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2003 Jetta TDI code P0251.

Discussion in 'VW Mk4 Jetta, Golf, New Beetle, Passat TDI forum' started by DPrez1, Mar 19, 2012.

  1. DPrez1

    DPrez1 New Member

    Jun 7, 2011
    jetta tdi/2003
    I recently got a code P0251 which translates into a problem with the injector pump metering control, according to the technician who checked it, which he said is probably caused by the modulator piston displacement sensor. Would someone please explain this to me and tell me where this faulty sensor is located and the proceedure to replace it. Thankyou, Dean
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  2. Keithuk

    Keithuk Super Moderator

    Aug 29, 2010
    2010 Golf GTD (170) CBBB
    Stoke on Trent, England

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