Engine knock, codes p0011, p0014, and p0021?

2013 GMC ACADIA
200,000 MILES • 3.6L • 6 CYL • 4WD • AUTOMATIC
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GMCACADIAGUY
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My Acadia has been sitting for around 5 months. I just put a starter and alternator on it and now there’s a knock from the engine but no check engine light. I hooked a scanner to it. It’s giving p0011, p0014, and p0021 codes.
Jul 25, 2023 at 9:28 AM
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JACOBANDNICKOLAS
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Hi,

All three codes are related to the camshaft position solenoid actuators. This could be from sitting, but I feel that is unlikely.

Is the engine oil clean and full? Have you checked if any mice chewed on wiring on the engine?

If you look below, I attached the description and diagnostics for the codes. Take a look through them and let me know if you are comfortable performing them. Also, at this point, I don't think it is timing related as far as a timing chain because you have one of the four sensors not setting a code.

Let me know what you find or if you have other questions.

Take care,

joe

See pics below.
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Jul 25, 2023 at 9:54 PM
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GMCACADIAGUY
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My oil is reading full, but I changed the oil during the months the truck was sitting and not operable.
Jul 31, 2023 at 5:58 AM
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JACOBANDNICKOLAS
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Hi,

The timing of the oil change is fine. That wouldn't cause any issues. Are you comfortable performing the diagnostics I listed above?

Let me know.

Joe
Jul 31, 2023 at 8:56 PM