2013 Jetta TDI - 006744 - NOx Catalyst P1A58 - 000 - Regeneration Required - measured zoot zero

[kraftwerkturbo]

Have the above code. Can only find info on "DPF regen". But read that measured zoot should be 45 or below for driving regen and 35-40 for stationary regen (group 241 or 108). Tried security login 27971 for stationary regen, basic settings, regen DPF while standing. Getting Error.

Is "DPF regen" different from "NOx cat regen"?

If so: how do do a NOx cat regen (as code requires)?
If not: what can I do the run regen even so measured zoot values don't seem to 'qualify', yet, getting NOx code?

 

[Seatman]

There's some info on rosstech. Not all cars can do a staitionary regen, have to be on the move.

P1A58/006744 - NOx catalytic converter: Regeneration required - Ross-Tech Wiki

wiki.ross-tech.com

 

[Dannyboy]

NOx regen and DPF regen are two different modes but both are very similar in the way they work. However NOx regen gets the exhaust much hotter than usual dpf regen.

"NOX regen while driving" should be under adaptations on VCDS. It's been awhile so not 100%.
Make sure there's no emissions or engine faults (other than Nox regen required code) make sure you have over half a tank of fuel and a good straight stretch of road that has a speed limit over 50 mph. Last time in needed to do one on a 2010 golf it took 30 mins to complete.

 

[kraftwerkturbo]

NOx regen and DPF regen are two different modes but both are very similar in the way they work. However NOx regen gets the exhaust much hotter than usual dpf regen.

"NOX regen while driving" should be under adaptations on VCDS. It's been awhile so not 100%.
Make sure there's no emissions or engine faults (other than Nox regen required code) make sure you have over half a tank of fuel and a good straight stretch of road that has a speed limit over 50 mph. Last time in needed to do one on a 2010 golf it took 30 mins to complete.

Will get full scan and see if I find "NOX regen" somewhere else (not in basic settings, but adaptions?). Was hoping to have 'stationary' option as with DPF regen so I can do the regen this weekend (and not having to drive 1 hour in 6 inches of snow at 2000 rpm).

 

[kraftwerkturbo]

There's some info on rosstech. Not all cars can do a staitionary regen, have to be on the move.

P1A58/006744 - NOx catalytic converter: Regeneration required - Ross-Tech Wiki

wiki.ross-tech.com

Unfortunately, no instruction how to do NOX regen on 2013 Jetta TDI in the above Rosstech link.

 

[Seatman]

Looks like you need to do a long drive, it sounds like the car isn't being driven long enough for the cat to do it's regen too

If you glance through this thread it talks about needing a long drive

DPF Light and pulled a NOx Fault - Need Advice ASAP

DPF Light and pulled a NOx Fault - Need Advice ASAP Hello everyone, Had a warning light come on the little muffler looking symbol for the DPF. I hooked up a scanner and pulled only a P1A58 code. 2012 Jetta TDI 2.0L w/ emission update done in May 2019 P1A58/006744 - NOx catalytic converter...

forums.tdiclub.com

And this this link suggests 40-75mph, needs the engine fully warmed up then the actual regen takes 40-50 minutes of sustained driving. That's for the cat regen.

https://static.nhtsa.gov/odi/tsbs/2019/MC-10169515-0001.pdf

But it also sounds like you're having to crappy weather to manage it just now.

 

[kraftwerkturbo]

Friday,12,January,2024,14:23:14:03761

VCDS -- Windows Based VAG/VAS Emulator Running on Windows 11 x64

VCDS Version: 23.11.0.0 (x64)

Data version: 20231027 DS351.0

www.Ross-Tech.com





VIN: 3VWPL7AJ2DM615266 License Plate:





Chassis Type: AJ-VW36 (7N0)

Scan: 01 02 03 05 08 09 15 16 17 19 25 2B 2E 37 42 44 46 4F 52 56

62 72



VIN: 3VWPL7AJ2DM615266 Mileage: 204980km-127368miles



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

15-Airbags -- Status: OK 0000

16-Steering wheel -- 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

42-Door Elect, Driver -- Status: OK 0000

44-Steering Assist -- Status: OK 0000

46-Central Conv. -- Status: OK 0000

4F-Centr. Electr. II -- Status: OK 0000

52-Door Elect, Pass. -- Status: OK 0000

56-Radio -- Status: OK 0000

62-Door, Rear Left -- Status: OK 0000

72-Door, Rear Right -- Status: OK 0000



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

Address 01: Engine (CJA) Labels: 03L-906-022-CBE.clb

Part No SW: 03L 997 030 E HW: 03L 907 309 AA

Component: R4 2.0l TDI G000AG 9983

Revision: 12H15--- Serial number:

Coding: 0050078

Shop #: WSC 45097 002 1048576

VCID: 306E9D27A32DE21173-8064

VINID: 0E69E070745A094746045086182432849F



1 Fault Found:

006744 - NOx Catalyst

P1A58 - 000 - Regeneration Required

Freeze Frame:

Fault Status: 01100000

Fault Priority: 6

Fault Frequency: 2

Reset counter: 255

Mileage: 204983 km

Time Indication: 0

Date: 2018.06.03

Time: 20:21:52



Freeze Frame:

RPM: 828 /min

Speed: 0.0 km/h

Load: 0.0 %

Pressure: 968.0 mbar

Temperature: 0.9°C

Mass Air / Rev.: 270.0 mg/str

Temperature: 7.2°C



Readiness: 0 0 0 1 1



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

Address 02: Auto Trans Labels: 02E-927-770.clb

Part No SW: 02E 300 062 B HW: 02E 927 770 AL

Component: GSG DSG AG6 512 9430

Revision: 05551213 Serial number: 00001206151623

Coding: 0000020

Shop #: WSC 00066 000 00000

VCID: 142631B737753E3177-8040



No fault code found.



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

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: 114B600C492300FF880D06EA921F0042B70000

Shop #: WSC 00066 000 00000

VCID: 7DF07413E4FFDF79A8-8028



No fault code found.



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

Address 05: Acc/Start Auth. (J518) Labels:| 5K0-959-434.clb

Part No SW: 5K0 959 434 B HW: 5K0 959 434

Component: VWKESSYPQ35GP 085 0902

Revision: 00085000 Serial number: 0169724323 Dataset Number: 5K0116v____ 1K07

Coding: 030C0C

Shop #: WSC 00066 000 00000

ASAM Dataset: EV_KESSYPQ35G A02013

ROD: EV_KESSYPQ35G_A02_VW31.rod

VCID: 346691379F35DE3117-8060



No fault code found.



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

Address 08: Auto HVAC (J301) Labels:| 3C8-907-336.clb

Part No SW: 7N0 907 426 BH HW: 7N0 907 426 BH

Component: AC Manuell H20 0505

Revision: 00001018

Coding: 0010002002

Shop #: WSC 00066 000 00119

ASAM Dataset: EV_ACManueBHBVW36X A01010

ROD: EV_ACManueBHBVW36X_VW36.rod

VCID: 7BF47A0BF2EBD14996-802E



No fault code found.



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

Address 09: Cent. Elect. (J519) Labels:. 1K0-937-08x-09.clb

Part No SW: 5K0 937 084 J HW: 5K0 937 084 J

Component: BCM PQ35 B 021 3068

Revision: BG021001

Coding: 6F380E1F802F3EC4008800C17000004449000086575D05F064802020A040

Shop #: WSC 45097 002 1048576

VCID: 3978A003B0572359C4-806C



Subsystem 1 - Part No: 5K1 955 119 Labels: 1KX-955-119.CLB

Component: Wischer 03081 26 0512

Coding: 009795



No fault code found.



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

Address 15: Airbags (J234) Labels:| 5K0-959-655.clb

Part No SW: 5C0 959 655 M HW: 5C0 959 655 M

Component: AirbagVW10G 014 0726

Serial number: 003L4R0062S5 Dataset Number: 1KM003v__B_ 0047

Coding: 00004E42

Shop #: WSC 00066 790 00083

ASAM Dataset: EV_AirbaVW10SMEVW360 001026

ROD: EV_AirbaVW10SMEVW360.rod

VCID: 3C76B917B7651671DF-8068



Seat occupied recognition:

Subsystem 1 - Part No SW: 1KM 959 339 B HW: 1KM 959 339 B

Component: BF-Gewichtss. 006 0001

Serial number: ---0000R--00005AJA00



Crash sensor for side airbag: driver side:

Subsystem 2 - Part No SW: 1KM 955 557 HW: 1KM 955 557

Component: S.Sens.Fahr.V H02 ----

Serial number: 3572MSME68564571ZZZZ



Front Passenger's Side Airbag Crash Sensor:

Subsystem 3 - Part No SW: 1KM 955 557 HW: 1KM 955 557

Component: S.Sens.Beif.V H02 ----

Serial number: 3582MSME34584571ZZZV



Rear Side Airbag Crash Sensor (on driver's side):

Component: S.Sens.Fahr.H --- ----

Serial number: 3511HSME506F0F2EZZZ



Passenger side rear thorax airbag crash sensor:

Component: S.Sens.Beif.H --- ----

Serial number: 3521HSME3E710E2EZZZ.



