2012 Jetta won't pass emissions

dieseldonato

Veteran Member
Joined
Mar 10, 2023
Location
Us
TDI
2001 jetta
Just to clarify, there is no diesel emissions in PA. The regular inspection your supposed to verify all emission compliance devices are there.
 

IndigoBlueWagon

TDIClub Enthusiast, Principal IDParts, Vendor , w/
Joined
Aug 16, 2004
Location
South of Boston
TDI
'97 Passat, '99.5 Golf, '02 Jetta Wagon, '15 GSW
Just to clarify, there is no diesel emissions in PA. The regular inspection your supposed to verify all emission compliance devices are there.
What does this mean? They inspect for the hardware? Check readiness in the ECU? Neither?
 

oilhammer

Certified Volkswagen Nut & Vendor
Joined
Dec 11, 2001
Location
outside St Louis, MO
TDI
There are just too many to list....
Normally it is just a visual inspection, same as always where applicable. Of course, unless someone actually knows these cars, he or she may overlook something.
 

IndigoBlueWagon

TDIClub Enthusiast, Principal IDParts, Vendor , w/
Joined
Aug 16, 2004
Location
South of Boston
TDI
'97 Passat, '99.5 Golf, '02 Jetta Wagon, '15 GSW
I just know of a bunch of folks who have deleted CR cars in PA and they wouldn't pass a visual inspection, if the inspector knows what he's looking at.

Funny side story: When MA started checking ECUs I got flagged because I had a Euro base tune in my ALH that didn't show EGR readiness. And I had a race pipe on it. I had to go for a secondary inspection, so I put the EGR back on, but since I have a PD150 manifold it also didn't have an EGR cooler. I was worried that the inspector would catch this. When I took the car I was asked to go to the waiting room at the station. The inspector came in a few minutes later and I thought, "now I'm in trouble." The inspector asked "Is this a 4 cylinder?" I need not have worried.
 

dieseldonato

Veteran Member
Joined
Mar 10, 2023
Location
Us
TDI
2001 jetta
I just know of a bunch of folks who have deleted CR cars in PA and they wouldn't pass a visual inspection, if the inspector knows what he's looking at.

Funny side story: When MA started checking ECUs I got flagged because I had a Euro base tune in my ALH that didn't show EGR readiness. And I had a race pipe on it. I had to go for a secondary inspection, so I put the EGR back on, but since I have a PD150 manifold it also didn't have an EGR cooler. I was worried that the inspector would catch this. When I took the car I was asked to go to the waiting room at the station. The inspector came in a few minutes later and I thought, "now I'm in trouble." The inspector asked "Is this a 4 cylinder?" I need not have worried.
Depends on the area how hard inspectors are about that stuff, it has to be there but we're not required to check for function. Visual only. Pretty rural where I live, so no one worries if certain things fell off. Just don't be fogging out the parking lot when you show up and everything will be good.
 

Zak99b5

Veteran Member
Joined
Apr 30, 2021
Location
Albany NY
TDI
2003 Jetta TDI
Well, OP is in NY, where car needs to pass both visual and OBD emissions until the car is 25 years old.

I'm curious about the SAI readiness as well. Makes no sense, but OP might have been told that by the mech who misspoke?
 

Steve Addy

Top Post Dawg
Joined
Aug 7, 2002
Location
Iowa
TDI
97 Mk3
Well, OP is in NY, where car needs to pass both visual and OBD emissions until the car is 25 years old.

I'm curious about the SAI readiness as well. Makes no sense, but OP might have been told that by the mech who misspoke?
Yeah, the OP situation has no resolution without reversing the mods made...the seller got out of a problem I'd say. It won't pass visual no matter what and unless he goes back to the tune provider and pays to get the readiness modified (visual aside) he's not going anywhere in NY.

Steve
 

Rob Mayercik

Veteran Member
Joined
Dec 19, 2001
Location
NJ, U.S.A.
TDI
2002 Jetta GLS, Baltic Green/Beige
Makes me "partially" glad for how NJ does inspections currently - passenger vehicles 8000 GVWR and under, only 1996 and newer must be tested, and only via OBD-II interface, so my 02 Jetta gets a computer scan once every other year. 1995 and older with GVWR under 8000, exempt from all inspections since 2016. Guess not enough "business" to warrant paying the contractor to to continue doing tailpipe sniffer+dynamometer testing on the small number of remaining older vehicles.

