Prius (2010-12) :: 2011 - Engine Knocking At Startup?
Jun 13, 2016
Initially thought that this was related to some water in the tank, since it started when the gas dropped to 1 bar (already put some stuff HEET when put the whole tank, did 60miles so far). ODB throws out multiple cylinder misfire (codes 300, 301, 302, 303 etc). It lasts up to 3 seconds. Sometimes the check engine pops up sometimes it doesn't. there was absolutely no problem under load. does it seem like a fairly common problem ? Intake manifold clogged ?
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My 2012 with 5300 miles on it (oil change at 4400 miles) is now making a pretty significant lower end knocking noise at WARM STARTUP, as in when the car sits for about 10 minutes when I go into the store. It lasts for about two seconds, but it's significant and it's loud. It seems to have started about 500 miles ago and I can't say it was due to the oil change. Oil level is full and clean - I check it every weekend, even on a new car. Could this be a timing chain noise? Don't know. All I do know for certain is that this is very irritating and embarrassing for a new car. People around my car when I start it look at me like and seem to say "Really?"
Cold startup on my car is actually surprisingly quiet, compared to my Nissan Frontier V6.
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I once experienced the noisy engine start up.. It sounded like the engine was trying to run backwards or severe pre-ignition.
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I took my car for the engine knocking at 34xxx miles to the dealer here in NJ. They mentioned it was the EGR that was clogged, so they replaced it. 2 weeks after that, the same incident happened whenever it wasn't allowed to warm up. This time the dealer diagnosed it with having a hole in piston #1? To make the story short, i received my car 2 days ago with a brand new engine from toyota. I tried to re-create the same issue, and it would not happen. Could this be resolved once and for all.
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I have driven 25,xxx miles on my 2010 Prius. Three times during the last thousand miles I have experienced very loud and scary engine noises during start up. The car had sat for at least ten hours outside in 20-30 degree weather.
I took the car into the dealership for an oil change and my service advisor told me that Toyota was aware of the problem and the noise was not coming from the engine- but a device that mates the ICE with the electric engine. He told me that although it was a loud and dangerous sounding noise, it was not something that would harm my motor. I asked that the noise be logged into my service record.
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Sometimes I have to park my car two blocks away in the afternoon, and later in the evening i need to park my car back to the spots in front of my apartment.
EV mode won't be enough to last the two blocks, even at 7 bars. Or sometimes the car won't let me turn on EV mode, even at 7 bars (battery too cold).
So the engine must run if i want to park my car back near my apartment. But the two block distance will not suffice to completely warm up the engine
So the next morning... (20~ Fahrenheit)
My car knocks for a few seconds the next morning the car starts up...
What is the definition of completing the warm up cycle? 120F? My car will turn off the engine after coolant temp reaches 120F (ECO mode).
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My 2010 Prius V just past the 24000km mark. I have a buzzing noise coming from the engine bay during startup. It happens when the interior fan is on. You can hear it clearly after you start the car, during the silence of the "boot up", before the ICE kicks in. I can't be sure if it continues to buzz after that because the sound of the ICE drowns it out. However, If I shut off the fan during the boot up, the buzz disappears. Finally, if I leave the fan off and start the car, there is no buzz.
During a recent oil change, a hybrid technician claims that this is normal. It used to happen infrequently but now it is consistent, so if it was normal, I should have heard it when the car was new.
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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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So my 2012 plugin was parked for about 3 days, and when I turned it on, heard loud knocking and the check engine light came and stayed on.
When switching the car on or off, I'll hear two taps/ticks that were not there before. Loud knocking is not there now.
What can the issue be? It was very cold and snowing.
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so with the weather turning cooler i have noticed a new noise. i am at 34,000 miles and run synthetic oil ever 4-5k miles.
I hear a rattling/knocking noise when you start engine, not right away, but like after 15 seconds and it lasts about 30 seconds then seems to go away and is quiet again.
Almost sounds like a lifter is tapping due to not getting oil.
I changed the accessory belts a while ago and it did not first make this noise right after but maybe a few days after which coincided going from 80 degree weather down to 40 degree weather.
Could it be an accessory belt being too tight? If so, why wouldn't it make it on startup? I can see it going away as rubber expands as the warms but I would expect it to make the noise from starting till then. Not 15 seconds into running.
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Mileage 192k. Signs...stumbling/rough engine startup for first time of the day and anytime the engine sits for a few minutes before turning on again (battery charging/speed high enough for engine to start, etc).
2010 Prius engine start stumble - YouTube
Started out with no code, then check engine light started coming on. P0301, misfire cylinder #1. Sparkplugs were replaced, and coil pack for #1 switched with known good one. EGR tube also cleaned of carbon.
