Quote:
Originally Posted by metallicamaster3
Thing is, there's only three O2 sensors. Two upstream and one downstream. The exhaust is not factory, I believe.
And the fault codes are saying that both banks are indicating rich. No idea why it's saying "lack of heated upstream oxygen sensor switch", as if it thinks there's no O2 sensors on there at all??  |
If sensor 2 bank 2 stays at 1.27v, it's dead or there's something going on with the wires for that sensor. You could disconnect it and see if it falls to 0v.
Your base voltage is 0.45v and will swing as high as 0.85v and as low as 0.15v.
I would take a look at long term and short term fuel trims too, to see whats going on there too.
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On a stock exhaust system on fords on all the V6s that I've seen, there should be four O2s, two up stream and 2 down stream of each CAT.
I tell you I'm confused !!