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GM OBD Trouble Code 53

System voltage too high

Digital EGR valve solenoid 1 error

  • Depending on the model, code 53 can refer to two different systems.
  • Please choose from one of the above links for specific information on each system.

System voltage too high

The ECM monitors the operation voltage of the electrical system. If the system voltage goes over a preset limit code 53 will be set.

Fault Code Description

  • 53 - System voltage too high

Symptoms

  • Erratic performance of the electrical system components
  • Erratic engine performance

Common Problems

  • Failed ECM
  • Failed voltage regulator (internal to alternator)

Digital EGR valve solenoid 1 error

On vehicles with three solenoid EGR valves an open or short on the solenoid 1 circuit will set code 53.

Fault Code Description

  • 53 - Digital EGR valve solenoid 1 error

Symptoms

  • EGR solenoid 1 will not function

Common Problems

  • Broken wire to EGR valve
  • Faulty EGR valve

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