Hi every 1! New to this forum so please, bear wit me. I recently purchased a 00 concorde lx and the check engine light is on. Took it to autozone for free light check and got a code 0456. Replaced gas cap but light is still on. Does anyone know the most common fix for this problem? I don't know a thing about cars and I'm trying to get a heads up before taking it to a shop for repairs. I'm an easy target, being a female and all, & I will be highly pissed if I'm duped out of my money. Any & all suggestions would be appreciated, thanks.

 

there is not one magic fix for thoes it could be the LDP pump,hoses cracked things along that line. That code is for a whole system not just a single part or location.