Audi A8 This full sized Audi A8 sedan offers interior luxury and spaciousness comparable to any car in the full sized luxury sedan class

A8 in trouble

  #1  
Old 12-13-2009, 05:26 PM
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Default A8 in trouble

ok guys and girls,

I ran a VAG test few days ago.
Now, for reminder, I didnt drive my car since March this year as it was unregistrared, just few short drives down the street after engine was on working temp every few days in a week.

I had to replace old batery in June after it died on me.
So, my car was under stress because he lost all electric power.
I am hoping that all those problems on VAG test are results of that.

Here is test result:

VAG-COM Version: Release 311.2-N

Control Module Part Number: 4D0 907 557 K
Component and/or Version: 4,2L V8/4V MOTR AT D02
Software Coding: 04273
Work Shop Code: WSC 00000
11 Faults Found:
18010 - Power Supply Terminal 30: Voltage too Low
P1602 - 35-10 - - - Intermittent
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-10 - - - Intermittent
16685 - Cylinder 1 Misfire Detected
P0301 - 35-10 - - - Intermittent
16687 - Cylinder 3 Misfire Detected
P0303 - 35-10 - - - Intermittent
16686 - Cylinder 2 Misfire Detected
P0302 - 35-10 - - - Intermittent
16688 - Cylinder 4 Misfire Detected
P0304 - 35-10 - - - Intermittent
17604 - Oxygen (Lambda) Sensor Heater Circuit: B1 S1: Electrical Malfunction
P1196 - 35-00 - -
17605 - Oxygen (Lambda) Sensor Heater Circuit: B2 S1: Electrical Malfunction
P1197 - 35-00 - -
16486 - Mass Air Flow Sensor (G70): Signal too Low
P0102 - 35-00 - -
16518 - Oxygen (Lambda) Sensor B1 S1: No Activity
P0134 - 35-00 - -
16538 - Oxygen (Lambda) Sensor B2 S1: No Activity
P0154 - 35-00 - -


VAG-COM Version: Release 311.2-N

Control Module Part Number: 8E0 614 111 M
Component and/or Version: ABS/EDS 5.3 QUATTRO D41
Software Coding: 0273004134
Work Shop Code: BB 24302
1 Fault Found:
00290 - ABS Wheel Speed Sensor: Rear Left (G46)
30-00 - Open or Short to B+



VAG-COM Version: Release 311.2-N

Control Module Part Number: 4D0 919 033 M
Component and/or Version: D2-KOMBIINSTRUMENT D33
Software Coding: 00083
Work Shop Code: WSC 00425
2 Faults Found:
00771 - Fuel Level Sensor (G)
30-10 - Open or Short to B+ - Intermittent
00667 - Ambient Temperature Signal
30-10 - Open or Short to B+ - Intermittent


here is next one after we made restart of the system:

================================================== ========================================

VAG-COM Version: Release 311.2-N

Control Module Part Number: 4D0 907 557 K
Component and/or Version: 4,2L V8/4V MOTR AT D02
Software Coding: 04273
Work Shop Code: WSC 00000
5 Faults Found:
16486 - Mass Air Flow Sensor (G70): Signal too Low
P0102 - 35-00 - -
16515 - Oxygen (Lambda) Sensor B1 S1: Signal too Low
P0131 - 35-00 - -
16538 - Oxygen (Lambda) Sensor B2 S1: No Activity
P0154 - 35-10 - - - Intermittent
17604 - Oxygen (Lambda) Sensor Heater Circuit: B1 S1: Electrical Malfunction
P1196 - 35-00 - -
17605 - Oxygen (Lambda) Sensor Heater Circuit: B2 S1: Electrical Malfunction
P1197 - 35-00 - -

VAG-COM Version: Release 311.2-N

Control Module Part Number: 4D0 907 557 K
Component and/or Version: 4,2L V8/4V MOTR AT D02
Software Coding: 04273
Work Shop Code: WSC 00000
8 Faults Found:
17604 - Oxygen (Lambda) Sensor Heater Circuit: B1 S1: Electrical Malfunction
P1196 - 35-00 - -
17605 - Oxygen (Lambda) Sensor Heater Circuit: B2 S1: Electrical Malfunction
P1197 - 35-00 - -
16486 - Mass Air Flow Sensor (G70): Signal too Low
P0102 - 35-00 - -
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-00 - -
16685 - Cylinder 1 Misfire Detected
P0301 - 35-00 - -
16688 - Cylinder 4 Misfire Detected
P0304 - 35-00 - -
16687 - Cylinder 3 Misfire Detected
P0303 - 35-00 - -
16686 - Cylinder 2 Misfire Detected
P0302 - 35-00 - -


I am hoping that u will give me some ashuring advice...
thx
 
  #2  
Old 12-13-2009, 09:48 PM
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Default missfire

Had similar problem as yours,misfires,replaced spark plugs,coil packs,oxygen sensor and nothing,after removing air flow sensor car running no problem .Good luck.
 
  #3  
Old 12-13-2009, 10:05 PM
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Agreed, disconnect the MAF sensor and see if it improves, if it does, you have a faulty MAF sensor.
 
  #4  
Old 12-14-2009, 11:34 AM
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thanks guys.

what about lambda sonds? can they be solved with faulty MAF?
 
  #5  
Old 12-15-2009, 12:32 AM
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Can a bad MAF cause O2 sensor codes? Yup.
 
  #6  
Old 12-15-2009, 02:53 AM
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thanks,

I am going out to dig my silver hog out of the snow..and start to remove those sensors.

btw. where can this MAF be?
 
  #7  
Old 12-15-2009, 11:05 AM
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Its the main sensor just after the airbox in the intake. It should have a large sensor connector, you can't miss it. What i would do is start the car, and while its running disconnect the sensor, if it magically starts running smoother you have a bad MAF.
 
  #8  
Old 12-15-2009, 01:08 PM
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ok, cool.
 
  #9  
Old 12-23-2009, 07:36 AM
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i tried to find MAF sensor, nothing on the tube, but found soemthing inside of filter box

[IMG][/IMG]

[IMG][/IMG]

is that it?

i left cable unhooked and start engine, but besides vibrations, no CAT light when up..
can i assume without vagcom that i found the problem?
 
  #10  
Old 12-23-2009, 10:59 AM
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Oh yeah thats the MAF, i forgot its like a 1.8T engine with it inside the air box, sorry about that. So it ran much better with it disconnected?
 

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