Ihave opel corsa 2002 model 1.4 litter engine. When I drive the gear not shifting proprly. Some time ok, some time engine RPM moveing high but car is not moving 1st to 2nd gear so I scaned my car the code is P1890. And P1895. This code I dont have any defination, Please any budy tell me what is the meaning of P1890and P1895.