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VW Polo Fault codes

Discussion in 'VCDS (formerly VAG-COM) forum' started by simfin, Feb 18, 2011.

  1. simfin
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    simfin New Member VCDS Map User

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    [Feb 18, 2011]
    Had my Sons Polo looked at by a very kind garage that used a VCDS to check the codes. Below is the result - 3 intermittants and a normal one. The codes have been cleared which has cleared the Orange engine warning light and has stayed off for 10 miles driving back.

    I know it is not an Audi, but does anyone have any clues what may have been the problem - specifically the non-intermittant code 16804. It is a 1.2 E '52 plate


    [​IMG]
    #1
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  3. bez101
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    bez101 Yorkshire & Humber Rep. Regional Rep VCDS Map User

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    [Feb 18, 2011]
    im gona go for 02 sensor or cat
    16804/P0420/001056 - Catalyst System; Bank 1: Efficiency Below Threshold

    Possible Causes

    • Leakage in Intake and/or Exhaust System
    • Catalyst faulty
    • Oxygen Sensor(s) faulty
    • Oxygen Sensor(s) Control faulty
    Possible Solutions

    • Check Intake and Exhaust System for Leaks
    • Check Catalyst
    • Check Oxygen Sensor(s)
    • Check Oxygen Sensor(s) Control
      • Perform Oxygen Sensor(s) Aging Check
    #2
  4. bez101
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    bez101 Yorkshire & Humber Rep. Regional Rep VCDS Map User

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    [Feb 18, 2011]
    your 16556 will go with the 16804 code
    #3
  5. simfin
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    simfin New Member VCDS Map User

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    [Feb 18, 2011]
    Excellent, thanks for the info - Hope it isnt the Cat :(


    Where do I find the cross referance for the fault codes? Is it freely available ?
    #4
  6. simfin
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    simfin New Member VCDS Map User

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    [Feb 18, 2011]
    Ahhh, dont worry , found it on ross tech. thanks again
    #5
  7. NHN
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    NHN Retrofitter - Audi - VW - Skoda - Seat Site Sponsor VCDS Map User

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    [Feb 24, 2011]
    Yeah I'd also go with O2 sensor 1st.
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