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Wide Band AF Sensor from Mitchell1 accurate?

  • timothy.spencer
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1 year 2 months ago #86725 by timothy.spencer
Wide Band AF Sensor from Mitchell1 accurate? was created by timothy.spencer
Take a look at this service data I saw in Mitchell 1 for a 2005 Pontiac Vibe.  Isn't this completely backwards?
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1 year 2 months ago #86726 by Monde
Replied by Monde on topic Wide Band AF Sensor from Mitchell1 accurate?
We can try testing the theory by driving the sensor lean and rich.
Assuming is never a good thing.

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1 year 2 months ago #86735 by timothy.spencer
Replied by timothy.spencer on topic Wide Band AF Sensor from Mitchell1 accurate?
Yes, that is a good idea. This is a 1.8 l Toyota engine. I also have a 2.4 l Toyota engine and I know it works the normal way where high is lean and low is rich. I can't imagine this little 1.8 l being different, but I can test it, to confirm.

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1 year 2 months ago #86947 by Tyler
Replied by Tyler on topic Wide Band AF Sensor from Mitchell1 accurate?
The part about the upstream air/fuel sensor normally reading from 3.1 - 3.5V is correct enough, yeah. The rest of it is pretty backwards. 
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 I'm guessing the translation from Toyota service info to GM didn't go very well.

Should be: Higher voltage is lean, lower voltage is rich.

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1 year 2 months ago #86951 by timothy.spencer
Replied by timothy.spencer on topic Wide Band AF Sensor from Mitchell1 accurate?
Yeah, I agree, something seems to have gotten lost in translation. I hope people out there who haven't been taught these things by Scanner Danner don't get off on a rabbit trail with that bad info.

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