My main issue is fault codes for regeneration. I have had a mix of issues that I’ve been working through and not sure which way to go next. First I got P2459 for regeneration frequency. I replaced both differential pressure sensors and blew air through all rubber hoses to clear potential blocks. I drove it another 1000 miles and then I got code P026A charge air cooler efficiency below threshold and P2457 EGR insufficient cooling performance. I then noticed I had no heat and decided to flush the heater core to clear the blockage. I replaced the thermostat and the waterpump and I am back to regeneration faults. I recently went on a long trip interstate driving and after about 300 miles the dpf light kicked on. I shifted down and let it do its thing until I got off the interstate and the light went out. Another 30 miles or so and the dpf light kicks on again. I shifted down and after 15 minutes the glowplug light started flashing. I made it slowly to my stop and after an hour or so I drove off again without the dpf light on. I haven’t seen the dpf light again, but I’m not driving the interstate daily.
Sorry for the long story, but I wanted to throw out everything I’ve done so far. I have cleared out the codes after installing new parts. After I installed the new differential sensors, I adapted them and it said complete, so I hoped that I did that right. I performed a service regeneration and it completed with no issue. I still have heat, so I think I have coolant circulating good.
Any help on where to go next is appreciated!
Sorry for the long story, but I wanted to throw out everything I’ve done so far. I have cleared out the codes after installing new parts. After I installed the new differential sensors, I adapted them and it said complete, so I hoped that I did that right. I performed a service regeneration and it completed with no issue. I still have heat, so I think I have coolant circulating good.
Any help on where to go next is appreciated!
Code:
Saturday,01,November,2025,16:50:42:25518
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 25.3.2.0 (x64) HEX-V2 CB: 0.4671.5
Data version: 20250822 DS365.0
www.Ross-Tech.com
VIN: 1VWBN7A35DC133981 License Plate:
Chassis Type: A3-VW41 (7N0)
Scan: 01 03 08 09 15 16 17 19 1C 25 42 44 46 4F 52 56 62 72 77
VIN: 1VWBN7A35DC133981 Mileage: 308890km-191935miles
01-Engine -- Status: Malfunction 0010
03-ABS Brakes -- Status: Malfunction 0010
04-Steering Angle -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: Malfunction 0010
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
1C-Position Sensing -- Status: OK 0000
25-Immobilizer -- Status: OK 0000
42-Door Elect, Driver -- Status: Malfunction 0010
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
4F-Centr. Electr. II -- Status: OK 0000
52-Door Elect, Pass. -- Status: Malfunction 0010
56-Radio -- Status: Malfunction 0010
62-Door, Rear Left -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
77-Telephone -- Status: OK 0000
-------------------------------------------------------------------------------
Address 01: Engine (J623-CKRA) Labels:. 03L-906-012-CKR.clb
Part No SW: 03L 906 012 DD HW: 03L 907 309 S
Component: R4 2,0L EDC H24 8400
Revision: 71H24--- Serial number: CVN: D863370CD45710C1
Coding: 00190012042400000000
Shop #: WSC 46845 001 1048576
ASAM Dataset: EV_ECM20TDI01103L906012DD 004008
ROD: EV_ECM20TDI01103L906012DD.rod
VCID: 6988637F29FFD8A239D-803C
VINID: 0669D27874431544C10C32480429BD213B
2 Faults Found:
8863 - Particulate Filter
P2459 00 [11101000] - Regeneration Frequency
MIL ON - Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 2
Fault Frequency: 10
Mileage: 304458 km
Date: 2025.11.01.
Time: 07:34:34
Engine speed: 1652.00 /min
Normed load value: 54.5 %
Vehicle speed: 96 km/h
Coolant temperature: 96 °C
Intake air temperature: 27 °C
Ambient air pressure: 990 mbar
Voltage terminal 30: 14.400 V
Unlearning counter according OBD: 40
Exhaust gas jet volume in particle filter: 143.3 m³/h
Particle filter: difference pressure: 65 hPa
Particle filter: soot mass measured: 16.09 g
Particle filter: soot mass calculated: 16.08 g
Particle filter: differential pressure: dynamic offset: 1 hPa
Exhaust gas temperature sensor 3: 291.1 °C
Exhaust gas temperature sensor 4: 277.5 °C
8194 - Particulate Filter
P2458 00 [01101000] - Regeneration Duration
Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 2
Fault Frequency: 1
Mileage: 307623 km
Date: 2025.11.01.