So, while I'm glad I haven't had to keep running my occasionally-driven-but-still-maintained 1992 (OBD-I) Jeep to inspection for a while now, I do sometimes wish they'd at least go back to checking headlight aim again.

Now, if they'd just do something about all the defective "D-1" modules* that forget to turn on the exterior lights at night/during inclement weather like the law says...

* "D-1" is a joking part number for the driver, or (if you prefer) the "loose nut behind the wheel"
 

jetta_tdi12

Member
Joined
Mar 6, 2023
Location
Western NY
TDI
2012 Jetta TDI
Hey everyone. Just thought I'd update this post real quick.

After I posted originally, I got in contact with Malone/Tunezilla. They told me that they don't set readiness in their tunes because they are for "off road use only." I had some people recommend getting another tune made by Stevenson or MR Tuning, who will set readiness.

However, NY is currently rolling out new inspection machines and software. Rumor has it that they will be able to detect if a computer has been reprogrammed to force readiness. I'm not sure if its true but I don't want to find out the hard way. The car won't pass a visual anyway.

Long story short, I've been working on "un-deleting" the Jetta. Right now I'm waiting on some parts from VW but I will try to keep this post updated as I go.

As for the Secondary Air monitor, I have no idea why it showed up. It's shown on the inspection receipt, but the car obviously doesn't have a secondary air system. The inspector definitely had it set to diesel too.

Thanks again everyone for your help!
 
Last edited:

lemoncurd

Veteran Member
Joined
May 24, 2019
Location
Eastern CT
TDI
2013 CJAA GTB2266
Rumor has it that they will be able to detect if a computer has been reprogrammed to force readiness
"yes" but also no, it is just updated software to check the flash count on ECU's. given our cars have been reflashed by VW already because of dieselgate you could easily dismiss a claim for failure on that by pointing fingers back at dieselgate

NY is currently rolling out new inspection machines and software
yes ;) one of which is more than likely a particle meter to sniff out diesel particulates in your exhaust. they will know if your car is deleted (or even has a faulty DPF!), this isnt a whiteboard test anymore people!
 

jetta_tdi12

Member
Joined
Mar 6, 2023
Location
Western NY
TDI
2012 Jetta TDI
Here's another update on this never ending project.

About a month ago now, I finally got all of the parts for the "un-delete" together. I was able to pick up a fairly cheap used exhaust system that I was told was working when it was removed from the car. The DPF and Cats came from a 2011 Golf, but I am unsure of their mileage. Everything else came brand new from VW. I got everything installed on the car and flashed the stock file back onto the computer.

The installation of everything went smoothly. I didn't see anything visually wrong with any of the major components. The worst part was getting the DPF in.

After I got everything back together and started the car, it had a few codes. (I will get the full VCDS autoscan tomorrow and post it so you can see everything.)

P2008 - Intake Manifold Flap electrical malfunction
P2015 - Intake Manifold Flap Position Sensor (Bank 1)
P2BA6 - NOx Emissions Exceeded/SCR Catalyst Malfunction
P1A58 - NOx Catalyst Regeneration Required

I was able to force a standing DPF regen with VCDS and it seemed to work just fine. The regen lasted for about 15 minutes. After that, I tried to force the NOx regen while driving but I could not get it to work. I took the car down the highway at about 70mph and kept it above 2000rpm for almost 2 hours, but none of the values presented by VCDS ever changed, so I don't think that the regen ever happened. I will get the full VCDS autoscan tomorrow and post it so you can see all of the data.

I also noticed while driving that the car tried to do another DPF regen on its own. VCDS: 8B:Aftertreatment status -- PF_Regen:Status:Y,Typ: Pass.

Several of the readiness monitors also ran during my drive and some of them passed, including the Secondary Air monitor. (Still not sure how)

I'm not sure where to go from here. I'm not sure what else to check but I'm starting to think that perhaps the NOx catalyst is faulty.

I am going to try to get it into the dealer in the next week or so to see what they think is wrong here.

If anyone has any advice or thoughts they are greatly appreciated. Thanks again.
 

jetta_tdi12

Member
Joined
Mar 6, 2023
Location
Western NY
TDI
2012 Jetta TDI
Here is the full Autoscan.

