Pcm Code P073 - Intermittent Coolant Temp Sensor Signal: Action

PCM Code P073 is set. No service message is given.

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

Checks PCM Code P073 snapshot value 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. 410 or 1076. An intermittent low resistance can be caused by a short to ground in circuit No. 410.

Fig 1: PCM Code P073 Schematic - Intermittent CTS Signal

Courtesy of GENERAL MOTORS CORP.

Fig 2: PCM Code P073 Flow Chart - Intermittent CTS Signal

Courtesy of GENERAL MOTORS CORP.