Dodge Neon OBD1 Codes Code 21

My 95 Neon Jerks And Sputters When Trying To Accelerate Computer Codes 21 And 32 Will The Oxygen Sensor Cause This Problem

I Have A Code 21 On A 95 Neon, Do You Know What This Is?

My Car Has Been Acting Up While Driving, It Will Slow Down Like It Was Abt To Die, Last Week I Went To The Mechanic, He Checked The Car And...