drx604

I had this problem for a few weeks... got a tune up... and the mechanic told me I had partial misfiring of one of my cylinders...after the tuneup he told me that one of my coil packs was completely dead. It ran like crap... chugging along on the road. I got them replaced as per my recall by the dealership. The car was running fine.

The dealership told me they scanned the car after the coilpacks were replaced... and I still have the following codes

SAE / VAG
P0411 / 16795 Secondary air system: throughput faulty
P0420 / 16804 Bank 1, catalytic converter system: not effective enough
P0422 / 16806 Bank 1, main catalytic conveter: not effective enough
P0441 / 16825 tank ventilation system: throughput faulty

so I don't have another appointment for a week and a half (not many dealerships in the area)...
my car is still just stalling/shutting down on it's own at idle (ie at stop lights). Also... when that occurs or if my car has been parked for a long time... it is difficult to start (the engine still cranks). It eventually starts.

The catlytic converter I can get replaced under warrenty (130000km/8years) ... but I am past the regular warrenty (100000km/5years) so I will have to pay for other things.

I don't suspect any electrical/battery issues ... it seems to be possibly related to this tank ventilation issue??? I don't know?

What could be the problem? how can I get it corrected... and most important... how much will this cost?

Any advice/help is appreciated