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 circuit No. 472 wiring, MAT sensor and PCM connector while observing PCM parameter P.0.5. If failure is induced, manifold air temperature will jump from its normal value to shorted reading of 288-304°F (142-151°C).

Fig 1: PCM Code E37, Schematic, Shorted MAT Sensor Ckt

Courtesy of GENERAL MOTORS CORP.

Fig 2: PCM Code E37, Flow Chart, Shorted MAT Sensor Ckt

Courtesy of GENERAL MOTORS CORP.

Fig 3: PCM Code E37