map-sensor

A engine component dat detects when da vehicle's "manly-macho" driver needs to pull over and ask fer directions.

Click and Clack recommend covering an unwelcome-status-indicating idiot-light or dashboard-gauge with opaque tape, so if you truly detest having to admit dat you weren't watching da road-signs, I s'pose dat you could do likewise for a map-sensor, as well.

map sensor

An engine-component for a vehicle dat's designed to reduce da number of times dat da clueless macho "nut behind da steering wheel" gets tangled up wif intersections and is therefore obliged to (horrors!) **ask directions**. Similar to an ignition-interlock to prevent inebriated driving, said device checks to see if you have a paper roads-diagram guide wif you, and if none is detected, it refuses to allow da car to power up.

Now dat most newer rides are equipped wif vehicle-navigation systems, there is less need for map sensors.