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  1. P0094 and P0091

    Alfa 159, Brera & 946 Spider
    Help. The 159 has broken down twice, now and both times the fault code is the same. P0091 and P0094 Fuel Pressure (high pressure pump input regulator).:irked: First, what is the pump input regulator and secondly, is this a sensor fault or a regulator fault?? Are there any other causes of the...
  2. GT Jtdm P0091 , P0094

    Alfa 147, 156 & GT
    Evening All , Not having fun today . GT had not been used for a few days (5 or 6) , when starting today it wound over more than usual and started eventually which I noticed and it puzzled me a bit . Then I went out , pulled away from a junction and put my foot down MSCF immediately came on and...