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fault code

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by hades-, Jan 14, 2012.

  1. hades-
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    hades- Yorkshire & Humber Rep. Regional Rep VCDS Map User

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    [Jan 14, 2012]
    17606 - Oxygen (Lambda) Sensor Heater Circuit: B1 S2
    P1198 - 35-00 - Electrical

    from vcds wiki
    17606/P1198 - Oxygen (Lambda) Sensor Heater Circuit: B1 S2: Electrical Malfunction [h=4]Possible Causes[/h]
    • Failed O2 sensor heater circuit
    • Wiring Harness issue
    • Failing ECM
    [h=4]Possible Solutions[/h]
    • Inspect and test O2 sensor heater circuit as per repair manual
    • Inspect and test wiring harness as per wiring diagram
    • Replace ECM if O2 sensor and wiring harness are to factory design
    whats the ECM ?
    #1
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  3. murran
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    murran Active Member

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    [Jan 14, 2012]
    engine control modual. ecu basically.

    you need a new lambda sensor most likely. check the resistance thru the heater circuit on the sensor itself.
    #2
  4. hades-
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    hades- Yorkshire & Humber Rep. Regional Rep VCDS Map User

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    [Jan 15, 2012]
    cheers murran
    would that be the pre cat lambe or the 1 after the cat ?
    #3
  5. murran
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    murran Active Member

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    [Jan 15, 2012]
    b1 s2 it says.... s2 = sensor 2 = post cat sensor.

    s1 being the pre cat sensor.
    #4

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