Prius (2010-12) :: Engine Rattle At Low Rpm Acceleration
Jul 23, 2016
I'm having a trouble when accelerating at low rpm the engine begins to rattle. Tried removing the connector plug on the egr, to my surprise the rattle is gone but the engine light comes on saying that the EGR circuit is incomplete. Took it to the dealer and they diagnosed it to be the EGR valve opening but failing to close, so they instead proposed to fill in gas with a bottle of their injector cleaner. That made no difference, so tried replacing the EGR valve but again makes no difference. What could the culprit be?
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So lately I've been hearing what sounds like a slight lifter knock that develops at 1500 rpm to 2700 (I have ultragauge) when accelerating or maintain speed, and it only appears when the engine is at operating temp and disappears when rpm is below 1500 rpm and above 2500 rpm my oil is running at 3900 miles using Toyota synt 0W-20 and it looks pretty clean and at high mark of the dip stick.
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So I have searched about engine rattle/knock and I have found lots of results for cold starts but I haven't found it for the issue that I am having. I have a 2010 and anytime the battery is real low, around 2 bars and the ICE fires up to charge it, any time I give it a little throttle input, I get heavy valve rattling. It doesn't matter if its cold or hot, it does it as long as the battery is low. I never get this noise when battery is charged up, only when low. I have a link to the video below and you can see once I give it some input, it starts to sound like an old diesel tractor. Prius has close to 200K on the odometer and all my maintenance is up to date. Please turn the speakers up but the noise is right at 5 seconds in or so.
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I've been recently having the engine rattle/knock noise occasionally when I start the car. After my first oil change, I mentioned this to the dealer and demonstrated this to them while they documented the issue. I left my car at the dealership for investigation.
The following day, my dealer said they called Toyota and created a case about this. Toyota responded saying they heard about this and the possible root cause is the Motor Mounts on the Prius. They will be sending parts (date is still unknown) to fix the issue. :rockon:
I specifically asked if there is any damage to the engine and they said absolutely not and there is nothing wrong internally with the car. This also makes kinda sense because if I press the accelerator to the ground when it starts up, the knock doesn't appear. It also works if I put the car into D and drive away.
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I've been recently having the engine rattle/knock noise occasionally when I start the car. After my first oil change, I mentioned this to the dealer and demonstrated this to them while they documented the issue. I left my car at the dealership for investigation.
The following day, my dealer said they called Toyota and created a case about this. Toyota responded saying they heard about this and the possible root cause is the Motor Mounts on the Prius. They will be sending parts (date is still unknown) to fix the issue. :rockon:
I specifically asked if there is any damage to the engine and they said absolutely not and there is nothing wrong internally with the car. This also makes kinda sense because if I press the accelerator to the ground when it starts up, the knock doesn't appear. It also works if I put the car into D and drive away..
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Both my lowbeam bulbs went out at the same time on my 2011 back around 48k miles. I believe I read there is a TSB on this issue along with a strange engine rattle at startup.
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Lately I have found that when I am trying to go up an incline on my road, that my car has trouble accelerating. Almost as if the engine is being choked off like it is about to stall or is out of gas. I have to press the accelerator almost to the floor to get up the incline. The suddenly it will lurch and accelerate rapidly as if I have put the car in Power Mode.
I should also add that this only happens when the engine is cold. I didn't have this problem last year at all. I usually wait a couple of minutes after the engine starts before I try to drive, but that doesn't seem to work.
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Basically, when driving shortly after turning on the car (when the engine is still warming up) I often experience a 'shot' of acceleration despite not further depressing the accelerator. In other words, I'll be driving along smoothly and suddenly the car will speed up slightly by itself without me having done anything. This only occurs when the HSI is past the middle (i.e. when the engine is powering the car) and when the car has recently been switched on. It's almost as if the sensor that detects my acceleration is re-calibrating itself while I'm driving, increasing the input to the engine.
The first time it happened it was a bit of a shock and I was a little scared, however I'm used to it by now and can anticipate it happening (however it doesn't happen 100% of the time). It's nothing too serious - it probably only accelerates a couple of KMs above what I'm actually doing but still is a bit of a worry. I'll be taking it in for a service shortly and seeing what they say about.
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Slightly shaking engine and rattling noise on acceleration,it happens when the car is hot and especially when the battery level is very low ,I guess is when as more load . If I accelerate and keep it steady at 20mph I can feel a constant vibration but goes away once accelerating more....like if you're driving on a rippled surface ....that is only when engine is on , doesn't happen on electric only.
The noise it sound like a tapping coming from the engine when slowly accelerating from 0 that goes away as soon I give more gas ,is annoying wile in the traffic.? Can the sparks plugs be the problem?they been changed 120k ago.....,I cleaned the egv pipe but problem still there. Like I said is only when the engine is up to running temperature.