Stumbling/roughness has been getting worse, about an inch of coolant used per week of driving. No oil in the coolant, and no coolant in the oil (no milkshake or anything like that).
Dirty fuel injectors were suspected, but no improvement after using Techron. Finally, a boroscope was used to inspect the cylinders through the sparkplug holes, and a very slow leak was found in cylinder #1. Since liquid cannot be compressed, during the compression cycle significant misfiring occurs.
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Recently I started to hear engine pinging/knocking-like noise when the hybrid battery level becomes low like two bars and the car starts a charge cycle. I also hear it occasionally when I accelerate on uphill. Is this normal or should I take it to a mechanic?
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I have about 200k on my forester. Friday when I was leaving work I cranked it up and it made a loud knocking sort of sound. I drove it home (about 15 miles) and on the way the sound lessened. It was louder when the car was idling but she made it home ok. Next day, started the car and it happened again. Not more than 50 feet up the road we stopped at a stop sign and it sounded like a semi was starting up around the corner. Much to my dismay it was not a semi but my own car. Engine shut off. We pushed it back to the house and tried to check it out the next day. This time, we started it, didn't go anywhere, and within 30 seconds it turned off. Same loud knocking sort of sound. The confusing part is that all of this happened within two days. There was no gentle sound leading up to it for a few weeks or even a few days. Knocked on Friday, shut off on Saturday. What could be going on?
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I recently bought a 2011 Prius two from an independent car sales shop. After 2k miles, I thought I'll replace with Mobil 1 synthetic. I'm doing the oil change for the first time and made a rookie mistake. Car on ramps, assuming the car was turned off (in fact, it wasn't), I removed the drain bolt and filter.
Oil was almost drained and suddenly the engine turned on. I scurried over and turned it off, probably in 6 or 7 seconds. Car runs fine now. But, I just want to know what damage my silliness would have caused the engine.
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I have sonata GDi model 2012 ..the engine is always knocking during driving the car ..I changed the spark plugs, Fuel pump, cleaned throttle as well..some of my friends said it could be about octane range (IKA) but I put it a high quality of gasoline ( premium) and still knocking. There's one thing I haven't checked yet ,is ( injector nozzle) ..
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While we continue to enjoy our recently acquired Mineral Gray 2011 Santa Fe, I have noted a momentary engine noise upon startup after it has been shut down for say 2 hours or more.
The noise reminds me of having an oil filter with a malfunctioning or absent drain back valve where by the bearings will complain for 2-3 seconds until oil pressure rebuilds
The SF has but 20.7K miles on it to date. Do we know of this is usual for the V6, or should I be concerned and planning a dealer visit?
I love the power of the V6! We test drove a 4 cylinder model first thinking that was the way to go for economy reasons. I found this one with such low mileage, AWD, and the V6 at a great price so we jumped on it.
I am a little disappointed though that the AWD does not function "full time" like that on my 04 Dodge Durango. The SF runs rings around the Durango in the mpg department though.
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I've got a 2011 Sonata GLS with 83k on it.
Last night I was driving and started to hear a repetitive knocking sound. Stopped to determine if it was only when moving but it continued in park.
Checked the oil and apparently there was very little of it.
Don't know how I screwed that up but the mechanic heard the engine for 1 second and said I need a full engine replacement.
So, yeah I am ticked off and need to take care of it.
The VIN qualifies for a replacement under the recall but I don't know how the dealership will feel about the present engine condition.
If that's not an option, where do I even begin to look for a replacement?
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I notice some faint knocking from the engine when I accelerate. I notice this symptom during summer months.
What to do? 2012 2.4l engine ...
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My car has less than 500 miles on it. Yesterday when I started it, I heard a knocking sound. I only put 87 octane gas in the car as the manual said 87 or higher. I don't know if I made a mistake putting 87 in there.
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I am having problems with my Prius. I have a 2011 prius with 145000 miles. I also have issues with the engine shakes initial idle and goes away with check engine light saying 2 & 4 misfire. Also I had a couple off issues where I was at a dead stop and when I accelerate the engine would feel like it Boggs and shakes from 0-20 mph then go away after. From 20-80 mph it's perfectly fine.
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i have a 2011 prius II, and i noticed that rain water is leaking into the engine compartment. after i look at the hood design and how it closes, it was very obvious to me that water will leak into the engine compartment by design. i found this prius V picture online (i think it is very similar if not identical to my prius II). the blue pointers indicate holes and gaps where water can leak in, and the read circle indicates where water end up.
i have owned 2 other cars before this one, and i have never had rain water leak into engine compartment. do i have to worry about this?
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