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OBD2 Mode 9 Calibration ID and Numbers
This mode really only serves one general purpose with a few sub-modes: Lock/Assign the ECU to a particular VIN Display the CALID or CALibration IDentification which is basically the …
Is the Calibration Verification Number (CVN) unique
Jul 10, 2017 · The CVN is not unique across all cars, at least this is my understanding. As spelled out from this forum post: CVN stands for "Calibration Verification Number", this is a fancy …