Why is my prius engine shaking and knocking but then

Why is my prius engine shaking and knocking but then. May 2, 2018 · This can also affect the amount of fuel getting to the cylinders, because fuel flow is related to the amount of air getting through. Or it could even have been a loose or corroded connection to the ignition system of one cylinder. I have fresh oil, new battery, and had my car checked about a month ago. Maybe something to do with the coolant in the heater core. Not sure if I've heard it do it at speeds above that. If you are using the wrong type of spark plugs in your vehicle, then this could easily cause knocking noises from your engine. Solution: Replace your air filter. Mar 7, 2010 · Santa Fe, NM. From the quick research I've done in the last hour it may be bad fuel injectors, spark plugs or ignition coils. Almost chocking Jun 13, 2015 · Model: Plug-in Base. Noise from a single lifter will be at 1/2 engine rpm, coming from the top of the engine. Cold start engine shake. The engine didn't throw any codes, but Engine Shaking on Startup. Hi all, I love (d) my 2012 Prius V—it has served me well for almost 140k milesuntil it started shaking on start-up & sometimes idling. The plug was white at the end, so something wrong there. Sep 15, 2023 · High Mileage. Oct 15, 2020 · Vehicle: 2007 Prius. Like. I changed out the original spark plugs at 238k miles. mansoorch1. A spark plug sits at the top of each engine cylinder to initiate the combustion that powers the car. Get on top of it before you gotta swap engines. There’s an endless list of reasons Nov 19, 2022 · This can happen due to the following: Improper and untimely mixing of air and fuel. Model: IV. They state that abnormal vibration and droning can occur following a cold soak at low temperatures. It didn't clear the issue. It’s slow, but violent when you step on the gas a little. Then it shut down and tried again with the same result. Last EGR Valve and EGR Cooler clear @ 99,200. It seemed to have trouble switching between the ICE (engine) and electric motor. Knocking is bad as it reflects lower engine bearing damage. One of the faster ways to find out how much junk yards are paying for non-running cars is to continue to drive one with a flashing CEL. Intake leaks disrupt air-fuel ratio Apr 14, 2011 · I have a Prius Gen 3 with 206K, and am suffering from extreme engine shake at ICE startup. There is a service bulletin that potentially explains many of the reports of odd engine noise at startup, T-SB-0204-11. 5 C): • MIL “ON” with Diagnostic Trouble Codes (DTCs) P0300, P0301, P0302, P0303. Many possible causes. Has check engine light on and code P0301: Cylinder 1 Misfire Detected. Nov 4, 2019 · Bad Spark Plugs. Jan 24, 2024 · Engine misfire causes check engine light flashing and car shaking due to uneven combustion. Conclusion. 2012 Prius 2 174k mi has engine shake when it kicks on then goes normal. Improper Repair. Engine light on as well. May 31, 2023 · Started up the car and loud knocking and shaking came from the engine and resolved itself. A loose gas cap may cause the check engine light to come on. Now there's a God awful knocking sound and the engine shakes like crazy. And it doesn’t do it every time. The Lexus service bulletin about a loud engine knock or rattle noise at initial engine start after cold soak applies to 2011-13 CT200h Aug 18, 2015 · A flashing CEL (Check Engine Light) is something serious. The og plugs looked great, no oil no water. Your engine shakes because of a shortage of air and fuel in the engine. Jul 1, 2020 · If your Toyota Prius has a sputter, it is most likely going to be caused by bad fuel system, ignition system, MAF sensor, or bad catalytic converter. It’s rythmic and sounds louder to the left of the engine. Model: Plug-in Advanced. The sound disappears on driving the car a few hundred meters and usually does not reoccur for several months. I just joined Prius Chat to ask this question. Afterwards i turned on the car and the engine turned perfectly fine without the loud knocking. Oil Drain-Back Causes Engine Knocking. Also, the oil-filter often houses the prime-retainer valve for the oil pumping system. May 19, 2019 · 2012 Prius Plug-in. I have a 2008 Prius and recently hit the 85K mark. The total expense depends on various factors, including the extent of the So, here is a list of some of the most common reasons your 2021 Toyota Prius 's engine might shake or vibrate. Because of this, a faulty ignition timing could, of course, cause an engine knock. Other causes of engine misfiring are fuel-related issues, overflow of engine oil, diluted fuel, bad fuel pump, faulty ignition coils, and many more. Sep 27, 2018 · My Prius had been comfortably surviving with the clogged EGR, no issues arose. During the warm up phase the idle is horrible, very rough. These are the Denso Iridium, same part # as the original plugs. An engine mount has been redesigned to address this. Worn Main Bearing Causes Engine Knocking On Startup. So, if you put regular unleaded in your car that demands premium fuel, this could be the source of your knocking sound. With nearly 250,000 Prius in the North American market and the onset of cooler weather, it is time to see how frequently this occurs. Both issues were redesigned on gen4 engines. It’s not recommended to drive with engine