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it failed—was the voltage too high, or is the data just drifting?. The History Vault
and World Wide Harmonization (WWH) of On-Board Diagnostics (OBD). sae j193973 pdf exclusive
When a fault condition resolves, it moves from DM1 to the DM2 log. This historical record is invaluable for technicians diagnosing intermittent electrical or mechanical issues. DM3: Clear Previously Active Faults (PGN 65228) it failed—was the voltage too high, or is
