My 2002 VW Jetta 1.8t with 105k miles has been misfiring randomly with codes P0202 P0302 P0300 P304 C0000 on the OBDII. The engine will run fine for 5 minutes then misfire for 20 minutes then run fine again for 2 minutes, then misfire again. The ignition coils were replaced, the spark plugs are fairly new, I just replaced the fuel filter and put a bottle of fuel injector cleaner in the tank but that didn't seem to do much.
I know the codes mean the following:
P0202 Cylinder 2 Injector Circuit Malfunction
P0302 Cylinder 2 Misfire
P0300 Multiple Misfire
P0304 Cylinder 4 Misfire
C0000 Vehicle Speed Information Circuit Malfunction
Anyone have any idea other than buying a new fuel injector. I'm getting a misfire on 4 but there no injector malfunction reported on that one so I'm not sure if it's the injector itself. I don't have any idea where the C0000 is coming into play.