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lower intake gasket

  1. rfingon

    heater control valve leaking, P0171 code

    OK, strap in, because this may be a long one.... This 4.0L OHV (166K miles) will throw a P0171 code during a regular, in town drive, but will never throw this code during highway driving. Also worth mentioning, the MPG is steadily going down the crapper. She used to throw both a P0171 and P0174...
    • rfingon
    • Thread
    • 4.0l ohv coolant leak heater control valve lower intake gasket p0171
    • Replies: 1
    • Forum: 4.0 Liter Forum

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