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Thread: 2.0 Diesel 190 DPF Troubleshooting

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  1. Thread: 2.0 Diesel 190 DPF Troubleshooting 
    #1
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    Doing a scan yesterday after some coding with VCDS brought up the following error code and measure values from the DPF (no amber DPF warning light on the dash):

    ---------------------------------------------------------------------------------
    Monday,11,April,2022,18:21:34
    Mileage: 113739km-70674miles

    1 Fault Found:
    19226 - Particulate Trap Bank 1
    P2002 00 [101] - Efficiency Below Threshold
    Not Confirmed - Tested Since Memory Clear
    Freeze Frame:
    Fault Status: 00000001
    Fault Priority: 2
    Fault Frequency: 1
    Mileage: 113721 km
    Date: 2022.04.09
    Time: 09:51:43


    Engine RPM: 1217.50 /min
    Normed load value: 26.7 %
    Vehicle speed: 22 km/h
    Coolant temperature: 90 °C
    Intake air temperature: 55 °C
    Ambient air pressure: 1010 mbar
    Voltage terminal 30: 14.940 V
    Unlearning counter according OBD: 40
    Exhaust mass flow of low-pressure EGR: calculated: 3.986
    Differential pressure ratio: low-pressure EGR: 20.5 kg/h
    Exh.recircul. 2: differential pres.sensor 1 bank 1: adap. value: 19.9 hPa
    Exhaust recirculat.2: different.press.sens.1 bank 1: raw value: 16.2 hPa
    Exh.recircul.valve 1 bank 1: pos.feedback - Actual value: 83.87 %
    Exhaust recirc.valve 2 bank 1: posit.feedback - Actual value: 31.54 %
    Exh. gas recirc. 2: diff. press. sensor 1 bank 1: dyn. value: 20.5 hPa

    Measuring blocks immediately after:
    IDE00430-ENG57549 Particle filter: field regeneration request status-Bits 0-7 0
    IDE00432 Particle filter: time since last regeneration 4.287 H
    IDE00434 Particle filter: soot mass calculated 17.77 g
    IDE00435 Particle filter: soot mass measured 4.76 g
    IDE00436 Particle filter: kilometers since last regeneration 277.2 km
    ---------------------------------------------------------------------------------

    Some internet research led me to going for a drive at 2-2500RPM (basically 60mph in 4th gear) for >20 minutes to burn some build up off the DPF. That didn't work, so I followed the support on the Ross-tech website and did a regeneration at idle for UDS.

    http://wiki.ross-tech.com/wiki/index.php/Diesel_Particle_Filter_Emergency_Regeneration

    When the process had completed after about 12 minutes, I did another scan and measured the values again.

    ---------------------------------------------------------------------------------
    Monday,11,April,2022,19:56:17

    Mileage: 113808km-70717miiles

    1 Fault Found:
    19226 - Particulate Trap Bank 1
    P2002 00 [101] - Efficiency Below Threshold
    Not Confirmed - Tested Since Memory Clear
    Freeze Frame:
    Fault Status: 00000001
    Fault Priority: 2
    Fault Frequency: 1
    Mileage: 113749 km
    Date: 2022.04.11
    Time: 18:21:54


    Engine RPM: 2392.50 /min
    Normed load value: 35.3 %
    Vehicle speed: 95 km/h
    Coolant temperature: 91 °C
    Intake air temperature: 92 °C
    Ambient air pressure: 1000 mbar
    Voltage terminal 30: 14.780 V
    Unlearning counter according OBD: 40
    Exhaust mass flow of low-pressure EGR: calculated: 4.458
    Differential pressure ratio: low-pressure EGR: 41.9 kg/h
    Exh.recircul. 2: differential pres.sensor 1 bank 1: adap. value: 67.1 hPa
    Exhaust recirculat.2: different.press.sens.1 bank 1: raw value: 65.1 hPa
    Exh.recircul.valve 1 bank 1: pos.feedback - Actual value: 71.35 %
    Exhaust recirc.valve 2 bank 1: posit.feedback - Actual value: 79.32 %
    Exh. gas recirc. 2: diff. press. sensor 1 bank 1: dyn. value: 71.8 hPa


    Measuring blocks immediately after:
    IDE00430-ENG57549 Particle filter: field regeneration request status-Bits 0-7 0
    IDE00432 Particle filter: time since last regeneration 0.086 H
    IDE00434 Particle filter: soot mass calculated 5.48 g
    IDE00435 Particle filter: soot mass measured -5.90 g
    IDE00436 Particle filter: kilometers since last regeneration 0.0 km
    IDE06059 Particulate filter: oil ash mass 27.3242038 g
    IDE06060 Particulate filter ash load limit 80.000 g
    ---------------------------------------------------------------------------------

    Why does it think the soot mass measured is now negative. Is this typical following a regen?

    Also, the EGR values are a mystery to me. What do the % mean?

    I didn't log the oil ash mass initially, but it went up by ~0.005g

    I haven't driven the car yet, so I'll do this later (need to collect a heat gun from Screwfix which is about 10 minutes from my house) so I'll complete another scan out of curiosity.

    Any help/nudge in the direction to understanding the output from the regen/if something else needs investigating would be much appreciated.
    Last edited by jdragon; 28-07-2022 at 10:59 PM.
     
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  2. Re: Thread: 2.0 Diesel 190 DPF Troubleshooting 
    #2
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    Issue resolved.

    P2002 00 is a fault caused by a blocked EGR Cooler, which has since been replaced and the car no longer shows the error
    Last edited by jdragon; 29-08-2022 at 09:29 AM.
     
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