So i have a 1999 328i and i replaced the camshaft sensor on it cause i was bad. but o

[sergio0622]

okay so my car would sometimes lose power it turned out it was the camshaft sensor by the intake. so i bought it and replaced it, problem solved. but like 2 weeks later on morning i got inside my car to go to work and the check engine light came on with the ACS and the EML light. i pulled of the car seem to have to power at all it would take 4 ever to take off and would not go over 40 mph. i drove it like that to my job and once i got there i turned off the car for about 10 min and the car was back to normal i scanned the car and i got code P0120 and i erased the code and the problem went away a week later i went to the dentist and when i got back inside me car the same lights came on, i drove back home and i turned off the car and 3 hours later the car was back to normal. and today i was on a red light and as the light turned green i stepped on it hard and the lights came back on, and now i have codes P0120 and P0601what can the problem be i need help!!!