The Barometric Pressure Sensor (BARO sensor) is mounted to the sensor bracket at the rear of the cylinder block just above the flywheel housing. The sensor sends an electrical signal to the ECM indicating barometric pressure. It is electrically connected to the ECM through the engine sensor wire harness. A hose is attached to the inlet of the sensor to protect it form dirt and prevent plugging. The ECM uses the data in controlling fuel delivery to the engine. See Figure 34514 .
1. Barometric Pressure Sensor
3. Ignitor Module
2. Oxygen Sensor Interface Module
4. Sensor Bracket
Barometric Pressure Sensor for Series 50G Engines
The barometric pressure sensor is non-serviceable and must be replaced as an assembly.
Remove the Barometric Pressure Sensor as follows:
Install the BARO sensor as follows:
Use care tightening sensor attaching bolts. Overtightening the bolts will damage the sensor.