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Maybe u hooked one wire to the temp sender wire heheh

Sounds like. U might be getting noise thru the wires
I would get the power and earth and run them to battery and start car see if it plays up
Ten also run reverse signal to battery positive aswell to replicate it in reverse and see what happens
U might need a noise filter

I wonder y they charge so much for a Lamborghini and use a crappy reverse camera hahahaha