knocks as it may pose more problems, such as engine seizures. It sounds like it’s having trouble just running the engine. Modern engines use a technique known as direct injection to get the fuel into the engine cylinder. Eventually after running about a minute it started sounding normal. This is an inexpensive and easy-to-do fix. After warming it up, my subsequent 15min drive went normally. My 2007 has had minor, intermittent shuddering for a while, mostly noticeable at idle. Aug 25, 2022 · If you have a check engine light on your Prius but it seems to be running fine, it may be a sign that your fuel cap is not properly attached. However, another possibility is, if you're losing oil because of failing piston rings, it will cause the EGR valve to 2010 Prius Violent Engine Shake/Rattle. Check the condition of the spark plug. The worst-case scenario is an internal engine failure. We’re talking horrible, violent shuddering. In a Toyota hybrid, spinning does not mean running. Jan 18, 2023 · N/A. Didn't fix the shaking, so then I cleaned the EGR and intake manifold. Oil Change every 5000 miles. Nevermind the noise. The poll has two parts: frequency and season. Vehicle: 2009 Prius. We turned off the power at a stop light. #2 · Dec 22, 2011. Mechanic said it might be the timing Something to note, 2010 and 2011MY are the most prone to head gasket failure, so there’s that. Oct 22, 2021 · A severe case of engine misfire may cause vehicle shaking and trigger the check engine light. Say after 10min driving it almost seems to run as usual. Bad Spark Plugs. Somewhat disappears when you hit 25, but returns as you let off the gas and let it idle. Your Prius’s engine is a giant pump. Put it all back together following torque specs and patterns to a T. Shook the whole car. More on finding oil in the spark plug well. A vehicle’s ignition system consists of spark plugs, coil packs, and maybe plug wires. Toyota has a TSB for this problem. If it can no longer shift, it could be caused by a solenoid/valve body that has gone bad, clutch packs, debris, and much more. I had a 2010 toyota prius last year which had Engine Knocking problem at startup in cold/warm weather and it was solved by this video after trying everything including TSB's. Feb 21, 2019 · Air or Vacuum Hose — Another common cause for engine vibration and power loss is when air or vacuum hoses come loose, begin to leak, or rupture. The gap was so wide because the ground electrode was eroded, no Iridium pad on the ground electrode. If it sounds more metallic, it could be a motor mount, or something that has worked its way loose. Sure enough, you give it a few moments, and once your car runs for 30-60 seconds, maybe even a minute or two, the noise goes away and your commute goes Apr 7, 2023 · It has no engine oil consumption i check it after every oil change and engine and inverter coolants are at their own levels so there are no leaks or consumption or anything. Took it to the shop - diagnosis = Misfiring. Jul 10, 2015 · Then the check engine light started blinking. Mar 29, 2012 · 50 posts · Joined 2013. I've replaced the coils & solenoids. I did not change the coils. My car was shaking & jerking at any cruising speed, fast or slow. (Just spitballing on that time. My engine will shake somewhat violently when I was at a steady, low power cruise above 40 MPH (worst at 59 MPH). Ignition system problems like bad coils and spark plugs are common culprits for car shaking and blinking check engine light. Benny Claudio said: ↑. Jul 17, 2013 · Vehicle: 2012 Prius v wagon. Spark plugs are vital to proper engine combustion. Engine shakes the entire car whenever I start it or the ICE kicks in while accelerating. Jul 1, 2016 · I have 2011 Prius Base, 137K. Jun 11, 2015 · #1 · Jun 11, 2015. jtburns3 said: ↑. Start with the simple things Jul 9, 2019 · I got my first long Engine Knock today and last about 25 sec. Driving it is very shaky as I gas it at all. Wrong Ignition Timing. Then it was on steady, then blink, then steady Took it easy the rest of the way home. MAF stands for Mass Air Flow. https://www. It never returns again until next startup. If any of these ignition components fail to deliver enough spark, your vehicle Nov 9, 2012 · When the vehicle is then later "started", the engine shakes, sometimes violently, for up to 15 seconds before it smooths out. We can't all wake up alert, every time. 2006 Toyota Prius with nearly 200,000 miles on it has a ticking noise from the engine when turned on. Obviously Google is all over the map when I research it, but signs might point to a spark plug misfire. Sort by Oldest first. One is something called an EGR valve, which is currently covered under an unlimited mileage warranty! NEW!!! Service Bulletin for Engine Knocking at Startup T-SB 0012-10 | PriusChat. This post relates to a loud knocking sound that is only occasional. The most common reason that the engine would be knocking is bad spark plugs. #2 · Mar 12, 2007. Last night my 2007 Prius engine started making noises in the engine area. Mine is 2015 Prius 4 and started to knock on morning specially when it is cold, when knocking starts sometimes longer eventually code come out P0304 misfire on cylinder 4, or P0303 cylinder 3, clear the code,sometimes no code if it recover from shaking to Sep 27, 2020 · Didn't work, so I