Diagnostic Aids

Code 73 will set when signal voltage falls outside the normal range of the sensor and is not due to a refrigerant system problem. If problem is intermittent, check for opens or shorts in the harness or poor connections.

Fig 1: Code 73 Schematic (3.4L (VIN S)) High A/C Temperature

Fig 2: Code 73 Diagnostic Flow Chart (3.4L (VIN S)) High A/C Temperature