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.

Manipulate circuits No. 472 and 469, MAT connector and PCM connector while observing PCM parameter P.0.5. If failure is induced, MAT will jump from its normal value to open signal circuit reading of -31°F to -40°F (-35°C to -40°C).

Fig 1: PCM Code E38, Schematic, Open MAT Sensor Ckt

Courtesy of GENERAL MOTORS CORP.

Fig 2: PCM Code E38, Flow Chart, Open MAT Sensor Ckt

Courtesy of GENERAL MOTORS CORP.

Fig 3: PCM Code E38