will the po600 code for 97 nissan maxima make car idle high

I REMEMBER THAT CODE IT CAME UP WHEN I HAD OBD11 HOOKED UP MO O/D LIGHT HAS TO BE SHOWING ON THE DASH OR THE CAR WILL START JERKING OR PUTTER AN IT HARD TO ACCLERATE I HAVE TO GRAB THE GEAR AN KEEP MOVING IT BACK AND FOURTH TILL THE O/D LIGHT POPS UP BUT WHEN I GET ON FREEWAY AN PRESS THE OD BUTTON ITS FINE NOW THE CAR IS IDLE EXTREMELY HIGH EVEN IN N POSITION COULD THIS BE BECAUSE OV THAT PO600 CODE

More...