Crash sensor for front airbag: driver side:

Component: F.Sens.Fahr --- ----

Serial number: 35527SME0372002EZZZ4



Crash sensor for front airbag: front passenger side:

Component: F.Sens.Beif --- ----

Serial number: 35627SME7242012EZZZ9



No fault code found.



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

Address 16: Steering wheel (J527) Labels:| 5K0-953-569.clb

Part No SW: 5K0 953 521 BR HW: 5K0 953 569 E

Component: LENKS.MODUL 014 0140

Revision: FF010041 Serial number: 20120712200688

Coding: 100A140000

Shop #: WSC 00066 790 00083

ASAM Dataset: EV_SMLSNGVOLWSXS A01004

ROD: EV_SMLSNGVOLWS.rod

VCID: 7DF07413ECFFDF79A8-8028



Multifunction steering wheel control module:

Subsystem 1 - Part No SW: 5K0 959 542 A HW: 5K0 959 542 A Labels: 3C8-959-537.CLB

Component: E221__MFL-TAS H09 0013

Coding: 820000



No fault code found.



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

Address 17: Instruments (J285) Labels:| 5K0-920-xxx-17.clb-SRI1

Part No SW: 5K0 920 973 C HW: 5K0 920 973 C

Component: KOMBI H05 0705

Serial number: 00000000000000

Coding: 270F01

Shop #: WSC 00066 000 00119

ASAM Dataset: EV_Kombi_UDS_VDD_RM09 A04716

ROD: EV_Kombi_UDS_VDD_RM09_004_VW32.rod

VCID: 316898236027EB197C-8064



No fault code found.



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

Address 19: CAN Gateway (J533) Labels:. 7N0-907-530-V2.clb

Part No SW: 7N0 907 530 T HW: 7N0 907 530 K

Component: J533 Gateway H40 1632

Revision: H40 Serial number: 02061201290404

Coding: 352002

Shop #: WSC 00066 000 00000

VCID: 4188C8E3D8877B998C-8014



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 H05 0705

Serial number:

Coding: 000007

Shop #: WSC 00066 000 00119

ASAM Dataset: EV_Immo_UDS_VDD_RM09 A03709

ROD: EV_Immo_UDS_VDD_RM09_VW21.rod

VCID: 6ADA4F4F8D7158C17D-803E



No fault code found.



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

Address 2B: Steer. Col. Lock (J764) Labels:* 5K0-905-861.clb

Part No SW: 5K0 905 861 B HW: 5K0 905 861 B

Component: ELV-PQ35 H20 0240

Revision: 00000000 Serial number: 12000142695005

Coding: 4900000000000000

Shop #: WSC 00066 790 50316

ASAM Dataset: EV_ELVMarquMPVW36X A01001

ROD: EV_ELVMarquMPVW36X.rod

VCID: 2F6C9E5B7613FDE96A-807A



No fault code found.



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

Address 2E: Media Player 3 (J650) Labels:. 5N0-035-342.lbl

Part No SW: 5N0 035 342 F HW: 5N0 035 342 F

Component: SG EXT.PLAYER H18 0530

Revision: A1001003 Serial number: 7662932362

Coding: 020100

Shop #: WSC 00066 000 00000

VCID: 2A5A8F4F45F198C1BD-807E



No fault code found.



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

Address 37: Navigation (J794) Labels:| 1K0-035-27x-37.clb

Part No SW: 1K0 035 274 D HW: 1K0 035 274 D

Component: RNS315-NAR H53 0319

Serial number: VWZAZ2M4241847

Coding: 04000401040007000000100A

Shop #: WSC 01383 790 50316

ASAM Dataset: EV_RNS315NARV2UDS 001705

ROD: EV_RNS315NARV2UDS.rod

VCID: 25407C7324EFB7B990-8070



Data carrier:

Subsystem 1 - Part No: 3AA 919 866 B

Component: NAR_V3_(0037) 0037



1 Fault Found:

1048669 - Tuner for Satellite Radio

B11CF 53 [00001001] - Deactivated

Confirmed - Tested Since Memory Clear

Freeze Frame:

Fault Priority: 7

Fault Frequency: 1

Reset counter: 171

Mileage: 202648 km

Date: 2023.12.09

Time: 16:54:41





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

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 0501

Revision: 13110009 Serial number: 0005190602

Coding: 0004B5

Shop #: WSC 01383 790 50316

ASAM Dataset: EV_TSGFPQ35BRFVW46X A04001

ROD: EV_TSGFPQ35BRFVW46X_VW36.rod

VCID: 5BB41A8B522B3149F6-800E



Slave Driver:

Subsystem 1 - Part No SW: 3C0 959 703 C HW: 3C0 959 795 D Labels: 1K0-959-70X-GEN4.CLB

Component: J388__TSG-HL 008 1509

Serial number: 00000006984709

Coding: 000490



No fault code found.



