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this would adjust the fuel trim by 'tricking' the O_{2} sensors into doing the right thing.
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Higher O2 in the exhaust will cause the engine to enrich not lean out. O2 sensor are a voltage generator. they compare the O2 in the exhaust to the O2 in the atmosphere and generate a small voltage up to 1.2 volts. The higher the voltage the LOWER the O2 in the exhaust. There are some O2 sensors that vary the resistance but the FEH uses the generator type. Toyota does on some of their cars use the resistance type though I dont know if the Prius uses this type.
Ducit Amour Hybridae
Mark Smith
Master Certifited Technician
Tempus non reparabilis fugit
"It isn't pollution that's harming the environment. It's the impurities in our air and water that are doing it."
Best Tank 35.0 MPG
