This may not be a new issue, it may just be that I never noticed it before. But sometimes when I hit a bump in the road, the engine stumbles a little bit on acceleration, and then an instrument light shaped like a wrench shows up. it doesn't happen all the time just when i hit particularly hard bumps. I'm assuming something is loose.

 

Something you could try.

Autozone will check your vehicle for any codes usually at no charge.

Before buying anything,,,,,,,,,,,,,,,,,,,,,,,if you can , post the code(s) on this forum and just maybe we might be able to save you some problems.
I believe they might provide a print out , get it, and also get a second and even a third opinion here or wherever you choose before buying anything. How do you feel about that?