Pressure sensor -1 bar to 9 bar for 5v output from ECU. Works well with oil, water, gasoline or ethanol* This is a genuine Honeywell sensor with the highest quality. 1 - Ground 2 - + 5V 3 - Signal to ECU In order for your sensor to have as long life as possible, we recommend that you do not mount the sensor directly on the engine block as stronger vibrations can shorten the sonsor life considerably. * There is no sensor specifically made for the use of ethanol. Therefore, the service life will vary when using the sensor together with ethanol