Hypertech - Speedometer/Odometer Correction
If you're running non-stock tires, our Speedometer Calibrator can correct the speedometer and odometer for tires up to 54 inches (for most applications). This device is engineered for the speedometer recalibration functions of the Max Energy Programmer, but without the additional expense of the other tuning features. The Speedometer Calibrator also comes with a USB cable and a CD containing software to enable quick updates and upgrades over the internet.
How does it work? Simply plug the Speedometer Calibrator programmer into the vehicle's under-dash connector, select the tire height and new gear ratio, and in a matter of minutes, your vehicle's computer is reprogrammed for accurate speedometer and odometer readings (as required by law). As a result, the automatic transmission may not shift correctly and the speedometer/odometer readings will not be accurate (as required by law). The Hypertech Power Programmer III lets you select different tire sizes and rear gear ratios, then stores that information in your vehicle computer.
In addition, the Speedometer Calibrator reads and clears Diagnostic Trouble Codes (DTCs) or "check engine" lights. This allows you to view detailed information about your vehicles operation without having to purchase expensive diagnostic computers or scanners used by dealership technicians
So if you’ve installed non-stock tire sizes for more grip on the road, even taller tires for more traction on the strip, or a different rear gear ratio, you must reprogram your vehicle computer for correct speedometer and odometer readings, as well as correct part-throttle shifting. That’s because the electronic “brains” in late-model vehicles are programmed to work properly only with the factory-installed tire size and rear gear ratio. The Hypertech Power Programmer III lets you reprogram your vehicles’s computer for non-stock tire sizes and/or rear gear ratios at the push of a button!
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