i have a 01 vw beetle 2.0L non turbo, i recently had a code p1296 and p0321, i replaced the cooland sensor with the updated one and the cfank sensor with a updated one also since it started to hesitate and jerk while driving and the dealer told me the po321 was causing that and recommended to replace the crank sensor, so i had those replaced and the next day the check engine light showed up and it started to hesitate and jerk aain and the same two codes showed up, what else should i replace?