The car isn't OBD2, but I wouldn't take it to a dealer just yet. Make a flash code reader yourself as has been suggested - it's dead easy and dirt cheap. You'll be able to clear the fault code yourself. You'll certainly have more information with which to diagnose the fault. It's possible that it's nothing to do with the throttle body.
Basically the car's engine management system thinks that there's a fault, and it won't get better until it's told otherwise. It could be simple, it could be related to the throttle body cleaning, it could be a camshaft position sensor, or a knock sensor, or an exhaust emissions fault......or, or, or.......
The only way to know for sure is to read the codes. Luckily you don't anything more than a couple of paper clips, a length of bell wire and a bulb.
Jack
|