Posted by Peter Holland on November 28, 2017, 12:38 pm
Year of Manufacture *: 2011 Engine Size and Code *: 1600 ( Optional ) Scanner Used: VCDS ( Optional) Fault Codes: 16848 (P2458) DPF regeneration duration.
I can't seem to be able to get this car to carry out a DPF regeneration, even though, as far as I can determine, the soot level and pressures are within acceptable limits.
Tuesday,28,November,2017,10:56:31:39618 VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x64 VCDS Version: 17.8.0.1 (x64) Data version: 20170721 DS276.2 www.Ross-Tech.com
Address 01: Engine Labels: 03L-906-023-CAY.clb Control Module Part Number: 03L 906 023 ML HW: 03L 907 425 C Component and/or Version: 1,6l R4 CR td H43 8853 Software Coding: 08114014032500080000 Work Shop Code: WSC 01357 011 00200 ASAM Dataset: EV_ECM16TDI02103L906023ML 003004 (VW36) ROD: EV_ECM16TDI02103L906023KB.rod VCID: 7CF3F25CF771A5A6D6-8028 1 Fault Found:
16848 - Diesel Particulate Filter P2458 00 [173] - Regeneration Duration MIL ON - Confirmed - Tested Since Memory Clear Freeze Frame: Fault Status: 00000001 Fault Priority: 2 Fault Frequency: 2 Mileage: 66347 km Date: 2077.14.06 Time: 10:37:26
Engine speed: 0.00 /min Normed load value: 0.0 % Vehicle speed: 0 km/h Coolant temperature: 80 °C Intake air temperature: 12 °C Ambient air pressure: 1000 mbar Voltage terminal 30: 12.085 V Unlearning counter according OBD: 40 Particle filter: soot mass measured-MASS_SOOT_PHY_PF: -5.01 g Particle filter: soot mass calculated-MASS_SOOT_SIM_PF: 11.54 g Particle filter kilometers since last regeneration_1-DIST_RGN_ENVD_H: 434 km Counter for regeneration time of diesel particle filter-T_INT_RGN_ACT_INI_PF_ENVD_H: 12596.0189 s Particle filter: difference pressure-DIP_PF: 4.98 hPa Particle filter: offset for differential press.-DIP_PF_AD[0]: -3.07 hPa Service regeneration: Release conditions 3-FRF_STATE_RGN: 9
Readiness: 1010 0000Tuesday,28,November,2017,12:00:13:39618 VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x64 VCDS Version: 17.8.0.1 (x64) Data version: 20170721 DS276.2 www.Ross-Tech.com
VIN: WVWZZZ1KZBW240174 License Plate: WN11 AEA
Address 01: Engine (03L 906 023 ML)
11:59:56 IDE00167 Exhaust temperature 1 bank 1 128.2 °C IDE00169 Exhaust temperature 2 bank 1 127.6 °C IDE00420-ENG101443 Service regeneration: current duration-T_RGN_ACT_PF 0.0000 s IDE00423-ENG103230 Service regeneration: Release conditions 2-Binary 32 Bit 11111111 11111110 10111111 11011111 IDE00425-ENG102682 Service regeneration: phase-STATE_RGN_PF 10 IDE00427-ENG101722 Particle filter: difference pressure-DIP_PF 7.21 hPa IDE00430-ENG102682 Particle filter: field regeneration request status-STATE_RGN_PF 10 IDE00434-ENG102050 Particle filter: soot mass calculated-MASS_SOOT_SIM_PF 27.82 g
The car is in limp home. If I go in to adaptions, channel 2B - Service regen whilst driving, I can then drive the car without loss of power. I've driven it for around 20 minutes on main roads but so far I still have the three engine and DPF warning lights on and it looks like (from the data above) its not initiating a regen.
When I go into that channel 2B, it displays stored and new data as 00 00. I'm not sure if I'm entering the new data correctly, but it accepts 01 00 and displays this in stored data as 00 01. I'm not sure if this correct?
go into adapations or basic settings (i can not rember which one with out VCDS connected to the car)
and tell it that you have a new dpf its some thing like clear dpf counter- adaption ?? AND SET SOOT TO 0.00
this should get you out of limp once the DTC's are cleared.
run the engine for a minuite or 2 and then go back into a adaptions and dpf counter/ adaptiation and manualy change the soot counter to 27 g and save it.
you should be able to force regen the car as you have previously tried but you will need to drive it on a dual carrage way at a fairly constant speed for 10 miles or so untill the DPF light goes out ( the DPF LIGHT will come on if you are successful in initiateing a regen and it will go out when the car is happy)
if like me a dual carrage way is 20 mins drive from your site, wait untill you are 1/2 mile from the dual carrage way before starting the process.
( When I go into that channel 2B, it displays stored and new data as 00 00. I'm not sure if I'm entering the new data correctly, but it accepts 01 00 and displays this in stored data as 00 01. I'm not sure if this correct? )
Many thanks for that Andrew. Luckily we're based a couple of minutes drive from a dual carrage way so after following your advise all seems good.
I still don't really understand why it was trying to regenerate if the ash level was too low? I must admit, I've still got a lot to learn about DPFs. If I understand it correctly, soot is produced during the combustion process but ash is produced if oil is burnt, ie, if the incorrect grade of oil is used? So, assuming that ash and soot are two different by-products, why does a low ash content prevent the DPF regenerating?
on November 28, 2017, 4:32 pm, in reply to "