Ya they told me that when I changed my CAI (I forgot to disconnect the neg on the battery) so my engine light came on when I reinstalled the new one. At the time I didn't know how to reset so I took it into them and they said it was my Aftermarket CAI. But they didn't give me much crap. The thing they really warned me about was the modded wiring that the previous owner did that caused all the speedometer problems and what not, they told me if I did it again they would void it.