MAP sensor is a true absolute sensor, meaning it enable your engine management system to properly compensate for altitude. The pressure inside your intake manifold is extremely important input to the ECU. A quality MAP sensor is crucial to your engines performance. These sensors respond to changes in manifold pressures and relay the information to the ECU in the form of a voltage signal ranging. 3 bar MAP sensors precisely calculate boost pressure up to 43.5 psi gauge (58 psi absolute), while allowing you to have a smooth and repeatable idle. Measurement Error: less than equal +/- 1% Pressure Measurement: less than 43.5 psi gauge (58 psi absolute) Operating Temperature Range: -40 to 267 Fahrenheit (-40 to 125 Celsius) Response: 1ms, 10 to 90% pressure step. Compatible with all aftermarket engine management systems. Pin Out is: A = Ground = Yellow Wire B = Sensor Output = Blue Wire C = +5 Volt Source = Red Wire colour:black Material:ABS Package Contents: 1 * sensor Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.