Barometric Pressure (BARO) Sensor
WARNING: This page is about a different car, the 1995 Ford Aerostar. However, it is still accessible from the selected car via links, so may be relevant.
Faults in barometric pressure sensor or circuit should set a diagnostic trouble code. Proceed to QUICK TEST in the appropriate TESTS W/CODES - EEC-IV (3.0L) article. If no service code has been set, see CIRCUIT TEST DF in TESTS W/CODES - EEC-IV (3.0L) article for sensor specifications.