The engine revs may stay high due to a program glitch in the engine control computer. If the engine is not turned off when the vehicle is stopped, the high revs may continue. If this occurs, the temperature underneath the floor may rise above normal, in which case the plastic fuel tank, the electrical wiring, and the sheath of the parking brake cable may melt, and at worst this could lead to fuel leakage, engine stall, or a malfunction of the parking brake and so on.