1995 Cadillac Eldorado BaseFACTORY OEM SERVICE PROCEDURE

Code P074, Intermittent IAT Sensor Signal: Action

None.

NOTE: Test number refers to number on diagnostic chart. Reference to CHART 3 refers to POWERTRAIN CHARTS.
  1. Checks Code P074 snapshot to determine if an intermittent high or low resistance caused code to set. An intermittent high resistance can be caused by an open in circuit No. 452 or 472. An intermittent low resistance can be caused by a short to ground on circuit No. 472.
Fig 1: Code P074 Schematic, Intermittent IAT Sensor Signal
G95B12741Courtesy of GENERAL MOTORS CORP.
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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.