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Thread: 2012 Polo 1.2TDI EGR Sensor (or EGR valve?)

  1. #1
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    2012 Polo 1.2TDI EGR Sensor (or EGR valve?)

    Hi! I am a newbie - bear with me - I tried to search the forum for guidence on how to trouble shoot further.
    I am wondering if the fault code is another sensor related problem, or symptoms of an EGR valve problem.

    Previously I got the error code: 15984 - Manifold Pressure / Boost Sensor (G31)
    I replaced the boost sensor and the car was fine for a couple of weeks. Now I have a new error code on the EGR Sensor.
    What do you think? The car has had the EA189 update but that is a couple of years now and should probably not be connected.

    Can I ask your advice? Is there a way to further check the sensor or the EGR valve?

    Thank you


    Code:
     Sunday,01,September,2019,14:38:41:48545
    VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x64
    VCDS Version: 19.6.1.0 (x64)  HEX-V2 CB: 0.4508.4
    Data version: 20190529 DS308.0
    www.Ross-Tech.com
    
    
    VIN: WVWZZZ6RZCY247100   License Plate: AS33140
    Mileage: 75310km-46795mi   Repair Order: 20190901
    
    
    
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    
    
    Chassis Type: 6R-VW25 (6R0)
    Scan: 01 03 08 09 15 17 19 25 44 56 61
    
    VIN: WVWZZZ6RZCY247100   Mileage: 75310km-46795miles
    
    01-Engine -- Status: Malfunction 0010
    03-ABS Brakes -- Status: OK 0000
    04-Steering Angle -- 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
    44-Steering Assist -- Status: OK 0000
    56-Radio -- Status: Malfunction 0010
    61-Battery Regul. -- Status: OK 0000
    -------------------------------------------------------------------------------
    Address 01: Engine (J000-CFWA)       Labels:. 03P-906-021-CFW.clb
       Part No SW: 03P 906 021 B    HW: 03P 907 425 
       Component: R3 1.2l TDI   H07 9979  
       Revision: 12005001    Serial number:               
       Coding: 00114014032401080000
       Shop #: WSC 22528 002 1048576
       ASAM Dataset: EV_ECM12TDI03103P906021B 001042
       ROD: EV_ECM12TDI03103P906021AA.rod
       VCID: 270A0F54CF66CE2FAB3-8072
    
    1 Fault Found:
    15536 - EGR Sensor 1 
              P0405 00 [008] - Signal too Low
              Intermittent - Confirmed - Tested Since Memory Clear
                 Freeze Frame:
                        Fault Status: 00000001
                        Fault Priority: 2
                        Fault Frequency: 17
                        Mileage: 75025 km
                        Date: 2019.08.14
                        Time: 17:56:22
    
                        Engine speed: 1120.00 /min
                        Normed load value: 99.2 %
                        Vehicle speed: 16 km/h
                        Coolant temperature: 62 C
                        Intake air temperature: 25 C
                        Ambient air pressure: 1000 mbar
                        Voltage terminal 30: 14.210 V
                        Unlearning counter according OBD: 33
                        Sensor for engine block temperature: raw value: 62 C
                        EGR Vacuum Regulator Solen.val.: activation-PWM rate: 0.0 %
                        EGR Solen.val.: actual value-PWM rate: 50.2 %
                        EGR valve: offset closed: 10 %
                        Sensor for engine block temperature: raw value: 62 C
                        High press EGR actuator: actual unconditioned volt val: 0.687 V
    
    Readiness: 0 1 0 0 0 
    
    -------------------------------------------------------------------------------
    Address 03: ABS Brakes (J104)       Labels:. 6R0-907-37x-ESP82.clb
       Part No SW: 6R0 907 379 BC    HW: 6R0 907 379 AF
       Component: ESP8.2i front H05 0002  
       Revision: --------    
       Coding: 210224E3417100B9842624E282D100521300
       Shop #: WSC 00788 648 00255
       VCID: 005874C80A48D917CA9-8054
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 08: Auto HVAC (J301)       Labels: 6R0-820-045-9AB.clb
       Part No SW: 6R0 820 045 N    HW: 6R0 820 045 N
       Component: Man AC        H02 0202  
       Revision: 0003SH02    
       VCID: 392ED92C295248DFCD7-806C
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 09: Cent. Elect. (J519)       Labels:. 6R0-937-08x-09.clb
       Part No SW: 6R0 937 088 F    HW: 6R0 937 088 
       Component: BCM PQ25 Re4  H50 0353  
       Revision: BU050001    Serial number: 0456 073120191
       Coding: 24B02BBF08A10000003009B02E2B0DD05F80612F7E860441A00000000000
       Shop #: WSC 124697 483 00190
       VCID: 41DEB1CC4182101F857-8014
    
       Subsystem 1 - Part No SW: 6R0 959 801 AB    HW: 6R0 959 801 AB  Labels: 6R0-959-801.CLB
       Component: J386__TSG_FT  008 1611 
       Serial number: KU0KU014031200014647
       Coding: 58BC30
    
       Subsystem 2 - Part No SW: 6R0 959 802 AD    HW: 6R0 959 802 AD  Labels: 6R0-959-802.CLB
       Component: J387__TSG_BT  008 1611 
       Serial number: KU0KU012031200012640
       Coding: 58BC30
    
