Note On Intermittents

1991 Cadillac Seville STSSECTION 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
G91E07541
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.