ok so i have an 09 n54 135i i just purchased an n54 cobb ap unit v2 used. problem is my car is at dealer i plugged the module in an e46 m3 to see of it works and it did so i checked to nake sure it was unmarried and it was, but when i was trying to read codes it said something about cable information or no communication i tried my vw same thing. is this normal? does it only work for n54 in order for it to communicate
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