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Thread: Sharan 7N 2012 CFFB 2,0 103 kw/140 hp NOx issues

  1. #1
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    Sharan 7N 2012 CFFB 2,0 103 kw/140 hp NOx issues

    Hi to all. I am totally new at this. Had issues with my sharan because it had adblue and dpf software removed by previous owner. Check engine light came on several times during 30000 km,with message NOx sensor 2 bank 1 P229 E 00- electrical malfunction,and this was a reason to change it. The story short, I did a SW update at the dealer and everything was active again. Adblue heater,was permanent fault that was not possible to erase and I have changed it and it is gone now. On the other hand the NOx sensor message is back and I have no solution. It is possible to delete it but it keeps coming back. The sensor is new so I doubt that it is also faulty. Any ideas ?


    Scan:
    Code:
    Friday,14,February,2020,17:41:36:18722
    VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
    VCDS Version: 19.6.2.0 (x64)  HEX-V2 CB: 0.4508.4
    Data version: 20190930 DS308.0
    www.Ross-Tech.com
    
    
    VIN: WVWZZZ7NZCV037472   License Plate: 
    
    
    Chassis Type: 7N-VW36 (7N0)
    Scan: 01 03 08 09 15 16 17 18 19 25 42 44 46 4C 52 53 56 61 62 72
             
    
    VIN: WVWZZZ7NZCV037472   Mileage: 183520km-114034miles
    
    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
    16-Steering wheel -- Status: OK 0000
    17-Instruments -- Status: OK 0000
    18-Aux. Heat -- Status: OK 0000
    19-CAN Gateway -- Status: OK 0000
    25-Immobilizer -- Status: OK 0000
    42-Door Elect, Driver -- Status: OK 0000
    44-Steering Assist -- Status: OK 0000
    46-Central Conv. -- Status: OK 0000
    4C-Tire Pressure II -- Status: OK 0000
    52-Door Elect, Pass. -- Status: OK 0000
    53-Parking Brake -- Status: OK 0000
    56-Radio -- Status: OK 0000
    61-Battery Regul. -- Status: OK 0000
    62-Door, Rear Left -- Status: OK 0000
    72-Door, Rear Right -- Status: OK 0000
    -------------------------------------------------------------------------------
    Address 01: Engine (J623-CFFB)       Labels:. 03L-906-018-CFF.clb
       Part No SW: 03L 906 018 HH    HW: 03L 907 309 Q
       Component: R4 2.0l TDI   H27 9982  
       Revision: 44H27---    Serial number:               
       Coding: 0019001A042401080000
       Shop #: WSC 03020 425 00000
       ASAM Dataset: EV_ECM20TDI01103L906018HH 003017
       ROD: EV_ECM20TDI01103L906018F_VW36.rod
       VCID: 77ABEC7BDF49D69FF8D-8022
    
    1 Fault Found:
    9570 - NOx Sensor 2 Bank 1 
              P229E 00 [039] - Electrical Malfunction
              Not Confirmed - Tested Since Memory Clear
                 Freeze Frame:
                        Fault Status: 00000001
                        Fault Priority: 2
                        Fault Frequency: 1
                        Mileage: 183529 km
                        Date: 2020.02.14
                        Time: 17:36:34
    
                        Engine speed: 781.00 /min
                        Normed load value: 14.9 %
                        Vehicle speed: 0 km/h
                        Coolant temperature: 89 C
                        Intake air temperature: 17 C
                        Ambient air pressure: 1000 mbar
                        Voltage terminal 30: 14.320 V
                        Unlearning counter according OBD: 40
                        Air mass: actual value (mg/stroke): 305.1 mg/stroke
                        Mean injection quantity: 4.49 mg/stroke
                        EGR Vacuum Regulator Solen.val.: activation: 72.01 %
                        NOx Emission NOx-Sensor: 0 ppm
                        NOx emission NOx sensor 2: 0 ppm
                        Air mass for release of NOx sensor 2 offset test: 0.0 g
                        Calculated efficiency of NOx conversion: 0.660
    
    Readiness: 0 0 0 0 0
    Last edited by Uwe; 02-16-2020 at 01:00 PM. Reason: CODE tags

  2. #2
    Benevolent Dictator Uwe's Avatar
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    Got you Verified. You weren't verified previously because you used a different e-mail address for the forum than the one you used when you registered your HEX-V2, and you didn't provide a serial number when you joined the forum either. Now moving to Car Repair Support.

    The fault codes tells you which sensor it is and states "Electrical Malfunction". What have you done to trouble-shoot this so far? The sensor could be bad, or there could be a problem with the wiring to it.

    -Uwe-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

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    The wiring is OK. Voltage feed is fine. Tried SCR efficiency test. Aborted - safety reasons after some 10 mins. Like I wrote, the sensor is new, just replaced, but the fault is the same like it was on the old one. I am gonna mount back the original sensor, and see what happens

  4. #4
    Verified VCDS User Spacewalker's Avatar
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    do you know the reason why they cutt off DPF ? maybe ECU faulty ?or maybe they damage ecu while open to read SW ??
    you restore SW , but maybe is HW issue ?
    HOT HOT HOT VW Touran 2005 with ACC HOT HOT HOT

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    Quote Originally Posted by Spacewalker View Post
    do you know the reason why they cutt off DPF ? maybe ECU faulty ?or maybe they damage ecu while open to read SW ??
    you restore SW , but maybe is HW issue ?
    As much as I know it was a faulty adblue heater,and due to previous owner was a cheap bastard he decided to kill the adblue and(probably) dpf with software solution. When doing autos can before software was updated it always showed the same values for soot, oil ash.... The only parameter that was changing was the distance and time since last regen. This number was about 30000km . After software update start stop was functional, vcds was registering dpf regen cycles... Warning light was activated for adblue heater. After changing the part this fault was gone. The problem with NOx2 from the first thread is still actual. Interesting thing is that it shows after random scans, and check engine light comes afterwards(cca 200 km after registered fault)

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    If the ecu is faulty, shouldn't it be obvious and readable by vcds?

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    Quote Originally Posted by Slijo View Post
    If the ecu is faulty, shouldn't it be obvious and readable by vcds?
    The system under test (the ECU) is the system that does the test and reports its condition. VCDS just reads the conditions reported.

    So the answer to your question is: Maybe... but not necessarily obvious.

    That is if the ECU is functional enough to run its internal tests and report the results, then we can know what is malfunctioning.

    If the ECU is not functional, then it may not give details.

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  10. #8
    Verified VCDS User Spacewalker's Avatar
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    If SW update not fix a problem, and wires / sensors is 100% good - swap ECU even with IMMo OFF to test
    HOT HOT HOT VW Touran 2005 with ACC HOT HOT HOT

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