OnStar Diagnostic Codes

B2455 Cellular Phone Microphone Circuit OnStar
B2462 Global Positioning System (GPS) Signal Error
B2470 Cellular Phone Antenna Circuit
B2476 Cellular Phone Select Service Switch Malfunction
B2482 Cellular Phone Select Switch Range/Performance


B2483 Global Positioning System (GPS) Sensor Circuit Low
B2484 Global Positioning System (GPS) Sensor Circuit Open
B1001 Option Configuration Error
B1004 Keep Alive Memory (KAM) Reset
B1007 EEPROM Write Error
B1009 EEPROM Checksum Mismatch


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