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B1440 Diagnostic Trouble Code Discussion for December 2004

Ign 0 voltage loss to BCM

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Trouble Ticket Help Requests for DTC B1440
Help Request Posted
2002 Chevrolet Trailblazer LS 4.2L codes P1633, B1440 VIN: 1GMDT13S42
B1440: Ign 0 voltage loss to BCM. ... with service soon light, 4x4 light, and ABS light on. The VCM, ATC, BCM, and IPC all had a pile of 'loss of voltage' and communication codes. We replaced the ignition switch which fixed most of it. Were now left with P1633 and B1440. They both concern Ign ...
December 30, 2004