Trouble CodesGM OBD Trouble CodesGM Code 54

CODE 54 - Fuel Pump Circuit

Fuel pump circuit low voltage

The ECM monitors the voltage to the fuel pump from the fuel pump relay. If the voltage is below specification code 54 will set.


  • Engine may not start

Common Causes

  • Failed fuel pump relay
  • Failed ECM

Trouble Code 54 is not used by the turbo cars. If this code does appear, it is probably due to a loose connection or bad ground. If a computer is connected to the car's ALDL connector when the code appears, check the computer cable connections.

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