How does DashDyno measure wideband air/fuel ratio (AFR)?

DashDyno measures air/fuel ratio in one of two ways. First, if the vehicle is factory equipped with a wideband O2 sensor then DashDyno reads AFR directly from the vehicle ECU. If the vehicle has a narrow band O2 sensor, then an external wideband controller is required (such as the Innovate LC-1 or LM-1).

The analog output of the wideband controller is connected to the analog input on DashDyno. Once connected, air/fuel ratio can be viewed on-screen and recorded with all the other sensors. More.

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