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Dan
Dan, ASE Certified Technician
Category: Audi
Satisfied Customers: 1568
Experience:  Auto Technician
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I have a 2005 a6 q, 3.2, Address 01: Engine (AUK) Labels:

Customer Question

Hi, i have a 2005 a6 q, 3.2,
JA: Are you fixing your A6 yourself? What have you tried so far?
Customer: Address 01: Engine (AUK) Labels: 06E-910-559-BKH.lbl
Part No SW: 4F1 910 559 B HW: 4F1 907 559 A
Component: 3.2l V6 FSI 0050
Revision: --H15--- Serial number:
Coding: 01050106190F0120
Shop #: WSC 02335 785 00200
VCID: 2A50B4B48518FD6E00-807E5 Faults Found:
17547 - Fuel Trim: Bank 2 (Add)
P1139 - 007 - System too Rich - MIL ON
Freeze Frame:
Fault Status: 10100010
Fault Priority: 6
Fault Frequency: 2
Reset counter: 40
Mileage: 206596 km
Time Indication: 0
Date: 2016.07.11
Time: 19:34:57Freeze Frame:
RPM: 672 /min
Mass Air / Rev.: 185.3 mg/str
Temperature: 90.0°C
Idle
Time: 307.2 s
Bin. Bits: 0000001018010 - Power Supply Terminal 30
P1602 - 008 - Voltage too Low - Intermittent
Freeze Frame:
Fault Status: 00101000
Fault Priority: 2
Fault Frequency: 1
Reset counter: 40
Mileage: 0 km
Time Indication: 0Freeze Frame:
RPM: 0 /min
Mass Air / Rev.: 0.0 mg/str
Temperature: 84.0°C
Engine Off
Load: 0.0 %
Speed: 0.0 km/h16687 - Cylinder 3
P0303 - 006 - Misfire Detected
Freeze Frame:
Fault Status: 00000001
Fault Priority: 6
Fault Frequency: 1
Reset counter: 40
Mileage: 206644 km
Time Indication: 0
Date: 2016.07.12
Time: 04:42:42Freeze Frame:
RPM: 1888 /min
Mass Air / Rev.: 566.8 mg/str
Temperature: 85.5°C
Part Throttle
Time: 0.0 s
Speed: 91.0 km/h16690 - Cylinder 6
P0306 - 007 - Misfire Detected
Freeze Frame:
Fault Status: 00000010
Fault Priority: 6
Fault Frequency: 1
Reset counter: 40
Mileage: 206645 km
Time Indication: 0
Date: 2016.07.12
Time: 04:43:14Freeze Frame:
RPM: 1920 /min
Mass Air / Rev.: 359.7 mg/str
Temperature: 84.0°C
Part Throttle
Time: 25.6 s
Speed: 95.0 km/h16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 006 -
Freeze Frame:
Fault Status: 00000001
Fault Priority: 6
Fault Frequency: 1
Reset counter: 40
Mileage: 206645 km
Time Indication: 0
Date: 2016.07.12
Time: 04:43:14Freeze Frame:
RPM: 1920 /min
Mass Air / Rev.: 359.7 mg/str
Temperature: 84.0°C
Part Throttle
Time: 25.6 s
Speed: 95.0 km/h
JA: Do you have the trouble code? Do you have a code reader or scan tool?
Customer: have check cts, coil packs, plugs,vacuum leaks,air filter is new,evap purge valve solenoid appears to be working,, i was thinking maybe a lazy o2 sensor. i have a vag com
JA: I'll pass this info along to the Audi Mechanic so that he can get you a quick fix. Anything else you want the mechanic to know before I connect you?
Customer: trying to think what else i have checked
Submitted: 4 months ago.
Category: Audi
Expert:  peterpete190 replied 4 months ago.

Hi my name is ***** ***** I will be happy to assist with this today.In some cases I may need more info to assist better.I apologize for any delay.

Were fuel injectors ever tested?