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I was driving my 2010 Prius on the Highway (less than 2 miles) and the engine check light came on.... shortly after the ! (triangle with exclamation light came on and then started flashing). I exited the highway and was going back home. On the way home, I noticed a decrease in acceleration and then a message 'Hybrid...'
I was able to coast into an apartment complex and then got a ride home.
After about a couple of hours, I went back to the Apartment Complex. I reviewed the manual and one of the options was to check the gas cap. I filled the tank up last weekend and haven't driven it since today.
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I'm back with another question! My 2006 Prius now has 60,XXX miles and the other day while driving with the windows down, I was climbing a hill to my house and when the engine is at a certain RPM, there is a metallic sound that comes from under the car, but more in the front. You can't even hear it when the windows are up barley, but more when they are down, you can hear it, especially when you're beside a wall or guard rail and the sound can reverberate back.
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I have a slight ticking/rattle noise under light acceleration. When I get on the on ramp and start accelerating as the rpms go up there is a sweet spot at lower rpm where you can hear it rattle and as the rpms increase it suddenly stops. Its not tied directly to the RPM, but seems to be harmonic or related to a certain frequency. I haven't been able to recreate it in the parking lot. Water pump seems ok, no visible leakage. Hasn't thrown any codes and doesn't sound like pinging/bad gas.
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Last year my wife and I purchased a 2011 certified pre-owned tiguan from a local VW dealership which will stay anonymous atm. This past weekend we were driving home and noticed a rattle coming from the engine upon acceleration or around 2k-3k. The EPC light and check engine light both flash one time whenever this happens but never stay on. I scanned the car and found a pending p0341.
I know about the timing tensioner so I waited until the car cooled completely and went outside about 1am and started the car, sure enough it made the star-up rattle.
We took it back to the dealer and they diagnosed it with a failed timing chain and camshaft and are going to replace the components. I'm guessing by failed timing chain they mean the tensioner.
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I just got my wife a 2000 Echo with 224,000kms on the odo. Everything appears to be fine other than a mystery rattling noise under light acceleration. If I were to describe it, it sounds as if a box of rocks were to be shaken around. Or like a rattling loose chain... <------ definitely hope it's not that!
From a search, it seems like others have encountered this strange noise but have not reach what the cause is.
From what I gather, the timing chains on these motors are literally never touched and should last the life of the vehicle.
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So I've noticed this alarming engine rattle when I first start car as if there is no oil? It only lasts a few seconds! Was it diagnosed with Hyundai? Maybe a quirk of the motor, but seems like over time would cause excessive wear on engine?
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Under your Prius, you have "guards" made of plastic and held in place by fasteners that unscrew off but press onto the bolt studs coming down from the metal. They basically shield the underside from debris but have holes to let water flow back out.
I had a persistent squeak for the last couple of weeks that was really annoying me. So, I set out to see what I could do about it. I thought I'd have to add an adhesive pad as a "bumper" between two parts, but when I tapped on the guard (reproducing the noise), I could tell there was a lot of pea gravel in there.
It took a while to get the first fastener off. They don't just "unscrew" that easily. The slightest pressure and you wind up pushing them back on. So, I had to work with two tools with one being a screwdriver gently prying it away from the panel so each turn made it come farther off the bolt. Once the first one was done, the rest were easy. Three in total on each side.
I got a cereal bowl full of pea gravel out of each guard. I was shocked that so much road debris was trapped up on there, but this stuff was big enough to not flow out with the water.
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Based on Rattle from driver's side door.
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I visited my dealer for something else, but I thought I'd take a chance and mentioned that my car (2010 III) had a passenger side rattle. He said that there was a TSB for that, and had a tech perform the fix. The rattle is gone. The TSB number is:
T-SB-0141-10
Upper/Lower Windshield/Rear Glass Tick Noise
The work consisted of the replacement of a couple of stoppers at the top of the windshield. I would not have guessed that this was the cause, but the rattle is gone (for two days, anyway).
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My 2010 IV has some kind of rattle/vibration in the upper glovebox. You can only hear it when taking off from a stop or accelerating at low speed.
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So I noticed that since day 1, whenever I close the door (both driver/passenger side), part of the door rattles, almost like it reverberates. It makes the car feel really cheap, and find it hard to believe that this is normal, since I never heard this with any other Toyota. I'm not sure if it is the window rattling, or the window frame.
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I'm getting a rattle in the hatch area -- making a sound as if the hatch is moving independent of the body.
Sound like the hatch is loose -- but it's not. If I grab hold of the wing and try and move the hatch ---- it's tight and I get no sound.
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