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most OBDII tests (which is what your vehicle should require) do a scan through the DLC for any systems not complete, DTC's or the presence of a MIL (or CEL). OBDII tests fail for any number of reasons, not complete systems coming from resetting a battery and not allowing enough time for the system reset, and with DTC's you can have one of those for any number of reasons. and hopefully a CEL would be obvious. assuming the HKS is your only mod, or at least as long as you have no CEL because of DTC'S you should pass any OBDII test.