Did all of these codes set at the same time?

Let me know so we can continue,thanks Pete.

Customer: replied 4 months ago.
Hello Pete, my name is***** have not tested the injectors , yes all codes except the 18010 power supply code , that one has been coming and going for years
Expert:  peterpete190 replied 4 months ago.

Hi Wayne.

The power supply code can be due to a loose power or ground connection at the battery or leading from the battery or a weak battery or alternator but most of the time it can be loose or corroded cables intermittently causing this here.

I would have the fuel injectors tested to see if one or more are atomizing incorrectly causing this fault.I have seen injectors act up and allow to much fuel into the engine causing a rich condition and misfire.

But if all of these issues occurred at the same time with the misfires and rich issue I do not suspect injectors but would not rule them out.I have seen issues with the oxygen sensors cause this needing replaced so it is very possible the pre catalytic converter sensors are sending incorrect signals causing this fault here.

The other more common fault is the mass air flow sensor.If you have not cleaned this you can purchase mass air flow sensor spray cleaner from a local parts store and remove this sensor and clean it.This sometimes corrects the issue and in some cases it needs replaced.Incorrect air flow readings into the engine cause a fault with rich running and misfires.

If more help is needed, use the reply tab to continue our conversation. If no further assistance is needed, kindly rate my service,your 5 star rating is appreciated.You can rate at any time and we can continue to work on your question as this will not close out your question.Keep in mind in some cases it can be difficult to fully diagnose or help repair your vehicle without seeing it and I work on delivering the best possible answer from what I see to work with.

Thanks Pete

Customer: replied 4 months ago.
are you sure this engine has a MAF ? I only see a MAP next to the throttle body.there is nothing between the air filter and the throttle body
Expert:  peterpete190 replied 4 months ago.

I apologize as I had the wrong engine pulled up when looking at the mass air flow sensor.You are correct there is no mass air flow sensor on this model here.This model uses the MAP sensor signal as well as oxygen sensor signals for mass air input.

The fault still remains the same with the oxygen sensors before the catalytic converter or injectors at fault.Usually if the MAP sensor is an issue a code sets for it at fault.

Let me know if you need anything else and feel free to rate my help here as this is how I receive credit for my time.Your 5 star rating is appreciated

Thanks Pete

Customer: replied 4 months ago.
the map sensor check ok. are you working on these cars everyday? or just getting some info from a manuel ?
Expert:  peterpete190 replied 4 months ago.

I have worked on some of these but do use info to help gather more info.Would you like me to open your question for someone else to help here?

Customer: replied 4 months ago.
ok, that would be nice, because unfortunately i haven't found out anymore new information or a direction to go in. if you need some extra time i am ok with that or if you want to pass on it i am ok with that also. although either way i would like to thank you for your effort and appreciate your input.
Expert:  peterpete190 replied 4 months ago.

I will open your question up for others here to see if someone else can assist further on this as there may be others here that may have more info on what to check or do with this issue.I hope you can get this resolved with ease.No need to reply to my last post here unless it is a last resort as it will keep your question locked to me and others will not be able to view it.If you feel you want to continue to work with me on this feel free to reply at any time but keep in mind in some cases it can be difficult to fully diagnose or help repair this without seeing your vehicle.

Thanks Pete

Expert:  Dan replied 4 months ago.

Different expert here, You need to start with the misfire codes. Misfires could set a rich code because of unburned fuel reaching the front o2 sensor. You also need to look at fuel trims on the scan tool while the engine is at idle.

Expert:  Dan replied 4 months ago.

Focus on cylinders 3 and 6, try swapping coil packs and injectors to see if the misfire follows, also check compression of these cylinders.

Customer: replied 4 months ago.
i have move both of these around from cylinder to cylinder, the misfires are always random, not the same cylinders.
Expert:  Dan replied 4 months ago.

What does the fuel trims do at idle on the scan tool?

