DTC P0107: BARO Sensor Circuit, Low Input: Condition

WARNING: This page is about a different car, the 2002 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.

DTC is set when Powertrain Control Module (PCM) detects input voltage from EGR boost sensor is less than .01 volt with engine running. This is a continuous monitor. MIL is illuminated when PCM detects malfunction during 2 consecutive drive cycles. Possible causes are:

EGR boost sensor malfunction.
Short or open circuit between EGR boost sensor and PCM.