Fourtitude.com - 04 Audi A4 3.0 V6 Random Misfire
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    1. 10-11-2017 08:11 AM #1
      Hey guys,
      a few days ago received my Ross Tech cable, and did a Auto scan under engine. I am getting random misfire codes, see code, also getting a O2 sensor code. I just replaced the O2 sensor the right side Upstream. however I was told that that code means I need a new catalytic converter?
      secondly what could be causing the random misfire? I drive car daily and the car runs very smooth,and has plenty of power, it does not feel like a random misfire on all 6 cylinders. I have had a misfire on my other car on just 1 cylinder and i felt the engine shake, and lost of power. This is not the case with my Audi. the engine does not shake, idle very smooth, and accelerates as it should .
      Address 01: Engine Labels: 06C-909-559-ASN.lbl
      Part No SW: 8E0 909 559 L HW: 8E0 909 059
      Component: 3.0L V6/5V G 0010
      Coding: 0016711
      Shop #: WSC 63351 000 00000
      VCID: 3E25C0691C6D2407696-5160

      8 Faults Found:
      17524 - Oxygen (Lambda) Sensor Heating; B1 S1
      P1116 - 004 - Open Circuit - MIL ON
      16684 - Random/Multiple Cylinder Misfire Detected
      P0300 - 002 - - Intermittent
      16687 - Cylinder 3
      P0303 - 002 - Misfire Detected - Intermittent
      16690 - Cylinder 6
      P0306 - 008 - Misfire Detected - Intermittent
      16686 - Cylinder 2
      P0302 - 002 - Misfire Detected - Intermittent
      16688 - Cylinder 4
      P0304 - 008 - Misfire Detected - Intermittent
      16689 - Cylinder 5
      P0305 - 008 - Misfire Detected - Intermittent
      16685 - Cylinder 1
      P0301 - 002 - Misfire Detected - Intermittent
      Readiness: 0110 1001

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    3. 03-14-2018 04:44 PM #2
      Check your coil pack wiring harness, mine had many wires where the protective sheathing was gone and the wiring was corroded, car still ran great though

      If you plan to keep the car, I would plan to replace the coil pack harness or repair it

    4. Member
      Join Date
      Jul 12th, 2017
      Location
      Nashville, TN
      Posts
      117
      03-19-2018 06:36 PM #3
      The oxygen sensor code has to do with the heater circuit for the oxygen sensor, it has nothing to do with the cat. It is the upstream sensor on the right hand side of the engine, passenger side of the vehicle (assuming that it is LHD)

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