Customer: replied 4 months ago.
i do not have the read out now, i checked it several weeks ago and they were showing in spec. i also have checked the CTS, MAP, air filter, vacuum leaks, evap, purge solenoid, everything came within spec. that is all i can think of right now. there are no codes showing for the o2 sensor so i was thinking maybe a lazy o2 sensor.
Expert:  Dan replied 4 months ago.

Clear all codes, test drive it until the light comes on and rescan.

Customer: replied 4 months ago.
same codes will come back, i have been playing with this problem off and on for approx. 2 months, clear codes some times will reappear in approx 7 min. of driving and i have when as far as 140 km before reappearing then same running rich code but maybe different cyl. misfires
Expert:  Dan replied 4 months ago.

Low Fuel Pressure Sensor, Checking

Special tools, testers and auxiliary items required

  • Multimeter.
  • Wiring diagram.

Test requirements

  • Fuel Pump (FP) Control Module J538 OK
  • Fuses for engine electronics OK.
  • Fuel filter OK.
  • Parking brake engaged.
  • Battery voltage at least 12.5 V.
  • Vehicles with automatic transmission, shift selector lever into position "P" or "N".
  • All electrical consumers such as, lights and rear window defroster, switched off (radiator fan must not run during test).
  • A/C switched off.
  • The fuel tank at least 1/4 full.
  • Ignition switched off.

Test procedure

  • Perform a preliminary check to verify the customers complaint. Refer to → Preliminary Check .

Fig 1: Disconnecting Electrical Harness Connector From Low Fuel Pressure Sensor G410

Courtesy of VOLKSWAGEN UNITED STATES, INC.View Full-Screen

Checking voltage

  • Disconnect the electrical harness connector - 1 - from the Low Fuel Pressure Sensor G410.

Fig 2: Identifying 3-Pin Harness Connector Terminals

Courtesy of VOLKSWAGEN UNITED STATES, INC.View Full-Screen

  • Using a Multimeter , check the electrical harness connector terminals for voltage.

Low Fuel Pressure Sensor G410 Harness Connector TerminalSpecified Value

1 to Battery positive (+)Battery positive (+)

2 to Ground (GND)5 V or less

3 to Ground (GND)about 5 V

If specified value is obtained:

  • Replace the Low Fuel Pressure Sensor G410.

Refer to 24 - FUEL INJECTION SYSTEM .

NOTE:

  • The 3.2L 6-Cyl. 4V (BKH) engine is equipped with two different Low Fuel Pressure Sensors G410 designs. One design is integrated into the high pressure fuel pump and must be replaced as a complete assembly. The second design is not integrated into the high pressure fuel pump and may be replaced separately.

If the specified value was not obtained:

Checking wiring connections

If the manufacturers test box is being used, perform the following step.

  • Connect the Test Box 105 Pin VAG1598/42 with Adapter Cable 1598/39-1. Refer to 24 - FUEL INJECTION SYSTEM .

If the manufacturers test box is not being used, perform the following step.

  • Remove the Engine Control Module (ECM) J623 → Engine Control Module, Replacing .
  • Using a Multimeter , check the following wire connections for an open circuit.

Low Fuel Pressure Sensor G410 Harness Connector TerminalEngine Control Module (ECM) J623 Electrical Harness Connector Terminal

140

249

329

Specified value: 1.5 Ω max.

If the specification is not obtained:

  • Check the wiring for a short circuit to Battery positive (+) or an open circuit.
  • If necessary, repair the wiring connection.

If no malfunctions are found in wiring:

  • Replace the Engine Control Module (ECM) J623. Refer to → Engine Control Module, Replacing
  • Assembly is performed in the reverse of the removal.

After repair work, the following work steps must be performed in the following sequence:

Customer: replied 4 months ago.
i will go through this next week and give you an update after
Expert:  Dan replied 4 months ago.

Ok, also check the high pressure fuel pump. Check the cam follower that the pump rides on.

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