Only a real Lexia sadly Richard. Although the PC-based Chixias have the option I believe you need another interface to make the oscilloscope work.DickieG wrote:Lexia has an oscilloscope built in which you can access via the diagnostics menu.lancia58 wrote:I found this link it sais the frequency is 1 Hz, the Lexia sample rate is too low to see if it changes at a rate if 1Hz, the only possibility is sign an oscilloscope
Generally the response of the O2 sensor can be interpreted on a Lexia by watching how the value changes. It should be constantly changing and cycling between 200 and 800 mV roughly over the course of a second or so. If it's static or doesn't reach the highs and lows then it's not a happy bunny.
A good digital multimeter can read the O2 sensor output directly and if you can get one with a quasi-analog bargraph display then even better as you can reallay watch it swinging nicely then. Never use an old-fashioned analogue voltmeter as there internal resistance is too low and it will excessively load the O2 sensor and give erroneous readings. Likewise never try to test an O2 sensor with an ohmmeter of any sort. It will damage the O2 sensor.
Zohar, Lambda of 1.01 is in limits (UK MOT between 0.970 and 1.030) CO at 0.09 is fine and a pass. I'd say all was working well. Do you have the HC (unburned hydrocarbons) reading too?