02 sensor volts?

richard

does anybody know what the volts should be from the 02 sensor when car is at cruiseing speed 70-80mph should it go from rich to lean?or should it be say 0.45v average reading? reason i ask is still haveing probs with car being really sluggish did change map sensor as that was reading incorrect voltage and now thats ok 🙂 when i was out testing car the o2 sensor was reading a constant 0.90volts at 70-80mph it was also reading a constant rich at idle for a fair while before switching does this sound like a duff 02 sensor?

vocky

luna_s or markv are the guys to speak to about sensor voltages

I notice with my air/fuel gauge that the mixture leans off massively when the throttle pedal is lifted, so you need to know what % throttle you are using at cruise conditions to judge what voltage the lambda should be giving.

from what I have read as long as the lambda reads across the voltage range then it's working ok, if they stick at a certain voltage they are duff