Hello ! my 1999 chrysler concorde shows (check

You need to have the codes read to determine what is wrong. Bring it to a parts store, this is a free service. They will plug a hand held scan tool into the cars diagnostic port (under the dash), and 'read' codes stored on the cars computer. They can tell you what the code(s) mean, and suggest how to fix the problem. If you have any questions after that, post the codes and questions (and engine size) here.