This water pressure sensor kit taps into the engine blocks cooling passage and converts the pressure readings to an electrical signal that is sent to the engines ECU.
The ECU can then display this data on the tachometer. This sensor kit is optional for Command Link Plus and Command Link, and there are two types depending on model of the engine.
These sensors plug into harness leads that are part of the engines wiring harness. V8 engines come standard with a cooling water pressure sensor.