Oxygen O2 Lambda Sensor

Discussion in 'ELECTRICAL' started by westcoast, Oct 8, 2019.

  1. westcoast

    westcoast Fresh Recruit

    1.how to check my lambda sensor is working or not,

    2.what will cause any symptoms?

    3.4EFTE GT or Glanza and 4EFE all lambda sensors are same or?

    4. also i need to buy a good durable lambda sensor for my starlet gt 4efte from online sites,

    have you guys tried online sensors? can you recommend me a good trusted one with a link? Thanks
  2. TylerGlanza

    TylerGlanza Active Member

    4efte and 4efe lambda sensors are different.

    My oem lambda was seized in my cat so when i went decat i ran it without for a while and it ran the same. Have an aftermarket one from ebay now and its no different to be honest.
    Jay likes this.
  3. SKINY

    SKINY Registered User +

    Mine has been disconnected since I got it 2.5 years ago and I never noticed anything out off the ordinary, odd bit off overfueling but the ECU tends to run a bit rich anyway as per normal turbo Toyota rules :)
    TylerGlanza likes this.
  4. TylerGlanza

    TylerGlanza Active Member

    Mines the same, noticed it mainly since the decat was fitted where it will just randomly pop lol
    SKINY likes this.
  5. SWJ

    SWJ Member

    You can check it with a dvom. Back prob the wires, ground and a hot. If it's a narrow band it should try and stay at 1 volt DC but it can't so if working properly , it will fluctuate rapidly as the ecu tries to maintain a stoichiometric, AFR at idle and part throttle ie 14.7 which is equal to one volt dc on a narrow band. But it can't so if is working it will move rapidly between less than one volt and slight more as the ECU cuts or adds fuel.

    A narrow band only works at idle and part throttle, at full throttle the ECU (Stock) does not care. And the last bit is why you can't tune WOT, with a narrow band. You need a WB for that and those read to 5 volts DC with a DVOM, full range as it were. A faulty functioning O2 ... tends to fail "rich" hence a "popping sound" ie burnt fuel, igniting. And if the car is running rich at idle and part throttle?? You get worst fuel mileage ,more emissions and raw un-burnt igniting in the cat will destroy it!

    But if you don't care about mileage and don't have to pass smog ... then you know , whatever. :)

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