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)

Symptoms

• Engine may not start
• Poor engine performance
  

Common Problems

• Internal fault with EEPROM
• EEPROM incorrectly installed in ECM