Self-Diagnostic System: Notes
WARNING: This page is about a different car, the 2003 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
Powertrain Control Module (PCM) monitors several different circuits of engine control system. If a problem is sensed with a monitored circuit, PCM will store a Diagnostic Trouble Code (DTC) to aid technician in diagnosis of system. A scan tool is used to read DTCs. For additional information, see appropriate SELF-DIAGNOSTICS article.