Code 54, Fuel Pump Circuit

Code 54 will set if ECM does not see 12 volts on fuel pump signal voltage monitor during the first 2 seconds after ignition is turned on.

Fig 1: CODE 54, Schematic, Fuel Pump Cir. (5.7L C,K & P Series; 5.0L & 7.4L C & K Series; All W/ M/T)

Fig 2: CODE 54, Schematic, Fuel Pump Cir. (5.0L & 5.7L C & K Series W/ 4L60E Trans.)

Fig 3: CODE 54, Schematic, Fuel Pump Cir.(5.0L & 5.7L G Series W/ 4L60E Trans.)

Fig 4: CODE 54, Schematic, Fuel Pump Cir.(All Models W/ 4L80E Trans)

Fig 5: CODE 54, Flowchart, Fuel Pump Circuit