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.

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

Courtesy of GENERAL MOTORS CORP.

Fig 2: Code P074 Diagnostic Flow Chart, Intermittent IAT Sensor Signal

Courtesy of GENERAL MOTORS CORP.