2015 Honda Civic Transmission Plug Fix (It Just Blew OUT!!!!!!)

In this video I share with you a problem That I ran across while checking my wife's battery on her 2015 Honda civic. I was just scanning around in the engine bay and noticed a shiny aluminum staring back at me, so I went in to investigate. I found this rubber plug setting to the side of this gaping hole in the top of the cvt transmission. I figured pressure was the problem, so I looked around for the vent and found i all stopped up. Next step was to clean and inspect everything then re assemble and fire it back up. This was a fun little project and I hope it helps you tackle your problems easily. Ill link the parts that I used in this video incase you want to repair you 2015 civic.
Some links below are affiliate links that I make a small percentage off of qualified purchases at no additional cost to you. Make sure to like ,subscribe and share it really helps the channel.
Product Links Below:
My PO Box is PO BOX 782 Troutman NC 28166
My T-shirts are available at www.acdesignsgarage.com
Transmission Breather: Link Below
www.ebay.com/i...
This is an Ebay link for the breather. I'm not affiliated with the seller or Familiar with them, but its the one I'm going to purchase.
Transmission Plug ( Behind the battery) amzn.to/3uvOkxp
Isopropyl alcohol amzn.to/42Ewc0M
spray bottle amzn.to/3wkqzZF
Oring pics amzn.to/4bA9tqT
Magnetic light amzn.to/42FwAfy

[@JamesSmith-hx3lp]

Thanks for the video, after working in industry for 40 years I’ve found that big problems can be avoided by fixing the little things first. Thanks

[@ACDesignsGarage]

You are absolutely right. Thanks for watching!!!!!!!

[@igotjokescuzz]

Thank you. I was just reinstalling my battery and found this plug laying next to the whole as well. I was like wtf .. very helpful

[@ACDesignsGarage]

Thank you, so glad I could help!!!

[@SpankysHotRodsandCustoms]

Great tips, that’s going to help lots of Honda enthusiasts out.

[@ACDesignsGarage]

Thanks Spanky, man this is a poor design, I think.

[@nancymarg8513]

Thank you! My son’s plug popped out twice in the last week and a half, drained all the tranny fluid. Original Google searches said it was the fill cap filled with debris, but that was clean. I found your video, and that seems to have been the problem. BTW: my son‘s 2015 has 210 K on it. And other than this, we’ve had no issues (knock wood).

[@ACDesignsGarage]

Glad it helped. Thanks for watching!

[@brendapayne3018]

Thank you so much for that tutorial. I was trying to find out where it was because it kept popping out. I will go home and do that just how you did it!

[@ACDesignsGarage]

Awesome, if you need a new one I put a link under the video in the description.

[@dianac2783]

Your video was great timing we just noticed the plug was off today when changing out the battery. Used your link to order a new one✌️

[@ACDesignsGarage]

Awesome, thank you, so glad I could help!!!!

[@Uhhlehssa]

Thank you so much for your help! I have the same year, make and model of your wife’s car and that was the same issue I found when my battery had to be replaced over the weekend. So glad it was an easy fix. Honda was telling me they would clean it for $100.

[@ACDesignsGarage]

Wow great job, thanks for watching!!!

[@jodywaller469]

Just discovered my 15 civic has the same condition. Super helpful video. Thanks bud!

[@ACDesignsGarage]

Thanks for watching, I think its a design flaw myself!!!!

[@smittysmitty4681]

Thank you for the video/ info This is the exact problem. My daughters car is having never knew about the pressure valve and didn’t you know it is clogged up and done as you had suggested as well and spun it towards the back. Thank you so much problem solved. 👍

[@ACDesignsGarage]

Awesome I hope it helped you!!!!

[@scottjune3554]

Thank you for sharing this. I am going to check mine right now and service it.

[@ACDesignsGarage]

Awesome, I'm interested in seeing if yours is stopped up . Let me know what you find. Thanks for watching!!!

[@Rikets97]

Ran into that on a newer Honda HRV. There is a TSB for that vent getting plugged and blowing out the plug.

[@ACDesignsGarage]

Thanks for sharing, I wasn't aware of this or I'd been on the look out. I'm glad I found the plug but gonna order a new one for sure. Thanks for watching!!!

