Hello, took my 91 Honda Accord ex to mechanic due to intermitent "check engine" light coming on. The readout is code 43 but mechanic couldn't really find any trouble related to code 43. The front end of the car bumped a curb prior to all of this happening, maybe only coincidence. What could the problem be? How can the engine light be reset so that if a truly major problem occurrs I won't think it's just a code 43?