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    kwebb01's Avatar
    kwebb01 Posts: 1, Reputation: 1
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    #1

    Jun 21, 2010, 07:44 PM
    2003 honda civic ex code p1259 vtec system malfunction
    Recently my 2003 honda civic ex has been almost dying when I slow down or idle and just yesterday my check engine light came on with the code p1259 vtec system malfunction. What could this be and how much will it cost?
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #2

    Jun 21, 2010, 07:57 PM

    . Ensure the oil is the proper viscosity Honda recommends. I would only use full-synthetic engine oil in a VTEC.

    . Check/replace the VTEC Pressure Sensor. Check connection and wiring first.
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