Time: 15:58:17
Engine speed: 2422.00 /min
Normed load value: 52.2 %
Vehicle speed: 118 km/h
Coolant temperature: 94 °C
Intake air temperature: 28 °C
Ambient air pressure: 1000 mbar
Voltage terminal 30: 14.340 V
Unlearning counter according OBD: 30
Counter for regeneration time of particulate filter: 5400.10 s
Particle filter: kilometers since last regeneration: 205406 m
Particle filter: soot mass measured: 8.43 g
Particle filter: soot mass calculated: 0.23 g
Particle filter: differential pressure: dynamic offset: -3 hPa
Readiness: 1 2 0 0 0
-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104) Labels:. 1K0-907-379-EC1-V3.clb
Part No SW: 1K0 907 379 BL HW: 1K0 907 379 BL
Component: ESP MK60EC1 H31 0152
Revision: 00H31001
Coding: C54BC0F5492500FDA31403EC921A0042A71000
Shop #: WSC 09003 957 00200
VCID: 7DA0272F4DF75402E55-8028
1 Fault Found:
01325 - Control Module for Tire Pressure Monitoring (J502)
004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 2
Fault Frequency: 2
Reset counter: 19
Mileage: 304445 km
Time Indication: 0
Date: 2020.03.24.
Time: 00:01:44
Freeze Frame:
Count: 2
Count: 3
Count: 20480
Count: 16390
Count: 34560
Count: 0
Count: 771
Count: 0
-------------------------------------------------------------------------------
Address 08: Auto HVAC (J301) Labels:| 3C8-907-336.clb
Part No SW: 561 907 426 A HW: 561 907 426 A
Component: AC Manuell H02 0101
Revision: 00001K07
Coding: 0010001002
Shop #: WSC 09003 957 00200
ASAM Dataset: EV_ACManuaElectGen2BHTC 001002
ROD: EV_ACManuaElectGen2BHTC_VW41.rod
VCID: 196813BFB91F882269D-804C
No fault code found.
-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519) Labels:. 1K0-937-08x-09.clb
Part No SW: 5K0 937 085 S HW: 5K0 937 085 S
Component: BCM PQ35 B+ 021 0068
Revision: BH021001
Coding: 6F200E18902B08D408880001160004480071008650801560648060000C70
Shop #: WSC 09003 957 00200
VCID: 43D491D76B93E2F2D31-8016
1 Fault Found:
01504 - Bulb for License-Plate Light (X)
010 - Open or Short to Plus - Intermittent
Freeze Frame:
Fault Status: 00101010
Fault Priority: 2
Fault Frequency: 18
Reset counter: 33
Mileage: 304948 km
Time Indication: 0
Date: 2020.03.24.
Time: 15:43:41
Freeze Frame:
Term 15 On
Voltage: 12.00 V
ON
ON
OFF
OFF
OFF
-------------------------------------------------------------------------------
Address 15: Airbags (J234) Labels:| 5K0-959-655.clb
Part No SW: 5C0 959 655 AE HW: 5C0 959 655 AE
Component: AirbagVW10G 014 0851
Serial number: 003MWM01G9L/ Dataset Number: 560003v____ 0061
Coding: 00005033
Shop #: WSC 09003 957 00200
ASAM Dataset: EV_AirbaVW10SMEVW360 001026
ROD: EV_AirbaVW10SMEVW360.rod
VCID: 75B03F0F75470C42AD5-8020
Seat occupied recognition:
Subsystem 1 - Part No SW: 5C6 959 339 B HW: 5C6 959 339 B
Component: BF-Gewichtss. H10 0046
Serial number: 6940000Y130000T4VK0C
Coding: 303044
Crash sensor for side airbag: driver side:
Subsystem 2 - Part No SW: 5K0 959 354 HW: 5K0 959 354
Component: S.Sens.Fahr.V H02 ----
Serial number: 3572MSME4D061478ZZZ-
Crash sensor for side airbag: passenger side:
Subsystem 3 - Part No SW: 5K0 959 354 HW: 5K0 959 354
Component: S.Sens.Beif.V H02 ----
Serial number: 3582MSME29051478ZZZU
Rear Side Airbag Crash Sensor (on driver's side):
Subsystem 4 - Part No SW: 5K0 959 351 A HW: 5K0 959 351 A
Component: S.Sens.Fahr.H H02 ----
Serial number: 3516KSME5F226922ZZZW
Passenger side rear thorax airbag crash sensor:
Subsystem 5 - Part No SW: 5K0 959 351 A HW: 5K0 959 351 A
Component: S.Sens.Beif.H H02 ----
Serial number: 3526KSME0B797422ZZZW
Crash sensor for front airbag: driver side:
Subsystem 6 - Part No SW: 5K0 959 659 A HW: 5K0 959 659 A
Component: F.Sens.Fahr H02 ----
Serial number: 3556LSME00515521ZZZD
Crash sensor for front airbag: passenger side:
Subsystem 7 - Part No SW: 5K0 959 659 A HW: 5K0 959 659 A
Component: F.Sens.Beif H02 ----
Serial number: 3566LSME25575521ZZZR
No fault code found.
