P1236 FUEL PUMP CONTROL OUT OF RANGE ? NOT ABLE TO FIND MUCH ON THIS. THE FUEL PRESSURE IS SLOWLY DROPPING JUST SIT IN THE DRIVE WAY LIKE THE LIFT PUMP NOT DOING ANYTHING . BUT THE LIFT BEEN WORKING GREAT FOR MONTHS NOW IM DOUBLE FUSES AND CONNECTS NOW . IM WONDERING IF THE CP4 IS ABOUT TO FAIL .

 

Just wondering did you find anything on this code? My truck started today missing just a lil bit when I was accelerating I didn't pay it no mind until I got this code and truck started sounding like a tractor.