2.7t O2 and misfire DTC

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topest_rex

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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.
 
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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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Jack@European_Parts

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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!
 
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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?
 
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Jack@European_Parts

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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?
Click to expand...

Could be .......

hqdefault.jpg




No no no over here!

http://forums.ross-tech.com/showthr...gases-and-vacuum-amp-so-should-you!-Air-leaks!
 
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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
 
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Be sure that all 4 OXS sensors are genuine units and not even AFT Bosch.
Click to expand...

do you mean the ultra-expensive, like 200 beans for one, OXS?? instead of the bosch click in or universal?
 
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Jack@European_Parts

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do you mean the ultra-expensive, like 200 beans for one, OXS?? instead of the bosch click in or universal?
Click to expand...

Yup........ because it indeed can and most time does matter!
 
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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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Jack@European_Parts

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oh ok. i wasn't sure if that was an urban legend, but i'm definitely taking your word.
Click to expand...

If you need an ECU and OXS sensor package with OEM units please let me know....

Also open ECU to see if you get a visual on anything being burned up.

Take MAF out and apart and post pictures of internal and externals of it and ECU and post to obsevre.........
 
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Jack@European_Parts

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The deal of deals blitz.........

1 new not reman ECU Part No: 4B0 907 551 K with your core submitted for data transfer
4 x new genuine OXS sensors with crimps, Take sensors out complete harness's and send in with ECU, I will wire them up for you and verify tone out.

1 new genuine MAF OEM sensor.

Package deal for you only as a RT member. $1200 Shipped with core in advance!

Should you need a set of bolt down coils, spark plugs or fuel pump, let me know & I can make something else happen too.
 
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OK!!!!!!!! sure thing. i will get on that immediately. thank you very much for this offer. i just did a parts list last night and rounded out at about $1250 with figuring $100-$300 for an ECU from my favorite junk yard the next county over (Beaver county). this guy has audis out the wazoo, but i've gone through two ecu for testing already in the past year for failing OXS's. lol. so a genuine, new, non-reman, would be the cats meow. not to mention any verification that your testing may acquire.
 
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also, while reading through the "why i measure crankcase..." thread i noticed about oil type and quality. i use pentosin 5w-30. would you consider that an issue in general??
 
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Jack@European_Parts

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It could depending on age of wear for blowby but pentosin oil is pretty good.
I would run it with a short duration of SAE 10w30 like 1k then maybe use 10w 30 in summer pentosin and 5w 30 in winter.
Biggest issue I always see is overfilling or overfilling from sump fuel contamination from incomplete combustion hence misfires.

Let me know how I can help....
 
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i took some pics of the MAS. can i post them directly to here?

also, after examining both my primary ecu and the backup i couldn't find any discolored traces, bad solder joints, or burnt components. also, since it's dark out now, i didn't look for a shrader valve on fuel rail. is there a place to tap in for fuel pressure testing, and what value should i be looking for??

N.B.: i had replaced the fuel pump after hesitant starting a few months ago, although i got the pump from schlep-boys and not from pelicanparts or anything like that, but i've only had quick starts from there on. possible issue?

lastly, this is maybe a little daft to ask, but how would you recommend that i test the ground through the coils? or just test the ground lead within the harness itself?
 
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also also, out of curiosity, is there any way to test the injectors other than simply a leak down test?
 
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Jack@European_Parts

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Grounds can be over laid or tested with load light.
Fuel injectors can be tested by you with ohm meter DVOM and testing amperage during operation so can a FP to a degree outside of mechanical's.
You could take injector rail out lift with injectors and shoot into glass jar to observe spray patterns.
Be careful and use strict safety measures when doing this.
Swapping injectors is best way to see if DTC moves if looking for cheap result.
Fuel PSI and volume tests can be observed in RTFB and usually use a T fitting if no service port is present.
 
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