If it is then it may be caused by 3 things:
#1. Faulty cable - replace the OBD2 Ethernet cable and any adapter cable that you may be using.
#2. Low battery - fully charge your battery and ensure to use a battery charger that does 20-50amps.
#3. Something is blocking your flash - aftermarket CarPlay, piggyback, exhaust valve controller, GPS system, aftermarket alarm system etc.. Physically disconnect them and try once more.
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