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A zero-to-5 V is a wide range Lambda (mixture) sensor which is still technically an oxygen sensor. It just has the ability to read lean and rich conditions which a std O2 can only read (perform a step function form near zero volt output to 1+v output at rich) so the EC unit can run at stoichiometric or "perfect mixture". The Car swith the old system are constantly varying between lean and rich to find the centre. On the 0-5V, Toyota can then run the car a bit lean at light / throttle light load. This is like what a dyno tune shop uses for a sensor. They Used to be big bucks and I though aonly used on the Prius - but the tech must have trickeled down the inexpensive Yaris. Now the mystery of the awesome gas mileage (with my dad driving at least) is solved! Yeah, dad gets 40 and sis gets 35!
sonja's bro (Our family, we got to get separate logins! but we love the Yaris World!)
Last edited by TheSilkySmooth; 11-17-2008 at 01:56 PM.
Reason: tell U who I am
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11-17-2008, 01:55 PM
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