Note on Intermittents
WARNING: This page is about a different car, the 1990 Cadillac Fleetwood and 1990 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
If an intermittent Code F13 is being set, manipulate related wiring while observing BCM data parameter P.2.5. If failure is induced, reading will jump from its normal value to a reading outside range of -29°F to 204°F (-34°C to 96°C). If value displayed by parameter P.2.5 is not reasonably close to actual air temperature at sensor, check for poor terminal contact or replace sensor. To obtain an accurate reading of in-car temperature, the aspirator must draw in-car air past sensor.