Faulty Odometer

Since there are 9 digits being used, 1,2,3,4,5,6,7,9, and 0, we can use base 9. We can replace all the 9's with 8's and then convert the number found from base 9 to base 10. For example, if the odometer displays 19, then we replace the the 9 with 8 to get 18, and then convert $18_9$ to base 10, which will give $17$ kilometers. This can be verified by seeing that it will skip 8 and 18 kilometers, and therefore be 2 kilometers higher than the actual amount. With 2197 we can replace the 9 with an 8 to get 2187, and then convert $2187_9$ to base 10. $2187_9=2*9^3+1*9^2+8*9+7=1458+81+72+7 =\boxed{1618}$