Note On Intermittents

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 205°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, aspirator must draw in-vehicle air past sensor.

Fig 1: BCM Code F13, Schematic, In-Vehicle Temperature Sensor

Courtesy of GENERAL MOTORS CORP.

Fig 2: BCM Code F13, Flow Chart, In-Vehicle Temperature Sensor

Courtesy of GENERAL MOTORS CORP.

Fig 3: BCM Code F13