Note On Intermittents

This code can be caused by an open, short to ground or short to voltage on circuits No. 472 and/or 469, an 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 EO74, Schematic, Intermittent MAT Sensor Signal

Fig 2: Flow Chart & Temp. Sensor Voltage Chart , PCM Code EO74, Intermittent MAT Sensor Signal