I4 CVT - Annoying vibration when idling - Drive Accord Honda Forums
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post #1 of 21 Old 05-17-2017, 12:06 PM Thread Starter
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I4 CVT - Annoying vibration when idling

Less than two weeks ago I bought my first Honda: 2017 Accord Sedan Sport CVT with Honda Sensing. I've been enjoying it so far, but there's a very annoying issue I didn't notice on a test drive. The car vibrates on idling and I can see the RPM needle fluctuating.

There are several YouTube videos showing similar abnormal behavior:

Have you ever experienced the same problem with your 9th generation Accord? If yes, how did you fix it?

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post #2 of 21 Old 05-17-2017, 12:15 PM
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post #3 of 21 Old 05-18-2017, 04:37 PM
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Originally Posted by stiganski View Post
Less than two weeks ago I bought my first Honda: 2017 Accord Sedan Sport CVT with Honda Sensing. I've been enjoying it so far, but there's a very annoying issue I didn't notice on a test drive. The car vibrates on idling and I can see the RPM needle fluctuating.

Have you ever experienced the same problem with your 9th generation Accord? If yes, how did you fix it?
Yes, on my '16 Coupe EX CVT+Sensing.

Seems to be a common issue with CVTs, just look around on these forums. I usually just shift into N at long lights or in stop/go traffic. Stops vibrating immediately...

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Nag, nag, nag...
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Last edited by namegoeshere; 05-18-2017 at 08:59 PM. Reason: le merge
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post #4 of 21 Old 05-19-2017, 03:49 AM
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Originally Posted by Ronch View Post
Yes, on my '16 Coupe EX CVT+Sensing.

Seems to be a common issue with CVTs, just look around on these forums. I usually just shift into N at long lights or in stop/go traffic. Stops vibrating immediately...
I do the same for my 2016 EX during long lights. Question, is there any long term wear or damage that could be done doing this? (shifting to N).

Last edited by namegoeshere; 05-19-2017 at 09:09 AM. Reason: fix quote fail
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post #5 of 21 Old 05-19-2017, 05:09 AM
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Should be fine so long as you're not shifting while driving. I'm used to driving my manual which has an automatic neutral when not in gear. On the occasions I drive the accord, I do the same. The vibration seems most pronounced when the engine is cold. Not as noticeable once at operating temp.

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post #6 of 21 Old 05-19-2017, 05:12 AM
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I noticed vibration as well when I first got mine. Went away on its own after a few hundred miles and several blasts down the highway. Now at 2500 miles on the clock, that initial vibration is gone. Consider it "new car break-in" and move on.
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post #7 of 21 Old 05-19-2017, 07:09 AM
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Could be from the ac compressor cycling. All hondas do this when at idle if the AC compressor cycles. The engine has to increase rpm slightly to account for the additional load but the compressor only cycles for a couple seconds so then the rpms drop back down.
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post #8 of 21 Old 05-19-2017, 09:07 AM
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My '16 Coupe has ~11K miles and the vibration hasn't gone away. In fact, I think it only started after they did that CVT software update last fall.

And the CVT vibrates at (long) stoplights whether the A/C is on or not. Doesn't matter if engine is cold or warm...
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post #9 of 21 Old 05-19-2017, 04:54 PM
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CVTs mated to 4 cylinder engines will cause noticeable vibration. This phenomenon affects Nissan, Toyota, Subaru, etc. I will say, the '17 Nissan Altima that I rented a couple of weeks ago, was rather smooth, and only had minor vibration at low speeds, or at an idle. It wasn't bothersome because I've driven CVT equipped cars in the past. My point is there isn't a "fix" for the vibration, as it's a harmless characteristic of the CVT and engine combination.

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post #10 of 21 Old 05-20-2017, 05:30 AM
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I have 2016 Accord LX sedan with 18,000 miles (CVT) that I bought new. I have never noticed this vibration, either before or after the software update. It may have something to do with the difference in the Sport configuration (Dual exhaust, different suspension and wheels)
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post #11 of 21 Old 05-20-2017, 12:06 PM
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I don't think it has anything to do with the CVT. 4 cylinder Accords have been vibrating at stops since at least 92, with everything from motor mounts to electric load detectors being blamed for it. Still haven't seen a definite solution for any of them.
My 16 has a little vibration when first started cold, when the idle speed is up, but no vibration after a couple minutes running (so far with 7000 miles).

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post #12 of 21 Old 05-20-2017, 12:42 PM
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Quote:
Originally Posted by BLCKFLSH View Post
I don't think it has anything to do with the CVT. 4 cylinder Accords have been vibrating at stops since at least 92, with everything from motor mounts to electric load detectors being blamed for it. Still haven't seen a definite solution for any of them.
My 16 has a little vibration when first started cold, when the idle speed is up, but no vibration after a couple minutes running (so far with 7000 miles).
I think you are correct. Some who don't have clue want to grasp at straws and blame the vibration on the CVT. I am no fan of the CVT, but it is very unlikely that the vibration that some drivers find objectionable is related to the CVT.

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post #13 of 21 Old 05-20-2017, 04:30 PM
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The vibration is due to the low idle I think. Giving it just a touch of throttle while idling makes the vibration go away. Set so low for emission reasons.

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post #14 of 21 Old 05-20-2017, 08:14 PM
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The vibration is due to manufacturer's bad move of one configuration for both MT and AT; hence vibration on AT at idle. Of course if you put both in Neutral, they are all just fine; but they forgot their own products that both MT and AT don't operate in the same fashion.
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post #15 of 21 Old 05-21-2017, 10:50 AM
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If you do a basic google search, and you will be bombarded with a plethora of information that suggests, and proves that the vibration is related to the CVT. Not sure why people still deny this reality. Honda's CVT is supposed to be one of better ones on the market, with the most reliable performance history, along with the best CVT characteristics.


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