2011 Chevy Traverse LS Error Code P2176 - Chevy Traverse Forum: Chevrolet Traverse Forum
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post #1 of 18 (permalink) Old 02-06-2019, 02:40 PM Thread Starter
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2011 Chevy Traverse LS Error Code P2176

So about a week ago, I was filling up my tank and when I started the engine, I got the check engine light. I took it right over to Autozone and they scanned it and found the P2176. They looked it up and gave me a printout. At the time, it said one of the most common cause for my vehicle and this code was a bad battery. My Traverse has 166k miles now and we were still on the first battery. I have had this vehicle in a couple of shops where the battery was tested (this Autozone late last year) and at a Tires Plus (to do an alignment). Both tested at the points under the hood, but then I had our AAA battery guy come out to check the actual battery behind the passenger seat. Each time they said the battery tested just fine and they said that the test points under the hood donít always give a clear result. So I didnít change the battery then. This time I called AAA again and bit the bullet and swapped out the battery. Since the battery cable was disconnected for about 5 minutes, this cleared the check engine light.

I was able to drive the car for about a week (quite a few miles actually) with no errors or check engine light. Then yesterday my wife was driving and got something like ECM fuse bad. The vehicle went into Limp mode and she was able to drive it to work (about 3 miles away). She later left work and it started without any problems and went into normal gear. She went back to Autozone and they ran the codes again. Got P2176 again and it said Throttle Actuator Control System Idle Position Not Learned.

I watched youtube last night and found something on excess oil in the big ďhoseĒ between air filter and intake. It said the oil comes from the PCV valve and breather valve and can cause the P2176. The fix is pretty cheap and easy, so Iím going to try this and clean out the hoses with throttle body and air intake spray (and let it dry) and replace the PCV and breather valves (since mine are original from 2011).

Anyone have this error code and were able to get rid of it this way?
neustkg is offline  
post #2 of 18 (permalink) Old 02-06-2019, 09:52 PM
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Got the light on my 2011, cleaned the throttle body, not much oil in the hose, light went out. Don't know the code.

BUT: Irrespective of the oil issue, if your 2011 was built in fall 2010, your battery is almost 8-1/2 years old. You're on borrowed time on the battery. Pat yourself on the back for getting such a long life out of it and then replace it.

2011 2LT FWD replaced by 2017 2LT AWD
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post #3 of 18 (permalink) Old 02-07-2019, 05:29 PM Thread Starter
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Quote:
Originally Posted by greentraverse View Post
Got the light on my 2011, cleaned the throttle body, not much oil in the hose, light went out. Don't know the code.

BUT: Irrespective of the oil issue, if your 2011 was built in fall 2010, your battery is almost 8-1/2 years old. You're on borrowed time on the battery. Pat yourself on the back for getting such a long life out of it and then replace it.
I just ordered the PCV valve and breather and some throttle body spray and will replace/clean these as well as replace the air filter.

On the battery, I did buy a new battery from AAA last week (we can buy batteries with installation here in Colorado from AAA). I decided that being in the cold winter months with temps in the 20s or lower overnight until about late April, it would be most prudent to replace it. We just had our first brake job done last year at about 160,000 miles as well (on our 2008 impala we are at 120,000 miles on the first brake job, too).
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post #4 of 18 (permalink) Old 02-07-2019, 07:10 PM
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If you're already in there to clean the TB, I would suggest cleaning the MAF also. And don't forget to disconnect the negative battery cable while you're cleaning the TB
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post #5 of 18 (permalink) Old 02-08-2019, 11:50 AM
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You dont have to disconnect the battery.
Just make sure you do not have the keys in the ignition.
As far as the TB is not energized.... you can move the plate back and forth to clean/spray.

2010 FWD LT1-Gold Mist Metallic- seats 8.
Build Date- July 31, 2009-2nd day of Spring Hill 2010 production.

2013 Equinox 3.6L - 83,000
2010 Traverse 3.6L- 148,000
2003 Trailblazer 4.2L- 181,500
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post #6 of 18 (permalink) Old 02-08-2019, 12:19 PM
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I didn't mean due to energy, I always disconnect it to let the computer relearn the new, cleaner throttle body. But maybe I'm wrong, in which case I stand corrected.
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post #7 of 18 (permalink) Old 02-08-2019, 01:40 PM
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Quote:
Originally Posted by David B. View Post
I didn't mean due to energy, I always disconnect it to let the computer relearn the new, cleaner throttle body. But maybe I'm wrong, in which case I stand corrected.



ahhh got it.
Yeah this was very popular on the trailblazers. if your TB was dirty- and it learned stuff to make up for the dirtiness, and you disconnected the battery- it lost all the learned settings.
and operated like crap when used again.
it didnt operate nicely with factory specs and a dirty TB,
the fix was to disconnect, clean, and then reconnect. clean TB- worked well with factory specs.


Though I have not see it come up as it did on the trailblazer forums..... I understand your train of thought and is correct. Especially if youve disconnected before without cleaning.

2010 FWD LT1-Gold Mist Metallic- seats 8.
Build Date- July 31, 2009-2nd day of Spring Hill 2010 production.

2013 Equinox 3.6L - 83,000
2010 Traverse 3.6L- 148,000
2003 Trailblazer 4.2L- 181,500
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post #8 of 18 (permalink) Old 02-11-2019, 10:59 AM Thread Starter
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CuriousÖI have a 2008 Chevy Impala with about 120k miles. Wondering if this (just the clean out of the hoses/throttle body) should be done on this car as well?
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post #9 of 18 (permalink) Old 02-11-2019, 02:05 PM
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dont know what engine is in there etc...
But Id look and clean.

2010 FWD LT1-Gold Mist Metallic- seats 8.
Build Date- July 31, 2009-2nd day of Spring Hill 2010 production.

2013 Equinox 3.6L - 83,000
2010 Traverse 3.6L- 148,000
2003 Trailblazer 4.2L- 181,500
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post #10 of 18 (permalink) Old 02-11-2019, 03:42 PM Thread Starter
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Quote:
Originally Posted by rbarrios View Post
dont know what engine is in there etc...
But Id look and clean.
Itís a 3.9L V6, and I think the air filter orientation is similar to the 3.6L, so I will look it over next time (soon) I do the oil/filter and air filter change.
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