Car shaking only while accelerating, codes, P145C and P0497

Tiny
JVT
  • MEMBER
  • 2011 HONDA CRV
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 104,000 MILES
Hi,

My car just recently began shaking when accelerating. It appears to be mostly in a limited speed range, usually 40-45 mph, and is most pronounced when driving up even slight hills.

The shaking does not remind me of an unbalanced wheel, which wouldn't apply here anyway because it occurs only when accelerating, not when coasting or maintaining speed.

The shaking doesn't seem to occur below or above that speed range, at least not noticeably. The shaking stops when the car shifts and the RPM's drop. Driving at that speed range, unless uphill, does not cause the shake as near as I can tell.

This started happening suddenly this week. A few weeks ago I had new spark plugs installed at recommended mileage. I do have a check engine light for two codes, P145C and P0497, which are emission related and seem to be due to a fault EVAP purge solenoid. This I've been living with for months under the impression it wouldn't affect anything, but now I'm wondering. There are no misfires or other codes are registering on the code reader (and a mechanic has used an expensive tool to verify my iPhone-based reader).

Reading online I've seen possible causes mentioned of bad CV joints, loose vacuum hose, throttle position sensor, bad motor or transmission mounts, torque converter, transmission, and on and on.

Don't know cars, but can't logic and some simple tests rule some of these out? For example, does the lack of codes strongly imply it isn't a misfire, transmission, or torque converter problem or don't those always show up as codes? Would a bad CV joint show symptoms always or only at certain times like that? The car accelerates fine through other speed ranges without symptoms, it just shows up at that 40-45 (maybe 50) zone.

Any help is appreciated!

John
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Saturday, August 31st, 2019 AT 10:05 PM

9 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,544 POSTS
Hello,

What happens is the CV axles wear out causing the vibration under load. here is a guide to help you change them out step by step with instructions in the diagrams below to show you how on your car:

https://www.2carpros.com/articles/replace-cv-axle

Start a new question for the EVAP codes

Check out the diagrams (below). Please let us know if you need anything else to get the problem fixed.
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Monday, September 2nd, 2019 AT 5:27 PM
Tiny
JVT
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Hi Ken,
Thank you so much for your replay and the very thorough and informative installation instructions. Wow! I wish I was the least bit handy, I could save myself some money. I do appreciate seeing what's involved though.

Is this repair something any mechanic should be able to handle?

Do both axles need replacing? If not, how can I know which one is bad? Trying to keep costs down if possible.

Is it possible it's just a leaky/failed boot and not the entire axle needing replacement?

Also, I've read that some people have had problems with off-brand CV axles on Honda's and that subsequent OEM replacements fixed the problem. Any light you can shed on that? Do you recommend OEM? I'm sure they're more expensive.

One final question, now that you've identified the axle as the problem, I recall getting distracted in traffic and bumping a curb lightly with my right front wheel while making a right-hand turn. I was already slowed quite a bit but remember thinking "I hope it's okay." Nothing seemed out of place or wrong afterward, so I forgot about it. That was a couple months ago. Could that have caused the problem and it took awhile to manifest in the ride?

Many thanks once again!
John
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Monday, September 2nd, 2019 AT 11:10 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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Yes, a mechanic will be able to handle it should cost about $180.00 labor. I would do both axles and use OEM axle rebuilds. You are looking for new CV joints when doing the rebuilt axles, cost should be about $75.00 an axle. Let me know.
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Tuesday, September 3rd, 2019 AT 9:35 AM
Tiny
MRSMITH389
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  • 1 POST
JVT did you ever find a solution? I have the exact problem and was wondering what was the outcome for you.
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Thursday, April 20th, 2023 AT 3:00 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,544 POSTS
This was a few years ago, can you please shoot a quick video with your phone so I can hear the noise? That way I can tell for sure what's going on. You can upload it here with your response.
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Friday, April 21st, 2023 AT 12:58 PM
Tiny
JVT
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  • 5 POSTS
MrSmith and Ken,

Ken's advice was 100% spot on. It was the CV axle on one side. I had both replaced and no more problems. I had a little difficulty finding a mechanic that would believe it was the CV, but finally was referred to a shop that knew exactly what Ken was describing and was confident in fixing it. They showed me the wear inside the part. Sorry, it's been a while and I'm rusty on details, but I was amazed how few people understood this problem. Good luck with your car and belated thanks to you Ken. Really saved my bacon.
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Friday, April 21st, 2023 AT 10:01 PM
Tiny
JVT
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I just checked my records. I replaced both front axles. Both of the inner CV joints had divots.
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Friday, April 21st, 2023 AT 10:09 PM
Tiny
JVT
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Here's one of the inner CV joints showing the wear. Hard to believe that tiny mark caused all that vibration. Hope this helps!
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Friday, April 21st, 2023 AT 10:21 PM
Tiny
KEN L
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  • 42,544 POSTS
Good to hear, yep that is the kind of wear that will cause the vibration, thanks for the image to show anyone else having this problem. Use 2CarPros anytime, we are here to help. Please tell a friend.
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Saturday, April 22nd, 2023 AT 11:59 AM

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