GM OBD Trouble Code 87

EEPROM error (flash memory error)

If the ECM detects an internal fault with the EEPROM code 87 will set. The EEPROM is a special "chip" that is installed in the ECM, based on the particular vehicle configuration.

Fault Code Description

  • 87 - EEPROM error (flash memory error)


  • Engine may not start
  • Poor engine performance

Common Problems

  • Internal fault with EEPROM
  • EEPROM incorrectly installed in ECM

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