Two problems related to electrical system have been reported for the 1999 Plymouth Neon. The most recently reported issues are listed below.
Fuel gauge suddenly drops to empty. Even after a complete tank refill. It would seem to be an electrical malfunction in either the sensor or dash gauge itself. It can be "cleared" from being stuck on empty by shutting off the engine and then restarting it.
The contact owns a 1999 Plymouth Neon, while driving approximately 35 mph, the vehicle overheated and the temperature gauge indicated hot. The contact attempted to shut off the vehicle, but the ignition key was too hot and failed to remove from the vehicle. The vehicle was taken to an independent mechanic, but the repairs were unknown. The failure recurred. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was 173,000. The VIN was unavailable.