[markurl]

Hello Everyone!

I have owned my 2012 CT200H for 4 years and have personally drive the past ~90k miles on it. I am at 133k and experiencing the violent shutter that appears to be common among 3rd gen Prius and our Ct200h. This occurred twice in 2018 and the dealer conducted a one time good faith repair under TSB L-SB-0004-13, replacing the Intake Manifold. All was good since they conducted this repair. Fast forward to now, I am having this issue at 60-100 degree days almost every time I start the car. Weirdly enough, it won't shudder if I leave the car running and the engine shuts off when the hybrid system takes over. However, if I turn the car off for 1-2 minutes, it will shutter upon starting back up. In the past couple days, I have started to get misfire codes on Cylinders 2 & 4. Once I rev the engine a bit, everything smooths out. I do not believe I have any contaminated oil or am losing coolant.

So far I have cleaned the Throttle body & EGR pipe.

Can anyone solve this mystery for me?

 

[stormchaser]

Happened to me once 2 years ago (in the UK ) in my 2011. The weather was extremely cold then.
The only thing I have done since this problem is once a month I add an injector cleaner every time I fuel up. I haven’t cleaned anything with the EGR setup. I’m now on 99K and it’s never done it since.


Sent from my iPhone using Tapatalk

 

[burstaneurysm]

It's a known issue. When moisture builds up on the manifold, it causes a pretty significant knock at startup.
There's nothing anyone can do (or at least they haven't figured it out) but it doesn't cause any harm.

It's happened to me a handful of times, only when it's very cold out and typically after a short trip.

 

[jwesenbe]

I live in Arizona, have never had the problem.

 

[o_tomodo]

I could reproduce it(less violent) last year twice. After a snowfall i had to move the car,to remove the snow and put it back where it was before. The next day i started the car manually and heard the knocking for a few seconds.
I did a few fill ups with premium gas to see if it would eliminate it, but the last snowfall brought a bad luck with it and the car spent 43 days at the body shop.
Next winter i ll start all over again

Envoyé de mon LG-H831 en utilisant Tapatalk

 

[markurl]

Thanks for the input everyone. I am going to clean the EGR cooler, intake manifold and replace the PCV valve. I am not holding my breath that this will do anything but it's probably a good idea as preventative maintenance anyway.

 

[leonar40]

Both my Prius and CT200h have had this issue, only on rare instances. Mostly when it was cold and when I let the car sit for a long time. The worst was when I had the car at the airport for 10 days in the winter. When i started it, the shudder lasted many seconds and I had to feather the throttle a few times to finally make it stop. Just passed 100K though and no issues.

 

[Mevadus]

Same thing happened to my car, if you haven’t seen my post. I had the head gasket replaced, and a few weeks later threw a rod. I’d say prepare for an engine swap or time to sell.

Check your coolant expansion tank, I bet it’s low or empty.

 

[cdog]

Oh. your post makes ME shudder. I had the same thing happen to me. It happened only a couple times, then after a year, happened again. Engine light came on. Was a head gasket, and found out one of the heads had to be remachined. This was on my 2013 and at about 115k. OMG the labor costs. I think it was like 4k and my kbb is only 7-8k. Ouch. It's only a Base model. good luck!

 

[KKM]

This issue has been well dissected at ClubLexus forum, there's a sticky with DIY videos and discussion here:

https://www.clublexus.com/forums/ct-200h-model-2011-present/917145-rough-engine-start-misfires-low-coolant-check-here-for-egr-and-head-gasket-info.html

Bottom line is keep the EGR cooler, EGR pipe, and manifold clean. I would say start at 60K, then every 60K after that to keep it running efficiently. I did mines at 70K, the bonus is that my mpg went up about 10%.

 

[erockz]

Same thing happened to my car, if you haven’t seen my post. I had the head gasket replaced, and a few weeks later threw a rod. I’d say prepare for an engine swap or time to sell. Check your coolant expansion tank, I bet it’s low or empty.

thats horrible these cars can only go 100,000 miles and then they die, such a nice looking car....

 

[MichaelG65]

If one can Duplicate the Bang Bang, we can figure out the solution..

We Did duplicate the Bang Bang..
Plugs-Coils-Injectors
-Fouled plugs
-Bad coil(s)
-dirty plugged up injectors

I've been posting in this thread..
Bad head gasket or bad head due to violent shudder https://www.ct200hforum.com/forum/showthread.php?t=145673

 

[MichaelG65]

...

Done..
It is SPARK PLUG / COIL that causes the JackHammer

Cracked my engine cover taking it off to test this..

Addendum is correct..
Ordering spark plugs today for next oil change

Here's a video Duplicating the JackHammer
https://youtu.be/BAKaWArWpTo