Make : VOLKSWAGENModel : JETTAYear : 2003Manufacturer : VOLKSWAGEN OF AMERICA, INC Service Bulletin Number : 01 08 14Date of Bulletin : MAR 27, 2008NHTSA Item Number : 10024548 Component : POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM, PCM)Summary :
UPDATE PROGRAMMING, MIL ON, DTC'S P0420 AND/OR P0300-P0306 STORED IN ECM FAULT MEMORY. *NJ


Has anyone had this preformed on there car, i ve got the code wich is a misfire on cylinder 4? i was thinking maybe mass airflow because those are usually bad news on a jetta, has anyone ran in to this problem?

 

Check your plug wires i had something simular hapen to me in found that one of the wires was not seated right on the plug.

Good luck