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B1260 Diagnostic Trouble Code Discussion for August 2012

Security system data wrong but valid

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Trouble Ticket Help Requests for DTC B1260
Help Request Posted
2003 Saturn L300 3.0L No Start, MIL Lamp on, sercurity light on VIN: 1G8JW54R03
B1260: Security system data wrong but valid. ... said that whenever the service light would come on his tranny would shift funny. Cleared all codes and checksum error for BCM came back. "He" replaced the BCM and then I couldn't get it to flash. Sent it to dealer they said they flashed BCM but cou...
August 28, 2012