My question is about my honda it shakes. on 2011 Honda Civic

Latley when i stop at a red light it starts to shake when i have the air on or not what should i do? Also i have changed my gas to supreme was that a good idea to switch gas like that?

by in Houston, TX on October 11, 2011
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1 answer 1 comment
ANSWER by , October 11, 2011
You car is under warentee I would go back to the dealer it will be covered. If it were and engine misfire or vacuum leak the check engine light should be. It could be an engine mount or the idle control motor not properly controlling the idle speed.
COMMENT by , October 12, 2011
Yes it is under warentee, thank you is this a big problem? Sorry im a girl and dont know anything about cars!