Code P073, Intermittent Engine Coolant Temperature Sensor: Action

None.

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

Checks 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 circuit No. 808. An intermittent low resistance can be caused by a short to ground in circuit No. 410.

Fig 1: Code P073 Schematic, Intermittent Engine Coolant Temp. Sensor

Courtesy of GENERAL MOTORS CORP.

Fig 2: Code P073 Diagnostic Flow Chart, Intermittent Engine Coolant Temp. Sensor

Courtesy of GENERAL MOTORS CORP.