Thursday,15,June,2023,14:01:59:10958
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 11 x64
VCDS Version: 23.3.1.0 (x64) HEX-V2 CB: 0.4631.4
Data version: 20230421 DS346.2
www.Ross-Tech.com


VIN: 3VW3L7AJ6CM396115 License Plate:
Mileage: 178460km-110889mi Repair Order:



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


Chassis Type: AJ-VW36 (6N0)
Scan: 01 03 05 08 09 15 17 19 25 2B 2E 37 44 47 56

VIN: 3VW3L7AJ6CM396115 Mileage: 178460km-110889miles

01-Engine -- Status: Malfunction 0010
03-ABS Brakes -- Status: Malfunction 0010
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
15-Airbags -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
25-Immobilizer -- Status: OK 0000
2B-Steer. Col. Lock -- Status: OK 0000
2E-Media Player 3 -- Status: OK 0000
37-Navigation -- Status: Malfunction 0010
44-Steering Assist -- Status: OK 0000
47-Sound System -- Status: OK 0000
56-Radio -- Status: OK 0000
-------------------------------------------------------------------------------
Address 01: Engine (CJA) Labels: 03L-906-022-CBE.clb
Part No SW: 03L 997 030 N HW: 03L 907 309 AA
Component: R4 2.0l TDI G000SG 9983
Revision: 12H14--- Serial number:
Coding: 0050072
Shop #: WSC 87381 042 00000
VCID: 392F3E41E55B3E22085-806C
VINID: 0E69C370745A1937432460411462B28113

4 Faults Found:
011174 - NOx Emissions Exceeded
P2BA6 - 000 - SCR Catalyst Malfunction - MIL ON
Freeze Frame:
Fault Status: 11100000
Fault Priority: 2
Fault Frequency: 1
Reset counter: 255
Mileage: 178178 km
Time Indication: 0
Date: 2017.10.10
Time: 16:29:42

Freeze Frame:
RPM: 874 /min
Speed: 0.0 km/h
Load: 0.0 %
Pressure: 968.0 mbar
Temperature: 9.0°C
Mass Air / Rev.: 275.0 mg/str
Temperature: 14.4°C

006744 - NOx Catalyst
P1A58 - 000 - Regeneration Required
Freeze Frame:
Fault Status: 01100000
Fault Priority: 6
Fault Frequency: 6
Reset counter: 255
Mileage: 178178 km
Time Indication: 0
Date: 2017.10.10
Time: 16:29:42

Freeze Frame:
RPM: 874 /min
Speed: 0.0 km/h
Load: 0.0 %
Pressure: 968.0 mbar
Temperature: 9.0°C
Mass Air / Rev.: 275.0 mg/str
Temperature: 14.4°C

008213 - Intake Manifold Flap Position Sensor (Bank 1)
P2015 - 003 - Implausible Signal - MIL ON
Freeze Frame:
Fault Status: 11100011
Fault Priority: 2
Fault Frequency: 1
Reset counter: 255
Mileage: 178178 km
Time Indication: 0
Date: 2017.10.10
Time: 16:29:42

Freeze Frame:
RPM: 874 /min
Speed: 0.0 km/h
Voltage: 14.29 V
Lambda: 3.9 %
Lambda: 11.8 %
Bin. Bits: 00000000
Voltage: 0.304 V

008200 - Intake Manifold Flap; Bank 1
P2008 - 000 - Electrical Malfunction - Intermittent - MIL ON
Freeze Frame:
Fault Status: 10100000
Fault Priority: 2
Fault Frequency: 48
Reset counter: 255
Mileage: 178260 km
Time Indication: 0
Date: 2017.10.10
Time: 02:55:02

Freeze Frame:
RPM: 2484 /min
Speed: 41.0 km/h
Load: 61.6 %
Load: 94.9 %
Lambda: 99.4 %
Mass Air / Rev.: 810.0 mg/str
Temperature: 67.5°C

Readiness: 1 3 0 0 1

-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104) Labels:. 1K0-907-379-60EC1F.clb
Part No SW: 1K0 907 379 BL HW: 1K0 907 379 BL
Component: ESP MK60EC1 H31 0152
Revision: 00H31001
Coding: B14B400C492B00008D0C02E5921E0042A71000
Shop #: WSC 00066 000 00000
VCID: 7DA7EA51BDF3C20264D-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: 1
Reset counter: 245
Mileage: 178177 km
Time Indication: 0
Date: 2017.09.26
Time: 23:35:01

Freeze Frame:
Count: 2
Count: 2
Count: 29184
Count: 16390
Count: 51456
Count: 1
Count: 255
Count: 0


