Limp-In Mode
WARNING: This page is about a different car, the 1995 Plymouth Voyager, 1995 Plymouth Grand Voyager, 1995 Dodge Grand Caravan, and 1995 Dodge Caravan. However, it is still accessible from the selected car via links, so may be relevant.
Limp-in mode is the attempt by PCM to compensate for failure of certain components by substituting information from other sources so that vehicle can still be operated. If PCM senses incorrect data or no data at all from MAP sensor, throttle position sensor, coolant temperature sensor or battery voltage, system is placed into limp-in mode and Malfunction Indicator Light (MIL) on instrument panel is illuminated.
If faulty sensor comes back on line, PCM will resume closed loop operation. On some vehicles, MIL will remain illuminated until ignition is shut off and vehicle is restarted. To prevent damage to catalytic converter, vehicle should NOT be driven for extended periods in limp-in mode.