A wideband UEGO sensor controller accurately monitors Air/Fuel ratios during the tuning process to prevent a lean fuel mixture, which could lead to engine damage. AEM's Wideband UEGO Controller is available in single and dual channel modes for everything from four cylinders to V10's, and is the most affordable UEGO sensor controller available. This unit has a very low current draw and features both 0-5V calibrated output and 0-1v calibrated output to mimic the factory narrow band sensor, eliminating the chance of a factory computer issuing a trouble code.