My '01 has been throwing 0122 codes, turn the vehicle off then back on and I was good to go. Driving on the highway and got a dead pedal. Tried off and on didn't work. New code 0123. Figured it was time to replace the TPS. Installed the new TPS but the voltmeter read 480. Adjusting the idle screw did nothing. Should be between 580-670. Whats going on?

 

I dunno if this will help but its worth a shot. Mopar1973Man's Dodge Cummins Articles - APPS Sensor Voltage Adjustment