2000 vw bug

Question

i have a 2000 vw bug I put a timing belt and a head on a week ago was running fine now im getting 4 different codes they are p0102 p1543 p0341 p0122 what would cause all these codes at same time

Answer 1

P0102 MAF circuit low input

P1543 Angle sensor -1-For throttle drive signal too small

P0341 Camshaft position sensor Bank 1 or single sensor

P0122 Throttle pedal position sensor / switch A circuit low

Somehow the connection is not making proper contact, the camshaft position sensor and the throttle valve share the same reffernce voltage. there all connected to a poor mating connection.