-------------------------------------------------------------------------------
Address 05: Acc/Start Auth. (J518) Labels:| 5K0-959-434.clb
Part No SW: 5K0 959 434 B HW: 5K0 959 434 B
Component: VWKESSYPQ35GP 085 0902
Revision: 00085000 Serial number: 0160368223 Dataset Number: 5K0116v____ 1609
Coding: 030C0C
Shop #: WSC 00066 000 00000
ASAM Dataset: EV_KESSYPQ35G A02013
ROD: EV_KESSYPQ35G_A02_VW31.rod
VCID: 34310F75CEB9C34ADB3-8060

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 5C0-820-047.clb
Part No SW: 5C0 820 047 AQ HW: 5C0 820 047 AQ
Component: J301 Klimaanlage 0203
Revision: 2001010S Serial number: 00000000849062
Shop #: WSC 00066 000 00000
VCID: 6FBBC019EB9FA092E61-803A

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519) Labels:. 6R0-937-08x-09.clb
Part No SW: 5C0 937 087 E HW: 5C0 937 087 A
Component: BCM25 JLB H3 H66 0257
Revision: B2066001 Serial number: 04371081120849
Coding: 7B994B9A08AB0B0008382000240884C50082502E6000000030A000000000
Shop #: WSC 34770 001 1048576
VCID: 2F3B0019271FE092A61-807A

Subsystem 1 - Part No SW: 6R0 959 801 AF HW: 6R0 959 801 AF Labels: 6R0-959-801.CLB
Component: J386__TSG_FT 004 3464
Serial number: --------------------
Coding: 820000

Subsystem 2 - Part No SW: 6R0 959 802 AF HW: 6R0 959 802 AF Labels: 6R0-959-802.CLB
Component: J387__TSG_BT 004 3464
Serial number: --------------------
Coding: 820000

Subsystem 3 - Part No SW: 5K0 959 591 HW: 5K0 959 591
Component: J245 PS41.022 H09 0007
Serial number: WRH0004HV5R
Coding: 180000

Subsystem 4 - Part No SW: 5K0 959 542 A HW: 5K0 959 542 A
Component: E221__MFL-TAS H09 0013
Serial number: 0029347
Coding: 020000

Subsystem 5 - Part No SW: 6R0 959 811 H HW: 6R0 959 811 H
Component: J388__TSG_HL 004 3464
Serial number: --------------------
Coding: 800000

Subsystem 6 - Part No SW: 6R0 959 812 H HW: 6R0 959 812 H
Component: J389__TSG_HR 004 3464
Serial number: --------------------
Coding: 800000

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags (J234) Labels:| 5K0-959-655.clb
Part No SW: 5C0 959 655 E HW: 5C0 959 655 E
Component: AirbagVW10G 014 0808
Serial number: 003GTM04ZG73 Dataset Number: 160003v____ 0154
Coding: 00003936
Shop #: WSC 00066 000 00000
ASAM Dataset: EV_AirbaVW10SMEVW360 A01023
ROD: EV_AirbaVW10SMEVW360.rod
VCID: 34310F75CEB9C34ADB3-8060

Seat occupied recognition:
Subsystem 1 - Part No SW: 5C6 959 339 A HW: 5C6 959 339 A
Component: BF-Gewichtss. H10 0045
Serial number: 6940000Y120000CJ7S0-
Coding: 303036

Crash sensor for side airbag: driver side:
Subsystem 2 - Part No SW: 5K0 959 354 HW: 5K0 959 354
Component: S.Sens.Fahr.V H01 ----
Serial number: 3572MSME0C2C136BZZZ/

Front Passenger's Side Airbag Crash Sensor:
Subsystem 3 - Part No SW: 5K0 959 354 HW: 5K0 959 354
Component: S.Sens.Beif.V H01 ----
Serial number: 3582MSME3768756AZZZ3

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: 3516KSME1F5B4517ZZZ

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: 3526KSME76075E17ZZZ.

