2004 sentra se-r spec v stalling help!!!

i have a spec v with 46,000 miles. i just got a full synthedic oil change like 20 miles ago. yesterday i decided to add RESTORE formulated for 4 cylinder motors. ever since then my car stalls randomly and motor doesnt rev as quick.... any ideas, i need help fast

so i just took it to autozone to get the codes read and they say its the camshaft positioner sensor in bank 1... cylinder 1. so how bads the damage and cost for a shop to take care of it

one more thing... i'm not sure where the sensor is but i think i located it on the rear of the motor on the passanger side right above the cv axle... is this correct?

it is on the rear of the camshaft opposite the timing cover, should be a green connector i believe

so what i did is disconnected the battery for 15 mins so the check engine light is off and it stayed off. but i dont feel like the car is performing at its best, should i still replace the sensor even tho the check engine light is staying off????

i would, but see if you can see the trigger wheel on the back of them cam when you pull it out, inspect it for wear or gunk, and please for the love of god dont put any restore products in your motor ever again

any quick tips on how to remove this sensor

deep socket and pb blaster....