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Thread: 2.7t O2 and misfire DTC

  1. #1
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    2.7t O2 and misfire DTC

    hey guys,

    it's been a minute since i've been on, but i'm getting HO2 DTC's again and now accompanied by misfire DTC.
    i've replaced the upstream sensors a few times now and have also tested continuity, to the best of my knowledge, of the harness from the sensors to the ICU. all seems to be good. although, a couple years ago i had to put new wires(i believe the heating wires) between the sensor plug and the icu.

    basically, i'm just looking for a good place to start for now.

    here are the DTC's:

    Code:
    18014 - Rough Road/Engine Torque Signal from ABS 
                P1606 - 35-00 - Electrical Malfunction
    17524 - Oxygen (Lambda) Sensor Heating; B1 S1 
                P1116 - 35-00 - Open Circuit
    17528 - Oxygen (Lambda) Sensor Heating; B2 S1 
                P1120 - 35-00 - Open Circuit
    16684 - Random/Multiple Cylinder Misfire Detected 
                P0300 - 35-00 - 
    16685 - Cylinder 1 
                P0301 - 35-00 - Misfire Detected
    16686 - Cylinder 2 
                P0302 - 35-00 - Misfire Detected
    16518 - Oxygen (Lambda) Sensor B1 S1 
                P0134 - 35-00 - No Activity
    16538 - Oxygen (Lambda) Sensor B2 S1 
                P0154 - 35-00 - No Activity


    and here are the readiness results:


    Code:
    Readiness Status: 0110 0101
    Exhaust Gas Recirculation: Passed
    Oxygen Sensor Heating: Failed or Incomplete
    Oxygen Sensor(s): Failed or Incomplete
    Air Conditioning: Passed
    Secondary Air Injection: Passed
    Evaporative Emissions: Failed or Incomplete
    Catalyst Heating: Passed
    Catalytic Converter(s): Failed or Incomplete

    although, i do believe that when i ran readiness test, the egr part didn't pass. those are what i got from last time and didn't complete test past the initial ABORT in the exhaust diagnostic.

    thank you for your time.
    Last edited by topest_rex; 06-09-2018 at 11:43 PM.

  2. #2
    NostraJackAss Jack@European_Parts's Avatar
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    Please post a complete auto-scan with OBD2 and Mode 9 too.

    Thank you
    Last edited by Uwe; 06-10-2018 at 08:52 AM. Reason: Added link
    European Parts Emporium/Performance / Immobilizer Solutions EPE
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  3. #3
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    ok. i'm not sure of the completeness of the mode 9 but i'll give you what i got.


    Code:
    Sunday,10,June,2018,13:45:43:61315
    VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x64
    VCDS Version: 18.2.1.2 (x64)
    Data version: 20180518 DS287.1
    www.Ross-Tech.com
    
    
    Mileage:    Repair Order: 6-10-18-fulldtc
    
    
    
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    
    
    Chassis Type: 4B - Audi A6/S6/RS6/allroad C5 (1998 > 2005)
    Scan: 01 02 03 06 08 15 16 17 18 22 34 35 36 37 45 55 56 57 65 67
              75 76 77
     
    -------------------------------------------------------------------------------
    Address 01: Engine        Labels: 078-907-551-AZA.lbl
       Part No: 4B0 907 551 K
       Component: 2.7l V6/5VT     G   0005  
       Coding: 06612
       Shop #: WSC 02325  
       VCID: 2C577EDFDCE4B424AB-5140
    
    9 Faults Found:
    18014 - Rough Road/Engine Torque Signal from ABS 
                P1606 - 35-00 - Electrical Malfunction
    17524 - Oxygen (Lambda) Sensor Heating; B1 S1 
                P1116 - 35-10 - Open Circuit - Intermittent
    17528 - Oxygen (Lambda) Sensor Heating; B2 S1 
                P1120 - 35-10 - Open Circuit - Intermittent
    16684 - Random/Multiple Cylinder Misfire Detected 
                P0300 - 35-10 -  - Intermittent
    16685 - Cylinder 1 
                P0301 - 35-10 - Misfire Detected - Intermittent
    16686 - Cylinder 2 
                P0302 - 35-10 - Misfire Detected - Intermittent
    16518 - Oxygen (Lambda) Sensor B1 S1 
                P0134 - 35-10 - No Activity - Intermittent
    16538 - Oxygen (Lambda) Sensor B2 S1 
                P0154 - 35-10 - No Activity - Intermittent
    18010 - Power Supply Terminal 30 
                P1602 - 35-10 - Voltage too Low - Intermittent
    Readiness: 0110 0101
    
