Faulty Powertrain Control Module (PCM)
Powertrain Control Module harness is open or shorted
Powertrain Control Module circuit poor electrical connection
Engine Light ON (or Service Engine Soon Warning Light)
The Barometric Pressure (BARO) Sensor is built into the Powertrain Control Module (PCM), and it monitors atmospheric pressure. The BARO sensor output voltage is converted to A/D in the sensor inside and transmitted to a CPU by serial communication. When the signal is not sent from the BARO sensor or when the signal sent from the BARO sensor is abnormal and this condition continues for a specified time, the PCM detects a malfunction and stores a Diagnostic Trouble Code (DTC).