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Home >> Cadillac >> 1991 >> DeVille Touring >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Pcm Flow Charts Codes E12 To E99 >> Pcm Code E74, Mat Sensor Signal Interrupt >> Note On Intermittents
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Note On Intermittents

This code can be caused by an open, short to ground or short to voltage on circuit No. 472 and/or 469. Also check for open or short in sensor connector, engine-to-dash connector or PCM connector. If no problems are found in wiring or connectors, substitute a known good sensor and retest.

Fig 1: PCM Code E74, Schematic, MAT Sensor Signal Interrupt
G90F17264