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  • kiawah 03/06/08 11:33 am PST

    Go to this website and put in your vehicle, and the codes.

    Generally it means the vehicle is running too lean. That can ultimately burn valves. Could be due to an intake manifold leak, or potentially a sensor problem.

    Source:  [ Link Not Allowed ]

  • kiawah 03/06/08 11:58 am PST

    I should also indicate, that one way to check for an intake manifold leak is to spray some carb cleaner around the joint where the intake manifold attaches to the head (while the engine is running...take care of safety). If the engine speeds up and changes idle speed/sound, definitely have a leak.

  • nh_dealer 11/28/11 3:01 pm PST

    Copied directly from my source:

    Basically this means that an oxygen sensor in bank 2 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 2 is generally the side of the engine that doesn't have cylinder #1.

    Note: This DTC is very similar to P0171, and in fact your vehicle may show both codes at the same time.

    A code P0174 may mean that one or more of the following has happened:

    -The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters can cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.

    -There could be a vacuum leak downstream of the MAF sensor.

    Source: 

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