-------------------------------------------------------------------------------
Address 16: Steering wheel (J527) Labels:| 5K0-953-569.clb
Part No SW: 1K5 953 521 AK HW: 5K0 953 569 B
Component: LENKS.MODUL 016 0140
Revision: FF010041 Serial number: 20130220200146
Coding: 008A140000
Shop #: WSC 09003 957 00200
ASAM Dataset: EV_SMLSNGVOLWSXS A01004
ROD: EV_SMLSNGVOLWS.rod
VCID: 76B238036841075AA4F-8022
Multifunction steering wheel control module:
Subsystem 1 - Part No SW: 3C8 959 537 D HW: 3C8 959 537 D Labels: 3C8-959-537.CLB
Component: E221__MFL-YVJ H07 0022
Coding: E20000
No fault code found.
-------------------------------------------------------------------------------
Address 17: Instruments (J285) Labels:| 5K0-920-XXX-17.clb-SRI1
Part No SW: 561 920 970 E HW: 561 920 970 E
Component: KOMBI H07 0705
Serial number: 00000000000000
Coding: 231E01
Shop #: WSC 09003 957 00200
ASAM Dataset: EV_Kombi_UDS_VDD_RM09 A04716
ROD: EV_Kombi_UDS_VDD_RM09_004_VW41.rod
VCID: 1C660AABB62DFD0A72B-8048
No fault code found.
-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533) Labels:. 7N0-907-530-V2.clb
Part No SW: 7N0 907 530 AH HW: 7N0 907 530 AH
Component: J533 Gateway H50 1634
Revision: H50 Serial number: 12041303290660
Coding: 461000
Shop #: WSC 09003 957 00200
VCID: 76B2380368C1075AA4F-8022
No fault code found.
-------------------------------------------------------------------------------
Address 1C: Position Sensing Labels: 1Kx-919-xxx-1C.lbl
Part No SW: 561 919 965 HW: 561 919 965
Component: Kompass 002 0001
Revision: 00002000 Serial number: 1829227R422R06
Coding: 0000002
Shop #: WSC 09003 957 00200
VCID: 63947157C75382F2F31-8036
No fault code found.
-------------------------------------------------------------------------------
Address 25: Immobilizer (J334) Labels:| 5K0-920-xxx-25.clb
Part No SW: 5K0 953 234 HW: 5K0 953 234
Component: IMMO H07 0705
Serial number:
Coding: 000000
Shop #: WSC 09003 957 00200
ASAM Dataset: EV_Immo_UDS_VDD_RM09 A03709
ROD: EV_Immo_UDS_VDD_RM09_VW23.rod
VCID: 6A8A1C732CF9D3BA307-803E
No fault code found.