       Subsystem 3 - Part No SW: 6R0 959 811 G    HW: 6R0 959 811 G
       Component: J388__TSG_HL  008 1611 
       Serial number: KU0KU006031200013983
       Coding: 58BC32
    
       Subsystem 4 - Part No SW: 6R0 959 812 G    HW: 6R0 959 812 G
       Component: J389__TSG_HR  008 1611 
       Serial number: KU0KU005031200017796
       Coding: 58BC32
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 15: Airbags (J234)       Labels:| 5K0-959-655.clb
       Part No SW: 6R0 959 655 L    HW: 6R0 959 655 L
       Component: VW10Airbag01J H09 0020  
       Revision: --------    Serial number: 003GY005MHNY
       Coding: 00314A
       Shop #: WSC 01383 785 00200
       ASAM Dataset: EV_AirbaVW10BPAVW250 A01001
       ROD: EV_AirbaVW10BPAVW250.rod
       VCID: 4BC293E4734ECA4F6FB-801E
    
       Crash sensor for side airbag: driver side: 
       Serial number: 3575HRB4065173JOA88+
    
       Crash sensor for side airbag: front passenger side: 
       Serial number: 3585HRB4055173JO90K1
    
       Crash sensor for side airbag: rear: driver side: 
       Serial number: 3515RRB406915N3UE0GI
    
       Crash sensor for side airbag: rear: passenger side: 
       Serial number: 3525RRB406315N3U98EE
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 17: Instruments (J285)       Labels:| 5K0-920-xxx-17.clb-SRI1
       Part No SW: 6R0 920 861 H    HW: 6R0 920 861 H
       Component: KOMBI         H04 0206  
       Serial number: 00000010730090
       Coding: 140E01
       Shop #: WSC 00788 648 00255
       ASAM Dataset: EV_DashBoardUDSJCIPQ25 A01015
       ROD: EV_DashBoardUDSJCIPQ25_A01.rod
       VCID: 3A2CC6202CD443C7C4D-806E
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 19: CAN Gateway (J533)       Labels:. 6R0-907-530-V2.clb
       Part No SW: 6R0 907 530 D    HW: 1K0 907 951 
       Component: J533  Gateway H38 0035  
       Revision:   H38       Serial number: 150312F2001281
       Coding: 2500C2
       Shop #: WSC 00788 648 00255
       VCID: 3430E8180E30B5B71E1-8060
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 25: Immobilizer (J285)       Labels:. 5K0-920-xxx-25.clb
       Part No SW: 6R0 920 861 H    HW: 6R0 920 861 H
       Component: IMMO          H04 0014  
       Serial number:               
       ASAM Dataset: EV_ImmobUDSJCIPQ25 A01001
       ROD: EV_ImmobUDSJCIPQ25.rod
       VCID: 3A2CC6202CD443C7C4D-806E
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 44: Steering Assist        Labels: 6Q0-423-156.clb
       Part No: 6R0 423 156 B
       Component: LenkhilfeTRW        V277  
       Coding: 11230
       Shop #: WSC 00788  
       VCID: 2F3AE774EE56966F633-807A
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 56: Radio
    Cannot be reached
    
    -------------------------------------------------------------------------------
    Address 61: Battery Regul. (J840)       Labels:. 1K0-907-534.clb
       Part No SW: 6R0 907 534     HW: 1K0 907 951 
       Component: Batt.regelung H38 0035  
       Serial number: 150312F2001281
       Coding: 030B1A59
       Shop #: WSC 00788 648 00255
       VCID: 74B028184EB0F5B7DE1-8020
    
       Subsystem 1 - Part No SW: 6R0 915 181 E    HW: 6R0 915 181 E
       Component: J367-BDM  H08 0181 
       Serial number: 00000000004970834439
    
    No fault code found.
    
    End----------(Elapsed Time: 01:00, VBatt start/end: 14.6V/14.5V)-----------

  2. #2
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    Hello, you have to replace the egr valve.

  3. #3
    Ross-Tech Employee Jef's Avatar
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    15536 - EGR Sensor 1
    P0405 00 [008] - Signal too Low
    Intermittent - Confirmed - Tested Since Memory Clear

    Since it is intermittent, does it come back if you clear the code?

    Have you verified the electrical paths for the G212 EGR sensor are to factory design? I'm not 100% sure, but it looks like /1 and /3 will be a 5V reference signal. And generally /2 is the data back to the ECM T60/4.
    Jef
    Ross Tech Support Team, Alpha Squad
    Auto-Scan, learn it, love it, live it... then check the fuses.

  4. #4
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    Quote Originally Posted by Jef View Post
    15536 - EGR Sensor 1
    P0405 00 [008] - Signal too Low
    Intermittent - Confirmed - Tested Since Memory Clear

    Since it is intermittent, does it come back if you clear the code?

    Have you verified the electrical paths for the G212 EGR sensor are to factory design? I'm not 100% sure, but it looks like /1 and /3 will be a 5V reference signal. And generally /2 is the data back to the ECM T60/4.
    Thank you for your reply. I can delete the code and it comes back after a couple of days.

  5. #5
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    in my experience and -ive done a lot of these but not on a 1.2....yet- the mechanical part sticks most of the time giving a low signal.

    with the time you have to spend to remove them it normally just makes more sense to replace the part. dont buy aftermarket ones as they tend to be junk and are not that much cheaper than oe parts. or just blank it and map it out get a little power boost and no more light for less money.

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