Contour Enthusiasts Group Archives Forums Modifications Duratec Performance What's a MIL eliminator?

The Malfunction Indicator Lamp is the "Check Engine Light" on your dash. The MIL eliminator is a resistor and capacitor wired in to the harness of your downstream O2 sensors to electronically simulate a properly working O2 sensor and light off cat. With the headers, the light off cats are replaced with open pipe and would result in an out of spec reading from the downstream O2s if the MILs were not in place.