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Code 14: (Atmospheric Pressure Sensor)

WARNING: This page is about a different car, the 1994 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Trouble Code No. 14 Diag. Chart (Atmospheric Pressure Sensor)
G90H21581Courtesy of MAZDA MOTORS CORP.