check your ecu for error codes, that should help you.

any noticable difference in the car performance wise?

a similar thing happened when my mate put too much oil in his civic, once it warmed up the engine light game on (i guess coz the oil expanded with the heat?)

it would be impossible for someone to tell you from that info what ur prob could be, so yeah i'd say check ur ecu before you take it to a mechanic