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Posted on Jan 02, 2017
SOURCE: check engine
there is a common problem with this generation jetta. on the crankcase ventillation system you will find a y-shaped piece of rubber that is prone to disintergration and leaks. check it out and if that is the problem replace it. to reset the light (and you should try to keep this in mind for future use as most of the time that the check engine light(MIL) comes on in these vehicles there is nothing wrong and no codes stored) park the car with the engine running. Open the drivers side door and remove the fuse box panel cover. You will see a series of fuses in there but you need only to focus on the mini ones on top. The fuse you need to pull is the third row down from the top in the centre and is a 10 amp fuse (i believe it is marked as MIL on the fuse directory). Pull it out with the car running. The car will stall out but that is perfectly ok...no harm done. Re-insert the fuse close the panel and restart the engine. The yellow light of doom should now be out. If the light comes on again rather quickly there is probably a fault code stored. Everyone who owns a VW should own their own OBD(On-Board Diagnostics) tool. www.obdtool.com has one specifically for VW's from 1996 to present for around $75.00 and an optional software upgrade for a little more. It only requires that you own a computer to use it (which I believe most people have nowadays). A shop charges you for each time they pull your codes so the first time you use it will pay for itself. Also if you have friends/acquaintances with VW's im sure they'd rather give you $30-40 dollars to pull the codes than give a shop $80. And you can reset the light with the tool. Another more unlikely cause of your light and shake is the MAF(Mass Air Flow) sensor but you would need the diagnostic tool to check or swap it with another Jetta owners known good MAF sensor.
Posted on Jul 20, 2008
hi with the engine running at idle .get a multimeter and check for a voltage of between 13.5 volts and 14.7 at the battery terminals lower than 13.5 or higher than 14.7 replace alternator.
Posted on Oct 31, 2008
change your spark plugs first ngk or better.30-50$. ... a good air filter 10-45 $ k'n is best
your shake problem is gas or air related..
Posted on Nov 08, 2008
The flashing is telling you that the engine is mis-firing, the dealer will run a test to determine the cylinder that is mis-firing, chances are it is something simple
Posted on Dec 01, 2008
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