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Glow Plugs

Discussion in 'VW Mk4 Jetta, Golf, New Beetle, Passat TDI forum' started by foxden, Apr 11, 2012.

  1. foxden

    foxden New Member

    Dec 23, 2010
    2001/2003 Jetta TDI
    My 2003 Jetta Wagon with 107,000 miles has a code P0671 #1 glow plug. Doing some reading on here I find it could be the plug or the harness. I'm going to OHM the plugs and also check the harness. If the plug is bad, what should I be careful of when replacing. I plan on replacing all the plugs.
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  2. stubb's

    stubb's New Member

    Apr 11, 2012
    mk4 golf tdi
    Yes, replace all the plugs. Just be careful they can strip out easily. If the code still comes up replace the harness. That was my problem. I made my own harness to save some money. Worked great. It's been over a year with no more code. :D

  3. shuswap

    shuswap Member

    Dec 12, 2010
    2005 Golf TDI auto
    Also, if you switch the plugs to a different hole then you can determine if it's the plug or the harness. IE....did the code change to a different cylinder.

    Be very careful with the plug extraction....they are alum, as is the head. I worked mine back and forth to free them up.

    Put a little non-seize on the threads before installing the new plugs and remember that they are torqued to a VERY low value....sorry I don't have the number handy, but a search should provide an answer for you.

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