Original Dual Wide Band EFIE Basic

This product is our original dual wide band EFIE. It was the world's first EFIE that was designed specifically for use with wide band oxygen sensors. It has 2 wide band EFIEs only. These will only work on upstream sensors in vehicles fitted with wide band oxygen sensors.

All wide band vehicles that we have analyzed to date, use narrow band o2 sensors for sensors downstream from the catalytic converter. We therefore recommend using our new Quad Wide Band EFIE Basic, or the new Dual Wide Band EFIE Basic. These have both wide band EFIEs for your upstream sensors, and narrow band EFIEs for your downstream sensors. Only use this product if you already have your downstream sensors handled with separate narrow band EFIEs.

The EFIE will work with all types of wide band and AFR (Air/Fuel Ratio) sensors. To be clear, it is the EFIE of choice for both 4-wire and 5-wire oxygen sensors. Also note there is a variation of the 5-wire sensor that uses 6 wires.

This model comes in a mountable box, and encased in protective plastic. The wiring is 18 gauge, with quick disconnects that can unplug from the device for easy installation. It has one potentiometer that controls the signal adjustment for both sensors. An LED shows when the unit is powered up.

These units have a start up delay of about 45 seconds. After approximately 25 seconds the unit will start ramping up. At 45 secs it will reach it's full adjustment to the sensor's signal. This delay is by design so that the fuel mix will be richer during engine start up.

This unit is highly precise. It's signal drift is less than 1% across it's entire operating temperature range, which is -40C to 125C (-40F to 257F). "C" = degrees Celsius and "F" = degrees Fahrenheit.

Installation instructions can be found here.