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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 Circuit

Courtesy of GENERAL MOTORS CORP.

Fig 2: Code 54, Flow Chart, Fuel Pump Circuit

Courtesy of GENERAL MOTORS CORP.