[@dalestemen3805]

Thank you for pointing out where the vent plug is.

[@ACDesignsGarage]

Thanks for watching

[@MikeOnTheInterwebs]

This happened to me - was discovered by a mechanic. The mechanic tried to sell me a new cabin air filter and engine intake filter (both of which I just replaced myself), but said nothing of why the plug came out or how to clean that little plug you showed that was clogged. He simply plugged it back in, and promptly removed the other items from my estimate while giving me a discount on the services I went there for in the first place. Currently on the hunt for why my car makes subtle gargling noises while accelerating around 35-40 mph. Hoping this is part of the solution.

[@ACDesignsGarage]

It could be, under that plug is all the transmission stuff rotating while it's running.

[@DIYGuyUSA]

I have this exact same problem. Thanks for showing the solution.

[@ACDesignsGarage]

Thanks for watching!!!

[@j.elliottgray2801]

For those without patience: 1) clean the plug w degreaser or alcohol. Put a little oil and plug back in. 2) reach down and find the L shape rubber vent, clean it. The plugged vent caused over pressurized transmission. Clean when swapping fluids. Optional: put some kind of ziptie or rubber band on the pressure relief plug.

[@fad_353]

Too lazy to buy a new cap, i follow all the steps and before placing the cap back on i just placed a few tight loops using a simple rubber band. (It acts like a tight seal/washer) around the top. Give it a firmed twist/ pressing down the inlet. So far it doesnt pops back.😅 cheers

[@ACDesignsGarage]

Awesome idea!!!!

[@fad_353]

Before fixing thia problem i feel the engine seems to jerk a lil in low speed. After trying this method it seems to dissapear and engine responds improved! Now Honda then this is really a global issues dire for design improvememt.

[@nickv4073]

Dont be lazy. The part is $4 on EBay. You dont want a rubber band breaking and falling into your tranny. That would be fatal.

[@edthesped186]

Hi thank you for the video, whats the name pf the second piece that you cleaned the one besides the plug

[@ACDesignsGarage]

I think it was like a breather I'm guessing is what it is.

[@dtdlookout]

Loved the video brother , well done!

[@ACDesignsGarage]

Thank you very much!!!!

[@Civic2303]

Thank you so much I was wondering why mine kept popping out

[@ACDesignsGarage]

Hope it fixes it for ya!!!!

[@stephenjackson4392]

Whooo wayyy thar Tex. Looky rat chair. Wayyy down tharrrr

[@douhavemilk]

One thing to also pay attention to is the transmission oil pressure switch. It's apparently common in our 9th Gen Civics for it to come loose over time. I wonder if it has to do with this issue in this video of built up pressure. My Brother's 2015 Civic was leaking transmission fluid out of the blue to the point where it had less than 3 quarts total of fluid in it. Barely moved. Had to put the car in neutral and push it to the driveway. Found out that the switch was EXTREMELY loose and dropped a ton of oil. Be sure to check the tightness of that switch! Learn from my mistake. (The switch can be accessed by removing the driver side tire, wheel well cover and its to the left of the transmission.)

[@ACDesignsGarage]

Thank you, ill check that for sure!!

[@douhavemilk]

@@ACDesignsGarage For sure, you're totally welcome. If it is loose, the torque spec is 15ft-lbs. (Called the Honda dealer to confirm this.)

[@BenjaminKwakye]

I have the same issue and have clogged up sand and mud in there. My car isn't pulling well. How do I clean the inside of the transmission and replace the oil with the plug?

[@ACDesignsGarage]

I changed the trans fluid on this one but didn't film it because I was in a hurry. I searched how to replace transmission fluid on a 2015 civic and several good videos came up. If you can't find them let me know!!

[@cesaryanes1287]

What is the little breather part called I’ve been going crazy searching at AutoZone s and shops but no one can seem to tell me what it is because mine broke off trying to take it off

[@ACDesignsGarage]

I put a link for the breather in the description box below the video. The only place I could find it was on ebay hope this helps!

[@dustiestspade339]

Thank you I found out mine just blew out and leaked

[@ACDesignsGarage]

Im not sure why yhey made it that way!!!

