DTC P1109: Barometric Pressure (BARO) Sensor Circuit Out of Range-High: General Description

The barometric pressure (BARO) sensor is built into the powertrain control module (PCM) and monitors atmospheric pressure. The PCM estimates appropriate intake airflow from the manifold absolute pressure (MAP) sensor output voltage and BARO sensor output voltage. When BARO sensor output voltage is within the specified range, a malfunction is detected and a DTC is stored.