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International Automotive Technicians Network
Re: P0731 code
Posted to HD/Fleet Forum on 4/11/2018

The speed sensors are a Hall-Effect sensor with an output range that alternates between normal high and normal low voltages as the tone wheel rotates. HI Voltage Over 1.20V / LO Voltage Under 0.80V. A DSO is the best way to check the sensors.

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