Basic Function Of Engine Oil Pressure And Temperature Sensor - GF18.40-P-2004A

Engine All (4xWD) 

Engine All (CAR) 

Sample illustration of engine oil pressure-and-temperature sensor 

Courtesy of MERCEDES-BENZ USA

Overview 

This document contains information on:

• General 
• Function 

General 

The engine oil pressure and temperature sensor (1) monitors the oil pressure and temperature of the engine oil.

Function 

A piezoresistive sensor element and electronics system for signal boosting and temperature compensation are integrated on a micromechanical chip. The pressure and temperature of the engine oil are routed via a connection fitting to the underside of the diaphragm of the sensor element, where it is measured.

By integrating a cap chip, the engine oil pressure and temperature sensor (1) is used to measure absolute pressures. The engine oil pressure and temperature sensor (1) transmits the recorded data to the combustion engine control unit.

	Component description
		Engine oil pressure and temperature sensor, component description Engine 256 in model 223	GF18.40-P-4102A
		Engine 254, 654 in model 206	GF18.40-P-4102C
		Engine 139 in model 232	GF18.40-P-4102F
		Engine 254, 654 in model 254	GF18.40-P-4102H
		Engine 254, 256, 654, 656 in model 214	GF18.40-P-4102K
		Model 118, 177, 247 as of model year 2023	GF18.40-P-4102L
		Engine 256, 654 in model 167 as of model year 2023	GF18.40-P-4102M