2005 Chevrolet aveo p0315

Hi I have a Chevrolet aveo 2005 made in Korea with 3410 km , the check engine light is on the result of the diagnostic tool is > DTC: p0315: crankshaft position sensor block error. What does this mean .thanks
Here are a few of the posiblw causes for this code

Inspect for the following conditions:
1 Worn crankshaft bearings
2 A damaged reluctor wheel
3 Debris between the CKP sensor and the reluctor wheel
4 Excessive crankshaft runout
5 A damaged Crankshaft
6 Interference in the signal circuit of the CKP sensor
7 A coolant temperature that is not within the Conditions For Running the DTC
8 The ignition switch is in the ON position until the battery has insufficient voltage
9 An ECM power disconnect with the ignition ON may erase the stored values and set DTC P0315
This is something that a good DIY could not do ,best take it to your local Chevrolet dealer to have this sorted out under the warranties that it should have