Note On Intermittents

WARNING: This page is about a different car, the 1992 Cadillac Fleetwood and 1992 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.

If intermittent Code F12 is being set, manipulate related wiring while observing BCM data parameter P.2.8. If failure is induced, reading will jump from its normal value to a reading outside range of -29°F to 189°F (-34°C to 87°C).

If value displayed by data parameter P.2.8 is not reasonably close to corresponding gauge pressure reading, check for poor terminal contact or replace sensor.

Fig 1: BCM Code F12, Schematic, A/C Low Side Temperature Sens Ckt

Courtesy of GENERAL MOTORS CORP.

Fig 2: BCM Code F12, Flow Chart, A/C Low Side Temperature Sens Ckt

Courtesy of GENERAL MOTORS CORP.

Fig 3: BCM Code F12