    -------------------------------------------------------------------------------
    Address 08: Auto HVAC        Labels: 4B0-820-043-MY1.lbl
       Part No: 4B0 820 043 R
       Component: A6-Klimavollautomat D63  
       Coding: 00160
       Shop #: WSC 02335  
       VCID: 295987CBD316A10C50-2580
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 15: Airbags        Labels: 4B0-959-655-AI8.lbl
       Part No: 4B0 959 655 F
       Component: Airbag Front+Kopf  0002  
       Coding: 00406
       Shop #: WSC 02335  
       VCID: 336565A301DAEBDCEA-5198
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 16: Steering wheel        Labels: 4B0-907-487.lbl
       Part No: 4B0 907 487 
       Component: E Lenkrad Elektronik D03  
       VCID: 69D9C7CB1396610C90-4BCA
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 17: Instruments        Labels: 4B0-920-xxx-17.lbl
       Part No: 4B0 920 980 MX
       Component: C5-KOMBIINSTR. VDO D11   
       Coding: 02264
       Shop #: WSC 00000  
       VCID: 071DE17325C2B77C66-515E
    
    No Faults Found
      or DTCs not supported by controller
      or a communication error occurred
    
    -------------------------------------------------------------------------------
    Address 35: Centr. Locks        Labels:. 4B0-962-258.lbl
       Part No: 4B0 962 258 J
       Component: Central Lock/Alarm  D32  
       Coding: 15885
       Shop #: WSC 02335  
       VCID: 306F6AAFF0CCD0C497-4EEA
    
    2 Faults Found:
    01560 - Passenger Door 
                59-00 - Can't Unlock
    01562 - Rear right door 
                59-00 - Can't Unlock
    
    -------------------------------------------------------------------------------
    Address 36: Seat Mem. Drvr        Labels: None
       Part No: 4B0 959 760 A
       Component: Sitzmemory          D05  
       VCID: 2B557DC3D9EAB31CA2-4B1A
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 45: Inter. Monitor        Labels: 4B0-951-178.lbl
       Part No: 4B0 951 178 A
       Component: Innenraumueberw.    D02  
       Coding: 00101
       Shop #: WSC 02335  
       VCID: 26438CF7C2088E747D-5210
    
    2 Faults Found:
    01377 - Ultra Sonic Sensor for Alarm System; Left (G170) 
                27-00 - Implausible Signal
    01462 - Anti-theft alarm ultra sonic Sensor (G209) 
                53-10 - Supply Voltage Too Low - Intermittent
    
    -------------------------------------------------------------------------------
    Address 55: Headlight Range        Labels: 4B0-907-357-AUT.lbl
       Part No: 4B0 907 357 
       Component: LEUCHTWEITEREGLER  D004  
       Coding: 00006
       Shop #: WSC 02325  
       VCID: 65C1CBFBFF8E456CB4-51B6
    
    1 Fault Found:
    00774 - Level Control System Sensor; Rear Left (G76) 
                31-00 - Open or Short to Ground
    
    -------------------------------------------------------------------------------
    Address 56: Radio        Labels: 8D0-035-1xx-56.lbl
       Part No: 4B0 035 195 A
       Component:  Radio              D00  
       Coding: 00117
       Shop #: WSC 02335  
       VCID: 1E33A4179A5856B435-4B32
    
    No fault code found.
    
    End-------------------------(Elapsed Time: 07:01)--------------------------




    Code:
    Sunday,10,June,2018,13:31:48:61315
    VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x64
    VCDS Version: 18.2.1.2 (x64)
    Data version: 20180518 DS287.1
    www.Ross-Tech.com
    
    
    Mileage:    Repair Order: 6-10-18-calID
    
    
    
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    
    
    Mode 9 : Calibration Identification
    
    Type 04 - Calibration ID : 0001 (Address 10)
    Type 06 - Calibration Verification Number : 0000002D (Address 10)


    my car is a 2000 allroad unmodified.

