July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

A/C Pressure Sensor

For Air Conditioning (A/C) pressure sensor testing, perform appropriate A/C pressure sensor diagnostic test. See the following:

On 4.7L, see DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - DURANGO - 4.7L article.
On 5.9L, see DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - DURANGO - 5.9L article.