Pcm Code P019 - Shorted Fuel Pump Feedback Signal: Notes
WARNING: This page is about a different car, the 1993 Cadillac Seville and 1993 Cadillac Eldorado. However, it is still accessible from the selected car via links, so may be relevant.
PCM monitors fuel pump feedback voltage for 4 seconds after ignition is turned on without engine being cranked. Fuel pump relay will be energized for 2 seconds and then de-energized. If voltage on fuel pump feedback does not drop to less than 7 volts during first 4 seconds after ignition is turned on (engine off), PCM Code P019 will set, indicating voltage on circuit No. 120 with fuel pump relay de-energized.