well tonight b4 i got home, the check engine light came on. i was like shit. its just a daily driver and it has 230000 miles. its been supoorting me for the long while my family has owned it. the werid thing is after the light turns on a couple minutes later the D4 light starts to blink. theres nothing wrong phyaically. no over heat. no hesitation, shifts gears fine, i would look into it but its dark and i have no garage. and the weather. all advices are appreciated. thanks