Self-Diagnostic System: Monitors: Notes

WARNING: This page is about a different car, the 2003 Dodge Intrepid, 2003 Chrysler Intrepid, 2003 Chrysler Concorde, and 2003 Chrysler 300M. However, it is still accessible from the selected car via links, so may be relevant.

There are electronic circuit monitors that check fuel, emission, engine and ignition performance. These monitors use information from various sensor circuits to indicate the overall operation of the fuel, engine, ignition and emission systems and thus the emissions performance of the vehicle. The fuel, engine, ignition and emission systems monitors do not indicate a specific component problem. They do indicate that there is an implied problem within one of the systems and that a specific problem must be diagnosed. If any of these monitors detect a problem affecting vehicle emissions, the Malfunction Indicator Light (MIL) will be illuminated. These monitors generate Diagnostic Trouble Codes that can be displayed with the MIL or a scan tool. The following is a list of the system monitors:

Misfire Monitor
Fuel System Monitor
Oxygen Sensor Monitor
Oxygen Sensor Heater Monitor
Catalyst Monitor
Evaporative System Leak Detection Monitor (If Equipped)
EGR Monitor

All these system monitors require two consecutive trips with the malfunction present to set a fault. For diagnostic procedures, see SELF-DIAGNOSTICS - CONCORDE, INTREPID & 300M article.