5Q0 614 517 AG
   Component: ESC           H62 0643  
   Revision: 00000000    Serial number: 63376000003190
   Coding: 1D07929C34210B72477B060440C549B8492CD0E2600292751063F078C002420000000012121212B835351919323200
   Shop #: WSC 33361 790 00157
   ASAM Dataset: EV_Brake1UDSContiMK100IPB 036010
   ROD: EV_Brake1UDSContiMK100IPB_036_VW37.rod
   VCID: 78F49F93C315EB53F3-802C

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC (E87)       Labels:| 3V0-907-044.clb
   Part No SW: 3V0 907 044 EE    HW: 3V0 907 044 EE
   Component: AC Automat    H34 4101  
   Revision: 20K07000    Serial number: 00000B00326769 Dataset Number: 0000
   Coding: 11110104002110011005000000101002
   Shop #: WSC 33361 790 00157
   ASAM Dataset: EV_ACClimaPrehVW37X 002019
   ROD: EV_ACClimaPrehVW37X_002_VW37.rod
   VCID: 7BFE809FF223C04B9E-802E

   Humidity sensor: exterior:

   Rear air conditioning block 1:

1 Fault Found:
263425 - Air Quality Sensor
          B10AF 04 [009] - Internal System Fault
          Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 3
                    Fault Frequency: 11
                    Reset counter: 58
                    Mileage: 408728 km
                    Date: 2023.05.24
                    Time: 12:44:34

                    Outside temperature: 21.5 °C
                    Voltage terminal 30: 12.0 V
                    System run time-Engine running time: 0 s
                    System run time-Terminal 15 on: 253 s
                    Air quality status: Malfunction
                    System run time-Engine running time: 0 s
                    System run time-Terminal 15 on: 253 s

-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519)       Labels:. 5Q0-937-08X-V2.clb
   Part No SW: 5Q0 937 084 CF    HW: 5Q0 937 084 CF
   Component: BCM MQBAB M+  H34 0236  
   Serial number: 02001633100903 Dataset Number: V03935253VP 0001
   Coding: 000000000000000000000000000000000000000000000000000000000000
   Shop #: WSC 33361 790 00157
   ASAM Dataset: EV_BCMMQB 017001
   ROD: EV_BCMBOSCH_017.rod
   VCID: 7EF8898BE131D563B9-802A

   Wiper motor control module:
   Subsystem 1 - Part No SW: 3V2 955 119     HW: 3V1 955 119   Labels: 5QX-955-119-V1.CLB
   Component: 48x RL 161025  032 0121
   Serial number: 00000001610200302472
   Coding: 165DDD

   Rain/Light Recognition Sensor:
   Subsystem 2 - Part No SW: 5Q0 955 547 B    HW: 5Q0 955 547 B  Labels: 5Q0-955-547.CLB
   Component: RLHS  042 0105
   Serial number: S7Y16M11D28H23M13S15
   Coding: 00084D

No fault code found.

-------------------------------------------------------------------------------
Address 10: Park/Steer Assist (J446)       Labels:| 5Q0-919-283.clb
   Part No SW: 5QA 919 283 A    HW: 5QA 919 283
   Component: PDC 4 KanalH07 0038  
   Serial number: 000308419616302 Dataset Number: V03935245MJ 0001
   Coding: 0601050001
   Shop #: WSC 33361 790 00157
   ASAM Dataset: EV_EPHVA14AU3700000 009029
   ROD: EV_EPHVA14AU3700000_009_AU37.rod
   VCID: 48942F53F3755BD343-801C

No fault code found.

