When you get your vcds do a full clear down , thing with the 8's they pull out lots of amps with ignition on so we put them on battery support whilst doing full scans but you could do most of it with engine running ,) but some codes will not clear while running so just clear them with ignition on .
Good call getting the M O S T prism , the common modules for network corruption are amplifier ( like already said) and phone module and I've seen Bluetooth module pulling network down aswell so they would be the first modules to go at for the bypass loop .
Also when you get your vcds we can go through coding the battery in and unlocking the aux . heater in the adaptions blocks
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