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

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: 377CA63B4643352932-8062



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 K

Component: EZE_2 H40 1632

Revision: H40 Serial number: 02061201290404

Coding: 050B0500

Shop #: WSC 00066 000 00000

VCID: 6FEC5E5BBE93BDE92A-803A



Subsystem 1 - Part No SW: 8R0 959 591 A HW: 8R0 959 591

Component: J245EE20SKB13 H03 0220

Serial number: 0123456789ABCDEFGHIJ



Subsystem 2 - Part No SW: 8R0 959 591 A HW: 8R0 959 591

Component: J394EE20SKB13 H03 0220

Serial number: 0123456789ABCDEFGHIJ



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 0501

Revision: 15110009 Serial number: 0005146292

Coding: 0004B4

Shop #: WSC 01383 790 50316

ASAM Dataset: EV_TSGBPQ35BRFVW46X A04001

ROD: EV_TSGBPQ35BRFVW46X_VW36.rod

VCID: 5CB6199757253671FF-8008



Slave Passenger:

Subsystem 1 - Part No SW: 3C0 959 704 C HW: 3C0 959 794 D Labels: 1K0-959-70X-GEN4.CLB

Component: J389__TSG-HR 008 1509

Serial number: 00000006896914

Coding: 000490



No fault code found.



End-------------------------(Elapsed Time: 03:29)--------------------------

 

[kraftwerkturbo]

There's some info on rosstech. Not all cars can do a staitionary regen, have to be on the move.

P1A58/006744 - NOx catalytic converter: Regeneration required - Ross-Tech Wiki

wiki.ross-tech.com

Looks NOx regen only with driving.
Possible that it clears itself IF taken on a long drive? Or does it have to be 'activated' via Rosstech in Adaption?

 

[Seatman]

Looks NOx regen only with driving.
Possible that it clears itself IF taken on a long drive? Or does it have to be 'activated' via Rosstech in Adaption?

It sounds like it's a long drive only for the cat, first it has to reach a high enough temp then it should start burning the stuff up.

 

[KERMA]

Is your coolant getting up to full temperature?
A bad thermostat can preclude nox regen.
(and yes you must be driving for nox regen to occur)

 

[oilhammer]

If the coolant drops below about 90C, it won't ever do the deNOX catalyst regen. Drive it and see.... these often need thermostats to allow a fix. You can initiate a manual regen while driving, but it will fail if the coolant temp isn't sufficient.

 

[Arrbees]

Made an account just to reply in layman's terms here.
There's two separate regens. The DPF regen is the most common one. Usually you may hear the fans running and get a nice power boost during the DPF regen. It's pretty brainless and requires no effort.
The cat also regens as others have already stated, which I don't recall seeing in the car's manual anywhere BTW. This is a much less common regen and I think my first one was needed well into the 4th year I owned the car since I don't drive much.
You may have heard the high fan cycle often for a couple days. It may be going off and on in stop and go traffic. You probably have the cheese grater light on the dash, meaning it's been trying to regen the cat and failed several times likely due to the vehicle being shut off.
That simply means it's time for a nice long drive on the highway. Plan to drive about 15 to 25 continuous minutes one way. Seems to work best if you can go about 70mph although there's no need to exceed the speed limit if that's not possible since it will happen eventually anyway.
No scan tool or special process is needed. Although it is handy to have one plugged to ensure the coolant temp gets high enough if not you may need to replace the thermostat, which I hear can be a common problem on the MK6 TDIs plus it's in an absolutely terrible location (yay). If there's an issue with the thermostat in winter you may be able to employ radiator blocking as a temporary work around until it's warm enough to tear the whole front of the engine bay out to get to the thermostat.
Anyway, drive on the highway after the vehicle is at operating temperature until the cheese grater light goes out. If it comes back on the next day do it again. After my most recent cat regen I think it's probably ideal to continue driving for at least 20 minutes after the light goes out to avoid having it come back on.

 

[kraftwerkturbo]

Want to do the NOx regen while driving today. What are the securit codes? I think the NOx is in Adaption (while the DPF is in in another section)?

 

[kraftwerkturbo]

Entered the sec code 12233 in adaption, block 18 (NOx regen). Entered 1 in "new value", "Test", Save. Then drove at 2200 rpm, 5th gear,. 64 mph steady foreever (more than 50 min). Don't know what the starting values were, but it settled for 3.27 NOx load and 3.0 calculated Soot value. Dash warning light and error code gone.

