what is this noise?

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JS22STL

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Dec 18, 2017
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Location
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I have a 2016 LC all stock except tires. Two days ago I went out to the garage around 6:00 a.m. after the car had been sitting all night. It was making this odd electrical noise. Can someone identify and should I bring to dealer?

 
If it's back by the spare tire, it's a small pump on the charcoal canister. Normal. It will run occasionally even when the truck is not running. I have gone out to the garage more than once and found mine making that noise.
 
Last edited:
Mine does it too. Part of the emission system self-checks with a small pumps looking for leaks. As above....normal.
 
Oh, the good ol' days when you could just vent to atmosphere...
 
Apparently if you run top of the world in moab you do vent to atmo.
Several trucks have come back from that trail with CEL, emission codes.
The diagnostic codes, and associated lights pop up every three days, after the truck runs the self test.
 
Thanks everyone
 

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