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: 3556LSME6B1A4E17ZZZ5

Crash sensor for front airbag: front passenger side:
Subsystem 7 - Part No SW: 5K0 959 659 A HW: 5K0 959 659 A
Component: F.Sens.Beif H02 ----
Serial number: 3566LSME54555317ZZZU

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments (J285) Labels:| 5K0-920-xxx-17.clb-SRI1
Part No SW: 5C6 920 951 A HW: 5C6 920 951 A
Component: KOMBI H04 0604
Serial number: 00000000000000
Coding: 270A01
Shop #: WSC 00066 000 00123
ASAM Dataset: EV_Kombi_UDS_VDD_RM09 A04114
ROD: EV_Kombi_UDS_VDD_RM09_004_VW32.rod
VCID: 290FEE01197B8EA2785-807C

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533) Labels:. 6N0-909-901-6R.clb
Part No SW: 6N0 909 901 HW: 5C0 937 087 A
Component: GW-K-CAN TP20 H66 0257
Revision: B2066001
Coding: 102200
Shop #: WSC 34770 001 1048576
VCID: 70B9C365FAA1BF6AFFB-8024

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 H04 0604
Serial number:
Coding: 000007
Shop #: WSC 00066 000 00123
ASAM Dataset: EV_Immo_UDS_VDD_RM09 A03009
ROD: EV_Immo_UDS_VDD_RM09_VW21.rod
VCID: 6A8DD10DDCFD45BAB1F-803E

No fault code found.

-------------------------------------------------------------------------------
Address 2B: Steer. Col. Lock (J764) Labels:* 5K0-905-861.clb
Part No SW: 5K0 905 861 A HW: 5K0 905 861 A
Component: ELV-PQ35 H20 0230
Revision: 00000000 Serial number: 11000273957004
Coding: 4100000000000000
Shop #: WSC 00066 790 50316
ASAM Dataset: EV_ELVMarquMPVW36X A01001
ROD: EV_ELVMarquMPVW36X.rod
VCID: 2E051D1D2095E99AAD7-807A

No fault code found.

-------------------------------------------------------------------------------
Address 2E: Media Player 3 (J650) Labels:. 5N0-035-342.lbl
Part No SW: 5N0 035 342 E HW: 5N0 035 342 E
Component: SG EXT.PLAYER H13 0240
Revision: A1001003 Serial number: 7661860316
Coding: 020000
Shop #: WSC 00066 000 00000
VCID: 290FEE0119FB8EA2785-807C

No fault code found.

-------------------------------------------------------------------------------
Address 37: Navigation (J794) Labels:| 1K0-035-27x-37.clb
Part No SW: 1K0 035 274 B HW: 1K0 035 274 B
Component: RNS315-NAR H35 0265
Serial number: VWZAZ2M4208672
Coding: 04090001010006000000100A
Shop #: WSC 01383 790 50316
ASAM Dataset: EV_RNS315NARV2UDS A01004
ROD: EV_RNS315NARV2UDS.rod
VCID: 2313FC297B5754F2329-8076

Data carrier:
Subsystem 1 - Part No: 3AA 919 866 B
Component: NAR_V2 0002

2 Faults Found:
1048669 - Tuner for Satellite Radio
B11CF 53 [009] - Deactivated
Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 7
Fault Frequency: 1
Reset counter: 203
Mileage: 178177 km
Date: 2023.05.06
Time: 23:35:01

1048642 - Internal Control Module Memory Check Sum Error
B2000 42 [009] - General Memory Failure
[ECU defect data memory failure]
Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 4
Fault Frequency: 1
Mileage: 178150 km
Date: 2023.02.26
Time: 16:49:20


-------------------------------------------------------------------------------
Address 44: Steering Assist Labels: 1K0-909-14x-GEN3.clb
Part No: 1K0 909 144 P
Component: EPS_ZFLS Kl. 70 3305
Revision: 00H22000
Shop #: WSC 02069 000 90108
VCID: 372B3879D34F2852FE1-8062

No fault code found.

-------------------------------------------------------------------------------
Address 47: Sound System (R12) Labels: 5K0-035-456.clb
Part No SW: 3T0 035 456 B HW: 3T0 035 456 B
Component: KonzernAmp10K H06 0362
Revision: -------- Serial number: BP225311013069 Dataset Number: 560050v____ 1604
ASAM Dataset: EV_AudioVerst10KanalSTT3 S01001
ROD: EV_AudioVerst10KanalSTT3.rod
VCID: 303903653AA1FF6ABFB-8064

No fault code found.

