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Q: the dealer says i need emission system service but theres no warnings coming on on 2008 Hyundai Elantra

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is this normal service for a hyundai?
(1) Answer
Unless it is a factory recall then no. The OBD2 system will warn you of a problem that needs to be addressed which will turn on you "Service Engine Soon" light. If you light is not on and its not a recall then there is no action required