Pcm Code P074 - Intermittent Intake Air Temp Sensor Signal: Action

None.

NOTE: Test number refers to number on diagnostic chart. Reference to CHART 3 refers to POWERTRAIN CHARTS.

Checks PCM 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. 476 or 472. An intermittent low resistance can be caused by a short to ground on circuit No. 472.

Fig 1: PCM Code P074 Schematic - Intermittent IAT Sensor Signal

Courtesy of GENERAL MOTORS CORP.

Fig 2: PCM Code P074 Flow Chart - Intermittent IAT Sensor Signal

Courtesy of GENERAL MOTORS CORP.