I recently added a ScanGauge to my car. In addition to revealing the true reason behind mysterious “check engine” light, it calculates fuel economy and other statistics while providing a real-time display of data. In the photo of the display are miles per gallon, voltage, intake air temperature, and engine load; there are several other options.
It plugs directly into the On-Board Diagnostic (OBD) 2 port under the steering wheel, so the real installation was mounting the display. Rather than pull apart the center of the dash, I cobbled together some scrap wood that holds the display in the pocket under the radio using Velcro and a stylish coat of black spray paint. The wire passes out of a hole drilled in the back of the pocket and behind the carpet to the OBD-2 port.
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