2000 Passat what is DTC's P0306?

Tube Audio · 2009-02-02T19:35:19+00:00

HiJust had a 200 V6 Passat at the dealer, and this is the report (see below).I understand the bad plug and Thermostat and leaky gaskets but what isDTC's P0306?ThanksChecked system and found multiple faults in system P1296 Malfunction in Cooling System, checked and found thermostat stuck open causing malfunction, also found DTC's P0306 Misfire detected cylinder #6, checked and found worn spark plug and has oil due to valve cover gasket and chain tensioner gasket is leaking. Recommend replacing thermostat $503 and spark plugs $227Valve cover gasket and chain tensioner gaskets covered under powertrain warranty but repairs take 4-5 day's

Feb 02, 2009 24 Replies

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sligoNoSPAMjoe 17 years ago

Even non-electronic systems may use vacuum controlled vents. It could be a vacuum problem.

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Tube Audio 17 years ago

where is cylinder # 6, is it the left (drivers side) towards the radiator or firewall

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dave AKA vwdoc1 17 years ago

I think you are right! If the a/c is set on Recycle then flaps will close off the external air inlet. I can't think of any other vacuum vents though. Which other vents on a 2000 Passat would be vacuum controlled with the mechanical controls that would cause the OP's problem? That is if it is even an "air flow" issue! ;-)

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