Help with Air Pressure Sensor I.D. / Function

Discussion in 'SRT Hellcat Maintenance' started by TallCool1, Sep 27, 2015.

  1. TallCool1

    TallCool1 Gold Member Hellcat Car Club Gold Supporting Member Nat'l Hellcat Tech Advisor HCC Charter Member

    Joined:
    Jan 5, 2015
    Messages:
    2,394
    Likes Received:
    791
    Trophy Points:
    458
    Location:
    Pacific NW
    Vehicle:
    Challenger SRT Hellcat
    Which one is this and specifically what's its purose? (No guesses please.) fnkychkn ? Thank you.

    20150927111341.jpg
    20150927111412.jpg
     
  2. fnkychkn

    fnkychkn swollen member Gold Supporting Member

    Joined:
    Jan 24, 2015
    Messages:
    1,374
    Likes Received:
    487
    Trophy Points:
    368
    Location:
    plastic take-out container
    Vehicle:
    Charger SRT Hellcat
    that is the crankcase pressure sensor. it is meant to monitor PCV system plumbing integrity.

    from FSM:

    Theory of Operation
    When the engine is running and not in boost, the crankcase ventilation hose provides filtered clean air from the clean air tube to the PCV system through the crankcase. During boost the flow reverses and PCV vapors are pushed from the crankcase, through the tube, into the clean air tube, then into the Supercharger, and eventually into the Intake Manifold where they are burned. If the crankcase ventilation hose is disconnected from the clean air tube, PCV vapors will leak into the atmosphere whenever the engine is in boost.

    The PCM will run a diagnostic to determine if the crankcase ventilation hose is disconnected. This monitor only runs for a short time during engine cranking and initial start up. The Crankcase Pressure Sensor is connected to the crankcase ventilation hose fitting on the clean air tube. When the clean side of the PCV system is intact, the sensor will detect the pressure pulsations coming through the tube and the diagnostic monitor will pass. If any part of the clean air side is disconnected or restricted, the sensor will not see the pulsations and the diagnostic monitor will fail. If the sensor is stuck in range, and does not change when the diagnostic monitor is running, the diagnostic will fail.
     
  3. TallCool1

    TallCool1 Gold Member Hellcat Car Club Gold Supporting Member Nat'l Hellcat Tech Advisor HCC Charter Member

    Joined:
    Jan 5, 2015
    Messages:
    2,394
    Likes Received:
    791
    Trophy Points:
    458
    Location:
    Pacific NW
    Vehicle:
    Challenger SRT Hellcat
    Thanks again. Your beer credits are quite a large # here in Oregon my friend...
     
    • Funny Funny x 1

Share This Page