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17545 - Fuel Trim: Bank 1: System too Rich

Discussion in 'A3/S3 Forum (8L Chassis)' started by Westy, Feb 25, 2011.

  1. Westy
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    Westy Double Dark Side! Diesel & 8P

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    [Feb 25, 2011]
    The following error has come up on my mates car which is an A3 1.8T Sport (AUM). Audi have told him that the car needs a new cat but I have been doing some tests on it and I believe the fault is with something else.

    1 Fault Found:
    17545 - Fuel Trim: Bank 1 (Add): System too Rich
    P1137 - 35-00 - -

    Firstly can anyone confirm what the power output of the AUM K03s should be as the MAF is calculating around 150bhp

    Secondly has anyone had this error before, and can you shed any light on the problem?

    I've tested the lambda sensors and the fuel EVAP system and everything comes back fine. I cleared the MIL and the car seems to drive fine, very smooth and no hesitation to suggest the Cat is shagged! My mate says that the car just seems to cut its power which I think is due to the MIL putting the car into limp mode.

    Anyway this is what Ross-Tech suggest may be the problem so I will check:

    17545/P1137/004407 - Fuel Trim: Bank 1 (Add): System too Rich

    Possible Symptoms


    • Malfunction Indicator Light (MIL) active
    Possible Causes


    • Mass Air Flow (MAF) Sensor faulty
    • Fuel Pressure Regulator faulty
    • Fuel Injector(s) faulty
    • Oxygen Sensor Control faulty
      • Oxygen Sensor(s) faulty
    • Evaporative Emission (EVAP) System faulty
    Possible Solutions


    • Check Mass Air Flow (MAF) Sensor
    • Check Fuel Pressure Regulator
    • Check Fuel Injector(s)
    • Check Oxygen Sensor Control
      • Check Oxygen Sensor(s)
    • Check Evaporative Emission (EVAP) System
    Thanks for any help.

    Westy
    #1
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  3. [Dave B]
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    [Dave B] Rrrrrrrr-tech

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    [Feb 25, 2011]
    I had a very similar fault as detailed in this thread: http://www.audi-sport.net/vb/a3-s3-forum-8l-chassis/109628-mafs-boost-leaks-info-please.html

    This was eventually discovered to be a clogged FPR due to vPower dissolving the insides of the rubber fuel pipes leading to the fuel rail, as pictured in my thread about Badger5 TIP and JC Filter.

    Your code is slightly different though as it states (Add) rather than (Multi). There's a good explanation about the differences somewhere.....
    #2
  4. badger5
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    badger5 www.badger5.co.uk Site Sponsor

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    [Feb 25, 2011]
    this
    [​IMG]
    #3
  5. [Dave B]
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    [Dave B] Rrrrrrrr-tech

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    [Feb 25, 2011]
    That's the bad boy..
    #4
  6. [Dave B]
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    [Dave B] Rrrrrrrr-tech

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    [Feb 25, 2011]
    #5
  7. Westy
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    Westy Double Dark Side! Diesel & 8P

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    [Feb 25, 2011]
    #6
  8. Westy
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    Westy Double Dark Side! Diesel & 8P

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    [Feb 25, 2011]
    Right, it's definitely not the FPR as I just checked it in the work carpark. It's clean as a whistle.

    Word of warning, dont do mechanical work in a suit! The FPR still had pressure in it and I got sprayed with fuel as I popped the top off. My colleagues in the office aren't best pleased with the smell!
    #7
  9. Carl.S
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    Carl.S Member

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    [Feb 25, 2011]
    boost leak is also a possibility
    #8
  10. DenCar
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    DenCar Member

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    [Feb 25, 2011]
    I had that code along with the code for a problem with the pre-cat lambada sensor, i had a new lambada fitted and and the code has not returned. Fuel economy improved from around 26mpg to 35 mpg now. This was on my wifes car.

    DC
    #9

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