P0016 - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
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post #1 of 4 (permalink) Old 01-07-2018, 11:34 AM Thread Starter
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P0016

I changed the timing chain tensioner on my cobalt yesterday and today it's throwing a p0016 code, cam/crank position correlation dtc.

My question is;

The car is running absolutely perfect, and no longer has any dreaded rattle on startup. I cleared the code more than once and it keeps returning.

I've driven it about three hours since then and all throughout the rpm range, wound it out and everything.

From everything I've read I was anticipating it turning into a dog, or getting poor mileage, or at least exhibiting some symptom other than the code.

Thoughts?
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post #2 of 4 (permalink) Old 01-07-2018, 12:16 PM
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You could be off one tooth on the intake sprocket a it would still run pretty good but this would give you a correlation code. You may have to pull the valve cover and make sure it didn't skip a tooth on the intake Cam upon initial start-up.

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post #3 of 4 (permalink) Old 01-07-2018, 01:14 PM Thread Starter
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It's way too cold around here to remove the valve cover at the moment, although I'll definitely look into it when it warms up, and considering I had no dtc's before - I'm sure it skipped a tooth.

Other than the code, do you think I'll be alright driving it the way it is - if it's exhibiting no ill effects?

By the way, something else I noticed when looking over the different values in my OBD app thing a ma bob, the voltage on the alternator is outputting 15 - 15.5v. I'm not certain how that seemed to happen at the same time, but figured it was worth mentioning. Seems high!
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post #4 of 4 (permalink) Old 01-07-2018, 03:22 PM
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Best is to check with a multimeter at the battery. You may have a bad connection forcing the alternator to up the voltage so the battery actually charges. If you don't hear any noise coming from the engine you should be good to drive it as is. A mistake people often do is think they have released the tentionner properly and they haven't, this will often cause the chain to jump upon start-up.

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