Faulty Instrumentation Control Module
Instrumentation Control Module harness is open or shorted
Instrumentation Control Module circuit poor electrical connection
Engine Light ON (or Service Engine Soon Warning Light)
ETS Warning Lamp Circuit Shot To Ground is the generic description for the P1678 Volkswagen code, but the manufacturer may have a different description for your model and year vehicle. Currently, we have no further information
about the P1678 Volkswagen OBDII code.