OK, voltage from oxy. sensor is supposed to be between .7 and .3 volts.
.45volts is usually considered corresponding voltage output from a normal functioning oxygen sensor, when the mixture is exactly 14.7parts air to 1 part fuel.
I would not go below ~.35 volts on the 944 (the lower the voltage, the leaner the car's running). At full throttle, it's OK to have a reading that's overly rich, and it's also OK to have a reading that VERY lean, after backing off the throttle, while the rpm is dropping. (Both are also normal)
Hope this helps, let me know.
Ahmet
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