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Fault Codes for '02 VW Passat

In a previous post (http://act… had noted my initial symptoms that my V6 Passat has sounding like a diesel - although it is not! The sound is definitely under the hood - possibly the engine. It’s a steady sound that’s gotten progressively worse! I had the VAG-COM connected at Joe’s VW shop in Dedham, MA (GREAT GUY!) and the faults I got were:

16684 - Random/Multiple Cylinder Misfire Detected

P0300 - 35-10 - - - Intermittent

16688 - Cylinder 4 Misfire Detected

P0304 - 35-10 - - - Intermittent

16687 - Cylinder 3 Misfire Detected

P0303 - 35-10 - - - Intermittent

16690 - Cylinder 6 Misfire Detected

P0306 - 35-10 - - - Intermittent

16891 - Idle Control System RPM Higher than Expected.

P0507 - 35-10 - - - Intermittent

Any thoughts or ideas what this could mean!?!

What was the last thing that was done to the car before the misfires started?
Did you have a tune up done?

Since the codes aren’t from a common bank of cylinders, the first thing I would do would be to pull off the ignition coil sticks and spark plugs, take a look at their condition, then snap everything back together tightly, and see if the misfire issue vanishes.

If it does persist, then I would swap those three coil sticks with the other three cylinders, and see if the problems follow the coil sticks, or stay put. That would then lead to further choices.