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  5. #4
    NostraJackAss Jack@European_Parts's Avatar
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    Change the rear OXS sensors, because the heater circuits are shared in a loop with front and rear & the ECU may be already damaged.

    Be sure that all 4 OXS sensors are genuine units and not even AFT Bosch.

    Check grounds and all lead current tracks to coils.

    Check for false air leak & that is causing the forward OXS sensors to go dead.

    Check for adequate FPR function, Fuel PSI & volume.

    Verify the MAF isn't dead or wrong part number or FOD type because I suspect it is and causing the ABS to wig out and possible cause for forward OXS inactivity too.

    I also have reason to believe your ECU is indeed inconsistent and possibly FOD modified!
    European Parts Emporium/Performance / Immobilizer Solutions EPE
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  6. #5
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    those all sound like very good tests for a baseline, hopefully. do you have any suggestions on checking for false air leaks? as in pressurize the intake and see if anything leaks??? i have also thought that the ECU might be inconsistent as you're mentioning. additionally, the reason that i had changed the leads to the upper OXS is because they were burnt and giving a bit of resistance. might i assume that there are also related traces in the ECU which are also burnt?

  7. #6
    NostraJackAss Jack@European_Parts's Avatar
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    those all sound like very good tests for a baseline, hopefully. do you have any suggestions on checking for false air leaks? as in pressurize the intake and see if anything leaks??? i have also thought that the ECU might be inconsistent as you're mentioning. additionally, the reason that i had changed the leads to the upper OXS is because they were burnt and giving a bit of resistance. might i assume that there are also related traces in the ECU which are also burnt?
    Could be .......





    No no no over here!

    http://forums.ross-tech.com/showthre...you!-Air-leaks!
    European Parts Emporium/Performance / Immobilizer Solutions EPE
    Certified Master Trained NY/BAR/BAD 7076062/ASE/SAE/NASTF Legal Factory Authorized/Licensed GeKo/FaZit # 403738
    Specializing in Custom Services IE: "welding-fabrication" / EPA-SMOG Update or Pass-Thru-Programming / Data Transfer / Immobilizers & OEM Quality Parts
    Above Magic! No Written record, AUTO-SCAN or Appointment = NO HELP!
    www.FixMyEuro.com <<<<<CLICK HERE! or vwemporium@aol.com ( JPPSG & Unverified members need not PM me & Please don't email or call facility for free tech support...use the forum )
    Getting you CONTROL again of your property - TAKE IT! In Conjunction with.........

  8. #7
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    haha. i like the pic. thank you for that link. i have to go to dinner, but i'll look through it and gather anything necessary. the only reason that i had asked about the leak test is that i build a pressure tester with a fernco et. al. for the intake, but there is obviously more. i may also have a bad cam seal.

    furthermore, while searching the DTCs online i came across one for the misfire that said that a cylinder might be leaking and to do a compression test. would that be a concern given these DTCs, or is the combination of the codes relative more so to what you are considering?? but that won't stop me from performing one anyways, because i would think that it's a good idea regardless

  9. #8
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    Be sure that all 4 OXS sensors are genuine units and not even AFT Bosch.
    do you mean the ultra-expensive, like 200 beans for one, OXS?? instead of the bosch click in or universal?

  10. #9
    NostraJackAss Jack@European_Parts's Avatar
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    do you mean the ultra-expensive, like 200 beans for one, OXS?? instead of the bosch click in or universal?
    Yup........ because it indeed can and most time does matter!
    European Parts Emporium/Performance / Immobilizer Solutions EPE
    Certified Master Trained NY/BAR/BAD 7076062/ASE/SAE/NASTF Legal Factory Authorized/Licensed GeKo/FaZit # 403738
    Specializing in Custom Services IE: "welding-fabrication" / EPA-SMOG Update or Pass-Thru-Programming / Data Transfer / Immobilizers & OEM Quality Parts
    Above Magic! No Written record, AUTO-SCAN or Appointment = NO HELP!
    www.FixMyEuro.com <<<<<CLICK HERE! or vwemporium@aol.com ( JPPSG & Unverified members need not PM me & Please don't email or call facility for free tech support...use the forum )
    Getting you CONTROL again of your property - TAKE IT! In Conjunction with.........

  11. #10
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    oh ok. i wasn't sure if that was an urban legend, but i'm definitely taking your word.

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