Self-Diagnostic System: Notes

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1999 Dodge Ram Wagon, 1999 Dodge Ram Van, 1999 Dodge Pickup, 1999 Dodge Durango, and 1999 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.

If a problem is sensed in a monitored circuit, a Diagnostic Trouble Code (DTC) will be stored in PCM and MIL will illuminate, provided specific criteria are met. PCM will then enter limp-in mode, substituting information from other sources to compensate for component failure. Vehicle is operational in limp-in mode, but driveability may not be optimal.

A specific DTC results from a particular system failure. DTC only indicates problem circuit. It does not identify specific component failure in the circuit.

If problem is repaired or ceases to exist, PCM automatically clears DTC after 40 engine warm-up cycles. DTCs can also be cleared using scan tool. See CLEARING DTCS .