[@danielbarker7496]

If this plug pops off will the transmission fluid leak out a lot long term?

[@ACDesignsGarage]

I didn't notice alot but what I worried about was debris falling in the transformation.

[@Zetta_Stoned]

Just found my car like this after changing the fluids for this reason.. do I need another fluid change?! 🙃 Damn

[@ACDesignsGarage]

As long as it didn't get water or debris in it you should be fine, or to be safe drain it in a clean bucket and check it and put it back in!!!

[@Watchman999]

My plug was popped out too but the breather was NOT clogged.

[@ACDesignsGarage]

Not sure what causes it

[@nickv4073]

The plug may be worn out. A new plug will be a little thicker and stay in place more securely.

[@Watchman999]

@@nickv4073 yeah good call. It is 5 years old but honestly what happened to a traditional threaded bolt. What a joke.

[@extremeinternets]

Same here. It's happened twice, and the breather wasn't clogged either time.

[@atil-o4q]

what a design flaw. wish i knew about this years ago

[@ACDesignsGarage]

I agree what we're they thinkin?

[@bongodrummer6914]

SOME SAY YOU FILL THE TRANS FLUID AFTER OPENING THYS RUBBER PLUG.....NOPE WHAT IS THIS FOR ?

[@ACDesignsGarage]

Not sure, I guess its a breather, I need to do some research on it!!!

[@bongodrummer6914]

@@ACDesignsGarage Thanks

[@pablogutierrez1009]

what is that "blue thing"?

[@k3ygrross]

Fuel filter

[@nickv4073]

The part is called a transmission breather cap.

[@ACDesignsGarage]

Thanks!!!

[@marcigrabarits6714]

CAT PEE. If you smell cat pee (what the CVT fluid smells like to me) check the plug. Luckily every time mine pops out it lands in the same spot - almost like they planned it that way. After reading extensively about the problem I have yet to see where Honda is taking accountability for the design flaw. Anyway . . . . .the plug blew out but when? There is no dipstick to check how much fluid I lost. So to be safe I add a little bit. So this pressure sensor/valve is a good thing - almost like they planned it that way. But I live in a remote area with lots of hills, dirt roads and soon the snow and salt. I am wondering what may get into my gearbox - and did anyone plan for this to happen? 😜

[@ACDesignsGarage]

I agree, everytime mine pops out it lands in the same spot also!!

[@javiersalazar4595]

Eso es un error de diseño enorme, yo tengo una hrv 2019 y bastó una fuerte lluvia para que entrara agua oor ese orificio directo a la transmisión. Y en la agencia fingieron demencia y quisieron culparme diciendo que yo lo habia hecho intencionalmente.

[@ACDesignsGarage]

I agree bad design!!!!!

[@j.elliottgray2801]

Ummm, all these fancy computers and the car can't tell me the transmission is open??? Flushing oil... no idea how long it's been like that.

[@ACDesignsGarage]

I agree!!!!

[@cowbelltv4865]

I had to replace my 2015 civic transmission 2 years ago when the plug popped and i drove it with reduced fluid. Ugh.

[@ACDesignsGarage]

Thanks for the tip I need to change my fluid for sure now!!!

[@KamranKhanmba]

2015 Honda Civic LX , i did all that but still poping out after one week why?

[@ACDesignsGarage]

Maybe its clogged up again, not sure if thats possible that quick. It makes me think its a breather issue some where if the transmission is pressurized. I will say maybe you need a new plug, that what im doing because mine is pretty loose.

[@KamranKhanmba]

@@ACDesignsGarage thanks for replying. I just check and vent is not clogged. Not sure if plug has gone bad .

[@vincepiercey8807]

I have a 2015 Honda Civic transmission makes a ticking noise and has been diagnosed as a transmission problem. But I've been driving like that for about a month. And I have the same problem transmission plug pops out.

[@CesarGarcia-lh2cq]

Mine did the same. Put a new plug that fit more snug. Seems like that fixed it popping out. Someone recommended to buy usa aftermarket one. I put a honda oem

[@LAMBO_AKUMA]

Has anyone had a 2015 civic that makes a wierd rc car kind of whining when your accelerating from 0 to about 20 mph has almost no power in that range as well .