-------------------------------------------------------------------------------
Address 13: Auto Dist. Reg (J428)       Labels:| 3Q0-907-572.clb
   Part No SW: 3Q0 907 572 C    HW: 3Q0 907 572 C
   Component: ACC BOSCH MQB H04 0195  
   Dataset Number: V03935249LS 0001
   Coding: 2A00600111FFC428949C8045
   Shop #: WSC 33361 790 00157
   ASAM Dataset: EV_ACCBOSCHVW48X 001009
   ROD: EV_ACCBOSCHVW48X.rod
   VCID: 356A56A79487D63B28-8060

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags (J234)       Labels:| 5Q0-959-655.clb
   Part No SW: 5Q0 959 655 AT    HW: 5Q0 959 655 AT
   Component: AirbagVW21    003 0317  
   Serial number: 003TYR2CKGKY Dataset Number: V03935246GC 0001
   Coding: 98CCC0C0000000005C5400CF008800000065
   Shop #: WSC 33361 790 00157
   ASAM Dataset: EV_AirbaVW20SMEVW37X 002154
   ROD: EV_AirbaVW20SMEVW37X_VW37.rod
   VCID: 1220CD3BC5A921036D-8046

   Crash sensor for side airbag: driver side:
   Subsystem 1 - Part No SW: -----------    HW: 480 002 511 16
   Component: SideSensor_Df  001 0887
   Serial number: 357000000001915CA02C
   Coding: 2D2D2D

   Front Passenger's Side Airbag Crash Sensor:
   Subsystem 2 - Part No SW: -----------    HW: 480 003 011 16
   Component: SideSensor_Pf  001 0887
   Serial number: 358000000001D9194F1Q
   Coding: 2D2D2D

   Rear Side Airbag Crash Sensor (on driver's side):
   Subsystem 3 - Part No SW: -----------    HW: 480 402 511 16
   Component: SideSensor_Dr  000 6149
   Serial number: 3510001B72303C83D72
   Coding: 2D2D2D

   Passenger side rear thorax airbag crash sensor:
   Subsystem 4 - Part No SW: -----------    HW: 480 402 511 16
   Component: SideSensor_Pr  000 6149
   Serial number: 3520001B72303C84F30-
   Coding: 2D2D2D

   Crash sensor for front airbag: driver side:
   Subsystem 5 - Part No SW: -----------    HW: 480 402 211 16
   Component: FrontSensor_D  000 6149
   Serial number: 3550001B72388B532390
   Coding: 2D2D2D

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel (J524)       Labels:| 5Q0-953-549.clb
   Part No SW: 5Q0 953 521 EM    HW: 5Q0 953 569 A
   Component: Lenks.Modul   075 0235  
   Revision: FF034034    Serial number: 20161122500872 Dataset Number: V03935250QX 0001
   Coding: 1004
   Shop #: WSC 33361 790 00157
   ASAM Dataset: EV_SMLSVALEOMQB 001015
   ROD: EV_SMLSVALEOMQB.rod
   VCID: 0102F27790CFAA9BC4-8054

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments (J285)       Labels:| 5G0-920-XXX-17.clb-SRI3
   Part No SW: 3V0 920 741 A    HW: 3V0 920 741 A
   Component: KOMBI         205 8311  
   Coding: 27A501022B80000801882A011000000000000000
   Shop #: WSC 73430 031 00157
   ASAM Dataset: EV_DashBoardVDDMQBAB 009051
   ROD: EV_DashBoardVDDMQBAB_009_VW26.rod
   VCID: 316262B760EFFA1B74-8064

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533)       Labels:| 3Q0-907-530-V1.clb
   Part No SW: 3Q0 907 530 C    HW: 3Q0 907 530 C
   Component: GW MQB High   515 5286  
   Serial number: 29111610521552 Dataset Number: V03935242BZ 0001
   Coding: 030100045F087300EB00024A080F00010001070000000000000000000000
   Shop #: WSC 33361 790 00132
   GVL: 01563C0000000000400C80000000480000000000000200000000000000000000
   ASAM Dataset: EV_GatewNF 013020
   ROD: EV_GatewNF_VW37.rod
   VCID: 2F6664CF76DBECEB62-807A

   Generator:

   Multifunction steering wheel control module:
   Subsystem 2 - Part No SW: 3V0 919 719 A    HW: 3V0 919 719 A
   Component: E221__MFL-PR6  H02 0160
   Serial number: 000000000C2905191116

   Battery Monitoring Control Module:
   Subsystem 3 - Part No SW: 5Q0 915 181 K    HW: 5Q0 915 181 K
   Component: J367-BDMHella  H10 9070
   Serial number: 6986902204          

No fault code found.