-------------------------------------------------------------------------------
Address 42: Door Elect, Driver (J386) Labels:| 3C0-959-70X-GEN4.clb
Part No SW: 561 959 701 HW: 3C0 959 793 B
Component: TUER-SG FT 002 0525
Revision: 13110009 Serial number: 0006538472
Coding: 0404F5
Shop #: WSC 09003 957 00200
ASAM Dataset: EV_TSGFPQ25BRFVW46X A04001
ROD: EV_TSGFPQ25BRFVW46X.rod
VCID: 5BE449B7F3A3BA32BB1-800E
Slave Driver:
Subsystem 1 - Part No SW: 561 959 811 B HW: 561 959 811 B Labels: 1K0-959-70X-GEN4.CLB
Component: J388__TSG_HL 006 5470
Serial number: 14102630130410074356
Coding: 800000
1 Fault Found:
131584 - Motor for Rear Window Regulator
B11EE 54 [00001000] - Missing Calibration / Basic Setting
Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 7
Fault Frequency: 2
Reset counter: 19
-------------------------------------------------------------------------------
Address 44: Steering Assist Labels: 1K0-909-14x-GEN3.clb
Part No: 1K0 909 144 P
Component: EPS_ZFLS Kl. 290 3305
Revision: 00H22000
Shop #: WSC 01357 011 00200
VCID: 372CF507234BBE527F9-8062
No fault code found.
-------------------------------------------------------------------------------
Address 4F: Centr. Electr. II (J520) Labels:. 1K0-907-532.clb
Part No SW: 7N0 907 532 HW: 7N0 907 530 AH
Component: EZE_2 H50 1634
Revision: H50 Serial number: 12041303290660
Coding: 00000008
Shop #: WSC 09003 957 00200
VCID: 6FBC0D67179B3692679-803A
Subsystem 1 - Part No SW: 561 919 204 B HW: 561 919 204 B
Component: Analoguhr 008 0005
No fault code found.
-------------------------------------------------------------------------------
Address 52: Door Elect, Pass. (J387) Labels:| 3C0-959-70X-GEN4.clb
Part No SW: 561 959 702 HW: 3C0 959 792 B
Component: TUER-SG BT 002 0525
Revision: 15110009 Serial number: 0006498914
Coding: 0404F4
Shop #: WSC 09003 957 00200
ASAM Dataset: EV_TSGBPQ25BRFVW46X A04001
ROD: EV_TSGBPQ25BRFVW46X.rod
VCID: 5CE64AABF6ADBD0AB2B-8008
Slave Passenger:
Subsystem 1 - Part No SW: 561 959 812 B HW: 561 959 812 B Labels: 1K0-959-70X-GEN4.CLB
Component: J389__TSG_HR 006 5470
Serial number: 14202631130416112732
Coding: 800000
1 Fault Found:
131584 - Motor for Rear Window Regulator
B11EE 54 [00001000] - Missing Calibration / Basic Setting
Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 7
Fault Frequency: 2
Reset counter: 23
-------------------------------------------------------------------------------
Address 56: Radio (J503) Labels:. 5M0-035-1xx-56.clb
Part No SW: 1K0 035 180 AF HW: 1K0 035 180 AF
Component: Radio Prem-8 H05 0008
Revision: -----09S Serial number: VWZ4Z7N3449665
Coding: 0500040004000B
Shop #: WSC 09003 957 00200
VCID: 6496724BCE5D85CA0AB-8030
1 Fault Found:
02635 - Tuner Not Enabled/Activated
000 - -
Freeze Frame:
Fault Status: 01100000
Fault Priority: 7
Fault Frequency: 20
Reset counter: 233
Mileage: 180728 km
Time Indication: 0
Date: 2018.08.08.
Time: 14:49:17
-------------------------------------------------------------------------------
Address 77: Telephone (J412) Labels:| 7P6-035-730.clb
Part No SW: 7P6 035 730 K HW: 7P6 035 730 K
Component: TELEFON H15 3200
Revision: 1B001001 Serial number: 00007664288857 Dataset Number: 7P6035730K 0001
Coding: 0A10040000010110
Shop #: WSC 09003 957 00200
ASAM Dataset: EV_UHVNA 002720
ROD: EV_UHVNA_002_VW25.rod
VCID: 3A2AEC331CD9A33A807-806E
No fault code found.
End----------(Elapsed Time: 00:59, VBatt start/end: 12.5V/12.5V)-----------
------------------------------7 Faults Found-------------------------------
