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Cam and Crankshaft Sensors

Discussion in 'Tech Info' started by Lj8215, Jan 13, 2017.

  1. Lj8215

    Lj8215 New Member

    Likes Received:
    Jan 13, 2017
    Keller, TX
    2012 Ford Expedition

    Car was idling rough and was throwing a cam sensor code. Replaced both cam sensors and still idling and running rough. Scanned again and the same code came up. Decided to go ahead and replace the crankshaft sensor too. So all 3 sensors were replaced and the car is still running rough. It is throwing a P0017 code which relates to the camshaft/crankshaft sensor. Any idea what else it could be? It isn't really losing much power when getting up to speed, just running a little rough. I can't figure out why it is still throwing the code after replacing all of the sensors??
  2. LEOL

    LEOL Full Access Members

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    Dec 29, 2016
    Albuqurque, NM
    You didnt provide what the codes were to begin with,... was it always P0017? or was it different to start with and now currently throwing a 0017?

    Position sensors can certainly go bad for no reason, but position sensors directly monitor and/or control an engine's timing, and can often indicate a mechanical timing problem that will likely only worsen to the point of serious failure if left unresolved... especially in engines like the 5.4 with its various common timing issues. As such, position sensor codes are not something i would take lightly.

    just based on the P0017, some basic causes could include any of the following

    Timing chain stretched, or timing belt skipped a tooth due to wear Misalignment of timing belt/chain
    Tone ring on crankshaft slipped/broken
    Tone ring on camshaft slipped/broken
    Bad crank sensor
    Bad cam sensor
    Damaged wiring to crank/cam sensor
    Timing belt/chain tensioner damaged
    Improperly torqued crankshaft balancer
    Mis-built or mis-timed engine
    Loose or missing crankshaft balancer bolt
    CMP actuator solenoid stuck open
    CMP actuator stuck in a position other than 0 degrees

    BUT.... given it sounds like this was in conjunction with other codes.... there are several issues that could be at work here....
  3. GalaxyPilot

    GalaxyPilot Full Access Members

    Likes Received:
    Jun 8, 2014
    leol is spot on, you might have an actual issue with the timing which could be caused by any of those components

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