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Hey guys, apart from what little I've learned from google searches still don't know much about Lambda Sond. My 240 has the little SOND light on the dash, how come some have the badge on the grille? What is the significance of Lambda Sond and Volvo cars?
 

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Lambda Sonde...<p>a plumb line (probe - sonde) into the central brain activity (lambda - Greek letter resembling cranial assemblage).<p>George Dill<br>
From wiki...
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Function of a lambda probe
Lambda probes are used to reduce vehicle emissions by ensuring that engines burn their fuel efficiently and cleanly. Robert Bosch GmbH introduced the first automotive lambda probe in 1976, and it was first used by Volvo and Saab in that year. The sensors were introduced in the US from about 1979, and were required on all models of cars in many countries in Europe in 1993.
By measuring the proportion of oxygen in the remaining exhaust gas, and by knowing the volume and temperature of the air entering the cylinders amongst other things, an ECU can use look-up tables to determine the amount of fuel required to burn at the stoichiometric ratio (14.7:1 air:fuel by mass for gasoline) to ensure complete combustion.
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http://www.brickboard.com/RWD/index.htm?id=697537&show_all=1

George Dill
 
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