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what should 02 voltage #'s be at idle? should they sway or stay put?TIA

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Old 01-10-2004, 06:38 AM
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what should 02 voltage #'s be at idle? should they sway or stay put?TIA
Old 01-10-2004, 08:10 AM
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Default When the car is first warming up, they'll probably stay put, but once warm....

they should sway.

Once you go WOT, they should stay put, but otherwise, they will sway.
Old 01-10-2004, 08:51 AM
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Default thanks john, just trying to find out if mine is on it's way out or what...

it seems as if it's trying to get going than comes back down in idle.
what values should i be seeing in idle, after it's warm.
thanks,

Ray
90 G60 Tornado Red
00 S4 Silver/Onyx
Old 01-10-2004, 08:44 PM
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Default It's hard to say...

Usually between 0.2 and 0.7 Volts, constantly cycling.

I've got a WB O2 hooked up, and it shows the A/F ratio bouncing between 13.9:1 and 15.5:1, so for the most part, it's always adjusting, and going up and down. There really isn't anyway to tell if it's bad or not.
Old 01-11-2004, 03:02 PM
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well , i've got a DTC saying front pass. side is down...but i see it active on the vag.
Old 01-11-2004, 05:45 PM
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Default Does it say the sensor or the heating element?

some times the heating element goes out, the O2 will still work, it just takes longer to warm up.
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