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GM OBD Trouble Code 87

By Jim Taddei, May 1, 2009

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)

Symptoms

  • Engine may not start
  • Poor engine performance

Common Problems

  • Internal fault with EEPROM
  • EEPROM incorrectly installed in ECM

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