How to test Lambda sensors | NGK Spark Plugs UK

Direct-fit & Universal Oxygen Sensor Application List

A Lambda sensor measures the amount of unburned oxygen in a vehicle's fuel exhaust

Nissan Common Throttle Body Failures - ECU Testing

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  • Temat: lamna sensor | Co to jest? zapewne chodzi³o o "lamBDa sensor" - sonda lambda Fiat all models 1993 - 2004 onwards. Emission Failures - High CO & low lamna reading.

    Emission Failures -common causes of rich running faults are the O2 sensor or the ECU (engine control unit) both of these parts are relatively simple to check, to check the O2 sensor strip back the insulation on the signal wire from the O2 sensor, this wire is usually black. Then hold the bare wire between your finger and thumb then touch your other hand on to the battery positive the internal resistance of your body will give 1volt at your finger tips which is what the sensor would give out when the engine runs rich, if the emissions come down then you have a faulty lamna sensor or wiring but if the emissions remain the same then the ECU is a possible fault.

  • Gibbmodoll 17-07-2010 12:06 PM

    Alfa Romeo, all models 1993 - 2004 onwards
     
    Alfa Romeo, all models 1993 - 2004 onwards
    Emission Failures -
    High CO & low lambda reading. common causes of rich running faults are the lamna sensor or the ECU (engine control unit) both of these parts are relatively simple to check, to check the sensor strip back the insulation on the signal wire from the lamna sensor, this wire is usually black. Then hold the bare wire between your finger and thumb then touch your other hand on to the battery positive the internal resistance of your body will give 1volt at your finger tips which is what the sensor would give out when the engine runs rich, if the emissions come down then you have a faulty lambda sensor or wiring but if the emissions remain the same then the ECU is a possible fault.
    High CO with normal lambda reading. If the oxygen level is below 1% then a high CO with a normal lambda reading can only be one thing - the catalytic converter, when ever you get this reading the catalyst should be condemed. But always make sure you check the oxygen level first, if its high (over 1% at speed) then you’ve got a leaking exhaust or engine runing problems.

  • Honda, all models 1993 - 2004 onwards

    Emission Failures -

    High CO  & low lamna reading.   common causes of rich running faults are the lamna  sensor or the ECU (engine control unit) both of these parts are relatively simple to check, to check the sensor strip back the insulation on the signal wire from the lamna sensor, this wire is usually black.  Then hold the bare wire  between your finger and thumb then touch your other hand on to the battery positive the internal resistance of your body will give 1volt at your finger  tips which is what the sensor would give out when the engine runs rich, if the  emissions come down then you have a faulty lamnda sensor or wiring but if the emissions remain the same then the ECU is a possible fault. For more information  on ECU testing click on ECU

Citroen common faults - Common car faults