My cel is on and code is P0343 (crankshaft sensor high imput!?!?)

Can someone explain me what does it mean?
The CEL came on yesterday, nothing seems to be wrong, my engine still run well.
I own a 2000 sportage 4x4 EX 130 000km

thanks


4X4 Sportage 2000, Warn manual Lock,BF M/T 30x9.5