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver (J386)       Labels:| 5QX-959-X93-42.clb
   Part No SW: 5Q4 959 593 E    HW: 5Q4 959 593 B
   Component: TSG FS        010 0032  
   Serial number: 0000230104368  Dataset Number: V03935252AG 0001
   Coding: 001D0120D001040000001100
   Shop #: WSC 33361 790 00055
   ASAM Dataset: EV_DCUDriveSideEWMAXCONT 006001
   ROD: EV_DCUDriveSideEWMAXCONT.rod
   VCID: 47962C6FFE6B54AB4A-8012

   Rear Driver Side Door Control Module:
   Subsystem 1 - Part No SW: 5Q0 959 812 A    HW: 5Q0 959 812 A  Labels: 5QX-959-81X-V1.CLB
   Component: FOND_FHSG_DRV  005 0005
   Serial number: 00000000000012493054
   Coding: 0D0200

No fault code found.

-------------------------------------------------------------------------------
Address 44: Steering Assist (J500)       Labels:| 5Q0-909-144.clb
   Part No SW: 5Q0 909 144 T    HW: 5Q0 909 144 R
   Component: EPS_MQB_ZFLS  128 1072  
   Dataset Number: V03935236TH 0001
   Coding: 0107
   Shop #: WSC 33361 790 00157
   ASAM Dataset: EV_SteerAssisMQB 013144
   ROD: EV_SteerAssisMQB_013.rod
   VCID: 458A2667C46746BBB8-8010

No fault code found.

-------------------------------------------------------------------------------
Address 4B: Multifunc. Module
Interface not compatible.
Please upgrade to a current Ross-Tech interface.

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass. (J387)       Labels:| 5QX-959-X92-52.clb
   Part No SW: 5Q4 959 592 E    HW: 5Q4 959 592 B
   Component: TSG BFS       010 0032  
   Serial number: 0000229399880  Dataset Number: V03935252FA 0001
   Coding: 001D0320D001040000001100
   Shop #: WSC 33361 790 00055
   ASAM Dataset: EV_DCUPasseSideEWMAXCONT 006001
   ROD: EV_DCUPasseSideEWMAXCONT.rod
   VCID: 4688216BF9614DA3B1-8012

   Rear Passenger Door Control Module:
   Subsystem 1 - Part No SW: 5Q0 959 811 A    HW: 5Q0 959 811 A  Labels: 5QX-959-81X-V1.CLB
   Component: FOND_FHSG_PSG  005 0005
   Serial number: 00000000000012470970
   Coding: 150200

No fault code found.

-------------------------------------------------------------------------------
Address 5F: Information Electr. (J794)       Labels:| 3V0-035-MIB-STD2.clb
   Part No SW: 5Q0 035 840 B    HW: 5Q0 035 840 B
   Component: MU-S--ER      H30 0359  
   Serial number: SKZAZ2S5286813 Dataset Number: V03935251HE 0001
   Coding: 03840100FF00000051110001000808002F0100C60120010002
   Shop #: WSC 33361 790 00157
   ASAM Dataset: EV_MUStd4CTSAT 001022
   ROD: EV_MUStd4CTSAT_VW48.rod
   VCID: 2C5C73C347CD97F347-8078

   Display and control head 1 for information electronics:
   Subsystem 1 - Part No SW: 3V0 919 606 B    HW: 3V0 919 606 B
   Component: ABT_High-2  H47 1031
   Serial number: SKZ8Z9SSC007QF      

No fault code found.

End-------------------------(Elapsed Time: 04:41)--------------------------

 

 

Not much left in there!

Not sure, but I think maybe the DPF fault light should probably illuminate briefly at ignition on? Check to see whether it does or doesn't, and see if someone with same car can say if it should. Secondhand, higher mileage cars sometimes have pieces of black tape blocking certain fault LEDs...

Or illumination  bulbs missing possibly...bit of a stretch chap but anything is possible I guess.

 

Oh well..it's back with the dealer/seller so I'll just have to see where he goes from here...interesting upon reporting an original MIL/Engine light the nuclear option of DPF removal was the first 'cure' offered. We'll see I guess.

 

Many thanks again

 

J. 😉

Much harder to remove a surface mount LED than to block the light path from it. Long time since removable incandescent bulbs were used.