2002 pontiac sedan 4door 2.2l

Was coffee or soda spilled on to the shifter of your 2002 Pontiac Sunfire. That is the most common cause for a sticking shifter, and yes a sticking shifter can cause both of your concerns. It is sometimes possible to remove the shifter and wash it under hot water to remove the sticky residue. If that does not work the shifter may need to be replaced to correct the issue.