See also:

Onboard Diagnostic System — OBD II
Your vehicle is equipped with a sophisticated onboard diagnostic system called OBD II. This system monitors the performance of the emissions, engine, and automatic transmission control systems. ...

Points To Remember
NOTE: When the vehicle is stopped after a few miles (a few kilometers) of operation, you may observe vapor coming from the front of the engine compartment. This is normally a result of moisture ...

Adding A Trailer Hitch
The weight of a trailer/hitch may affect the performance of ACC. If there is a noticeable change in performance following the installation of a trailer/hitch, or if the ACC performance does not ...