1992 Cadillac Seville BaseFACTORY OEM SERVICE PROCEDURE

Note On Intermittents

Manipulate affected wiring and connectors while observing PCM parameter ED02. Apply and release vacuum to MAP sensor vacuum port using a vacuum source. If PCM parameter ED02 displays greater than 108 kPa, condition has been induced and intermittent should be repaired. If wiring and connectors are okay, substitute a known good sensor, and retest.

Fig 1: PCM Code E031, Schematic, Shorted MAP Sensor Circuit
G92J05016Courtesy of GENERAL MOTORS CORP.
Factory Service Tools

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When to See a Mechanic

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

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

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