Barometric Pressure Sensor: Testing and Inspection

^ A faulty atmospheric pressure sensor will set code 45 in the on-board diagnostic system.
^ Symptoms of a bad sensor include poor idle and driveability at high altitude, stalling, hard starting, etc.
^ If symptoms plus the presence of code 45 indicate a faulty atmospheric pressure sensor, it is necessary to replace the ECU as a unit. The sensor is an integral ECU component.