Not impressed with the process. Can't they show 'progress'? What is the end value supposed to be? Did it even work?

 

[JonA]

I know this is an older thread but I saw this info in OBDEleven to check NOX regen status @kraftwerkturbo: under Engine - live data - channel 104 - the block 1 value (if I recall correctly) changes to 0x0FF02 when the NOX regen is done. Will take a screenshot and update this post later for future visitors.

Was just poking around for further info on the NOX regen because MVB 104.1 flipped through a couple values for me, from 0x0FF20, ending at 0x0FF01 and I'm wondering what that means... Going to give it another go tonight and hopefully it will flip to 0x0FF02 finally...

 

[oilhammer]

I have found that those MVB 104/1 values don't seem to coincide with what you'd expect. Because I've had them get to '02' and you think it has finished, and then the next day the warning lamp has returned.... then doing nothing but driving it and the warning lamp goes out, and all the readiness is set.

So....

But I always, ALWAYS, drive the car and monitor the coolant temp. Because a marginal thermostat often causes this. There is a TSB about it. If it can't stay 92C+, it is bad. The TSB says it must not go below 87C, but I just know after replacing the thermostat they are generally able to stay well above that.

 

[KERMA]

Was just poking around for further info on the NOX regen because MBV 104.1 flipped through a couple values for me, from 0x0FF20, ending at 0x0FF01 and I'm wondering what that means...

0x0FF20 is SOX regen (Bit 5 active) 0010 0000b

 

[JonA]

I have found that those MVB 104/1 values don't seem to coincide with what you'd expect. Because I've had them get to '02' and you think it has finished, and then the next day the warning lamp has returned.... then doing nothing but driving it and the warning lamp goes out, and all the readiness is set.

So....

But I always, ALWAYS, drive the car and monitor the coolant temp. Because a marginal thermostat often causes this. There is a TSB about it. If it can't stay 92C+, it is bad. The TSB says it must not go below 87C, but I just know after replacing the thermostat they are generally able to stay well above that.

As always, very much appreciate your input oilhammer! Will be sure to monitor that when I give it another go.

0x0FF20 is SOX regen (Bit 5 active) 0010 0000b

Thank you KERMA! Based on that, I'm guessing that I didn't let the NOX regen cycle fully finish despite running at the specified speed/RPM for 50+ mins. Is there a legend somewhere that'll help me decode the other values?

 

[KERMA]

Need advice on my 1st NOx regen - CJAA

I've had a 2011 Jetta TDI that has had the P1A58 code for NOx regen since I got it a year ago. I finally replaced the thermostat that wasn't reading high enough for the regen to occur. I took it out for an hour long highway drive where I initiated the regen cycle in VCDS when coolant temp was...

forums.tdiclub.com

that FFXX number corresponds to the state bit that's set in the operating mode message bit mask. (1 = "bit set") That bitmask is a 32 bit message but I'll show a few of these in a truncated (8 bit) version. These are also what you'll see in the "DPF st" display in polar fis.

FF01 = bit 0 active (0000 0001) = operating mode 0 = non regen mode aka "normal mode"

FF02 = Bit 1 active (0000 0010) = operating mode 1 = DPF regen mode

FF04 = Bit 2 active (0000 0100) = operating mode 2 = DPF regen mode 2 - "DPF regen heating mode" for additional heatup when at an idle etc.

FF10 = Bit 4 active (0001 0000) = operating mode 4 = nox regen mode, meaning nox regen is occurring

So, when you see FF10 in MVB 104, it indicates nox regen happening. It should only last a few seconds, maybe 10-20 seconds, then switch back to FF01. It will only happen at relatively steady state conditions, like cruising on the highway or around town at relatively steady speed with no gear shifts.

If you have the "nox regen required" fault code even after seeing several "FF10" to briefly appear in MVB 104.1 then likely the ecu is "requesting" to enter FF10 but some prerequisite condition isn't giving a full release of the operating state. Like Oilhammer said, the thermostat is a very common reason.

NOx regen and sox regen use what's known as a "rich mode" where a/f ratio is tightly monitored and controlled using maf/o2 sensor readings (exactly like a gasser lambda control) during late post injection. So one of those sensors, or an egt sensor, being on the fritz will also lock you out of nox regen.

 

[JonA]

Amazing, somehow managed to avoid finding your post in all my searching, ha. Thanks so much, going to read through that thread later tonight. How did you learn this?!

Edit: forgot who I was talking to