End----------(Elapsed Time: 01:25, VBatt start/end: 14.1V/14.0V)-----------
 

KERMA

Vendor , w/Business number
Joined
Sep 23, 2001
Location
here
TDI
99 beetle and 04 jetta
I would have to research more to be 100% certain, but

Looks to me like the intake flap faults are preventing nox regen. A little more info about this:

The nox regen operating mode requires active use of the o2 sensors. The o2 sensor can't be tested "ok" (technical term is "FID released") with the intake swirl flap unplugged. This "FID release" for the lambda sensor(s) drift test is a prerequisite for releasing Noxcat regen. This is because of the nature of your "delete" tune, which didn't actually delete the nox cat (just turned off some aspects of diagnostics, "out of sight out of mind, no problems here" lol)

This is not normally an issue, because most guys don't "undelete". Wouldn't be an issue if 1) intake flap was plugged in, allowing release of the appropriate recalibrations/adaptations to satisfy proper lambda sensor operation, which is a noxcat regen prerequisite condition
or 2) proper delete tune had actually deleted the affected systems, (instead of just fooling diagnostics) freezing all drift compensation in place at the last "known good" value. Then it would have just picked up again where it left off, no biggie.

Bottom line, plug in the swirl flapper motor. (this may also be a prerequisite in itself, but I would have to research more if I wanted to be certain)
Possible workaround, unplug the MAF, forcing reset of the maf/o2 sensor drift compensation when the DTC for unplugged maf sets.
another possible workaround, unplug the o2 sensor(s) for the same reason. Unplugging those sensors resets the learning. (FWIW, kerma tune automatically resets those every startup, so IOW a kerma tune would fix your problem 100%, sorry for the shameless plug lol)

But the easiest way may be simply plugging in the flapper motor, then enter the following Coding 2 logins:
10008 - resets Fuel meanvalue adaptation
31700 - resets LP EGR learning offset
30605 - resets DPF d/p sensorlearning offset
10012 - DPF regen during driving - noxcat regen may initialize on its own after dpf regen is finished, noxcat can't regen if soot load is too high

Also, try cleaning or replacing the lambda sensors.

Sorry if this is a bit of spitballing. It's my best guess of what may be wrong, and what may help you
 

jetta_tdi12

Member
Joined
Mar 6, 2023
Location
Western NY
TDI
2012 Jetta TDI
We're making slow but steady progress here...

The car never went to the dealer - they basically just told me to 'drive it' which wasn't very helpful...

I ended up diagnosing the P2008 and P2015 codes myself. Turns out the intake flap motor was failed internally so I ended up having to replace the whole intake manifold. Cleared the codes and test drove and they didn't come back.

I ended up having to drive the car about 300 miles over one weekend so that worked out perfectly for doing the NOx regen. It took about 1hr and 15 mins at a constant 70mph. The NOx value shown by VCDS dropped to 1.9 from 13.29, which shut the DPF light off and eventually the MIL too.

When I was on my way home the MIL came back on. I checked the codes when I got home and had:

P2002 - Particulate Trap Bank 1: Efficiency Below Threshold
P0401 - EGR System: Insufficient Flow

From what I have seen these 2 codes together usually indicate a cracked DPF. There is also soot in the tailpipe now which also points to a failed DPF.

I guess that's just the 'way she goes' with used parts... but I'd like to be certain the DPF bad before I pick up a new one.

Is there anything else I can check to confirm the DPF is bad?

Thanks again for all of the help so far -- it is greatly appreciated.
 

jetta_tdi12

Member
Joined
Mar 6, 2023
Location
Western NY
TDI
2012 Jetta TDI
Well I was finally able to get the Jetta inspected this week... and it passed too!

I ended up getting the DPF replaced by a local VW dealer free of charge as it was still under TDI warranty.

When I bought the car I looked up the VIN with VW so I knew that it had TDI extended warranty for another 2k miles or until September of this year. I didn't think they would accept it though because the car had obviously been modified.

Sure enough, they said they would replace the DPF and EGR filter at no cost to me. Since then it has been running great and seems to be doing regens normally.

Thanks again everyone for all of the information and tips you have shared. This has been one hell of a project but it seems to be finished now.

 

blacksi

Well-known member
Joined
Nov 3, 2008
Location
Dayton
TDI
Jetta
Well I was finally able to get the Jetta inspected this week... and it passed too!

I ended up getting the DPF replaced by a local VW dealer free of charge as it was still under TDI warranty.

When I bought the car I looked up the VIN with VW so I knew that it had TDI extended warranty for another 2k miles or until September of this year. I didn't think they would accept it though because the car had obviously been modified.

Sure enough, they said they would replace the DPF and EGR filter at no cost to me. Since then it has been running great and seems to be doing regens normally.

Thanks again everyone for all of the information and tips you have shared. This has been one hell of a project but it seems to be finished now.

Wanna sell that downpipe???
 
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