Where is the diagnostic port located on my 2001 passat 5 sp. auto V6?

Under the steering column... to the left

Hi. The crankshaft position sensor is located on the intake sector of the engine block, near the flywheel.This will be on the AAA engine build.

On the ABA build, The crankshaft position sensor is mounted on the side of the engine block, near the crank pulley.

could be time for a tune up also check the spark plug holes for oil if the valve cover gasket are leaking into there can also have a bad coil if the check engine light is on have it scanned at a auto parts store (most do it for free)the code can lead you to the bad cylinder exp code p0301 is cylinder number one p0306 is cylinder number six and the same for p0302-p035

Is it auto?? Needs to know you are not starting car in gear

standard TQF transmission oil if auto if manual then EP90

P0411 is an indication of a MAF sensor (mass air flow). A common cause is the vacuum lines conneted to the MAF. A leak or worn vacuum line will throw a P0411. Check the lines going to the MAF (near the air filter). If the lines are good, then replacing the MAF should solve your problem. Best of luck.
Greg

i had this problem on my 2002 passat. it was the ignition coils. first set were replaced in 2002 as a vw recall. second set (at 122K miles) were relatively inexpensive to fix. just one failed but it made the engine run really rough - my mechanic was able to move it from one cylinder to the next to get the problem to repeat.

I think the question is where is the bank 2 precat sensor on the 2.8 v6 passat. I have only found bank 1......????

www.vw.ddsltd.com

Metra makes a preamp harness that you can use if you have the partial Bose system. My A4 had that (where the front speakers were run off of the headunit with speaker-level feed, but the deck put a line level signal to a rear amp to power the speakers). This harness would let you use the aftermarket deck with your factory speakers, if you have the partial Bose system. Best bet is to do a Google search for "Metra 2001 Passat" or something like that and I'm sure it'll show up.