See also:

Tachometer
The tachometer displays the engine speed in revolutions per minute (rpm). ...

Check Engine Light
A computer system called OBD II (On-Board Diagnostics-Second Generation) monitors operation of the fuel, ignition, and emission control systems. It ensures that emissions are at acceptable levels ...

Passing
More passing distance is needed when towing a trailer. Because the rig is longer, it is necessary to go much farther beyond the passed vehicle before returning to the lane. ...