2008 Colorado I4 - P0017 - exhaust camshaft position implausible

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Thread: 2008 Colorado I4 - P0017 - exhaust camshaft position implausible

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    Walking
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    Question 2008 Colorado I4 - P0017 - exhaust camshaft position implausible

    Hi. I'm hoping someone can shed some light on this condition that has plagued my truck for the past 2 years.
    During a cold start in cold weather (typically below zero Fahrenheit), when I start my truck, the DIL (check engine) illuminates. My scanner always reports the same condition:
    P0017 - crankshaft position sensor - exhaust camshaft position implausible.

    The truck starts and runs perfectly. No stumbles, no noises.

    I clear the error and will return during the next cold weather cold start, the DIL is on again.

    I'd like to know the following:
    1) Is it due to a "bad" sensor on the exhaust camshaft?
    2) Where is the exhaust camshaft sensor?
    3) Should I be concerned about the timing chain (belt) failing?

    This started before the truck and 100,000 miles. It now has 139,000.

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  3. #2
    Walking
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    Re: 2008 Colorado I4 - P0017 - exhaust camshaft position implausible

    Ultimate lurker here (had an account years ago and lost both the password and email address associated - never reregistered)

    Anyway, this is fairly well documented over at 355nation. You'll find better information than I can provide there.

    In summary, could be the cam sensor, or even the actuator solenoid, with a (small) possibility of it being the crank sensor. If either of the sensors are replaced it'll most likely require a CASE relearn (professional scantool required, GM Tech II or HPtuners/others).

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    P0017 code may set for any of the following reasons:

    The engine is timed incorrectly. See current version of TSB 06-06-01-017 (RPO’s L52, LK5), See current version of 07-06-01-019 (RPO’s LLR, LLV) See current version of 07-06-01-018 (RPO LL8) Use these documents to check timing. The technician should follow the procedures to set the engine to #1 TDC then place the straight edge on the cam flats and:
    1.1. If one cam flat has excessive clearance as noted in the TSB that cam is one tooth off.

    1.2. If both are cams flats have excessive clearance as noted in the TSB in the same direction the timing is off at the crank gear.

    2. The crank timing gear has a loose fit to the crank. See current version of PIP4581, The concern could be:
    2.1. The crank key or keyway has excessive clearance

    2.2. The crank bolt is loose.

    The Crank end play is excessive. See current version of PIP3694
    The cam actuator solenoid is restricted or screens are missing. See current version of PIP3694
    The cam actuator is sticking. See current version of PIP4913
    Low oil pressure or oil contamination. See current version of PIP4913

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