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Re: 2005 Ford F-350 6.0 'wrench' light illuminated on dash
Posted to HD/Fleet Forum on 6/9/2009

Just found this on AllData;

Accelerator Pedal Position (APP) Sensor

The APP sensor is a 3-track potentiometer that is used to calculate driver demand for fuel quantity. The sensor receives a VREF voltage from the PCM and provides a variable voltage signal ... Login to read more.