changed the spark plug in cylinder four. It usually indicates that your vehicle’s engine is misfiring, which could severely damage engine TB, and catalytic converter. Daily commute 20-25 miles per day. It pulls in air (where it is measured by the mass airflow sensor). Model: Three. The original Denso Iridium plugs with 140,000 miles have the little pad of Iridium on the tip. My Prius Spec. After not having driven my 2012 for a few weeks, the engine started shaking/knocking upon startup. It has 2 DTC codes P0302, P0401. Smell of fumes, I think, when shaking happens while idling. May 14, 2008 · At low RPM this will cause the engine to shake. Model: Two. The knocking does go away at higher rpm . Oct 16, 2011 · We then pulled the plugs and found the gap was about . Vehicle: 2006 Prius. Be sure to check your owner's manual to find out what octane rating is right for your car. Jan 7, 2016 · If this happened after a drive, this does not sound like the rattle on startup issue. I do have questions though, so it’s only did the shake a couple times at idle. I recently had my oil changed at Toyota dealership at 11,700 miles. and the engine shaking. It has happened in both cold and warm conditions. After running the engine for 30 - 45 seconds it operated normally. Not enough air equals not enough fuel. By today it would be fine through most of the warmup cycle, then start misfiring (resistance would get jacked up once it reached temp), but I couldn’t run it long enough to actually get the check engine light. A misfire causes may cause the Prius engine to shake due to improper engine operation. Maybe just harder to notice as the engine turns off when gliding and stopping. Drove to work and on the way the check engine light started flashing and stayed on. Here are three methods to help diagnose the cause of an oil leak: Visual Inspection. I moved coil 3 to coil 2 when changing spark plugs, and still getting same misfired code P0303. . Feb 11, 2020 · Cleaned the Intake Manifold. Apr 10, 2015 · 2012 Prius c. " Sep 29, 2020 · Engine knocking could indicate different issues, including low engine oil levels and engine bearing failure. I thought this process would be smoother (at least it seemed that way when I took the car on a test drive). A rattling or knocking noise is common Jul 28, 2020 · A misfiring engine is one of the most common reasons your Prius will shake when accelerating. At home is where I saw the engine shaking and extra noise from it (visions of piston rod slapping Jun 30, 2012 · After starting my Prius the engine was knocking and shaking. Model: N/A. Non-mechanical causes such as uneven tire pressure or worn tires, or poorly balanced wheels can also cause the car to shake. It lasted about 3-5 seconds, and ran perfectly afterwards, even making another cold start later on @30 without issue. Jun 7, 2014 · Recently the shaking / raptor noise started to occur while idling. Should begin to throw codes sooner or later. There could also be a problem with the throttle body or the fuel injector in your car. I hope it helps someone out there with the same problem. Today it went full-fledged rocket ship on me. If there is a problem with these parts of your car, it Mar 12, 2007 · 2097 posts · Joined 2004. Update. Faulty and erroneous sparks created by malfunctioning spark plugs. Dec 21, 2011 · 696 posts · Joined 2005. Mar 30, 2011 · Model: Four. ) The check engine light has not come back on all day. Check engine light is blinking which describes misfire. p0301 is the first CEL code this car has ever thrown, and it happened right at 247k miles. Mar 13, 2024 · Cause 2: A faulty fuel injector. It started running rough at around 110,000. The only code they were running was a PO4 code. Have you ever ran the car so low on engine oil it threw the engine icon on the dash. These have a damper between the engine and trans that gets real loud when you have a misfire or if the engine doesn't want to start. The first thing you should do when diagnosing engine knocks is to check the oil level and refill it if necessary. Had to return to the shop because the problem resurfaced. It's only if the ICE is off for maybe 15 seconds or more, that I have the problem again. An engine misfire occurs when there’s incomplete or zero combustion in one of the cylinders. Picked it up after 2 days and upon starting heard a very loud rattling sound from engine; as if it were going to drop right out of the car. A couple of weeks ago, about a week after my most recent oil change, I started noticing a noise when I accelerate. It’s never safe to drive when your car is shaking. Oct 12, 2008 · Then shift to P and fully depress the accelerator pedal 2x. It happens rarely, but when it does it sure is startling! I just missed capturing the sound on my phone. 2011 Prius with loud rattling motor noise as well as what seems to be the engine shaking. Jun 10, 2013 · I seem to have similar knocking issues , which usually occurs when the engine is running hot . Aug 15, 2022 · This could be a result of worn-out or badly installed spark plugs. and when engine is cold, I always shut the car off when engine is stopped. There was even some scuttle-butt about Toyota being close to issuing a TSB to fix the problem & some months ago a Toyota Jan 16, 2023 · If the misfire did not follow the ignition coil, check the spark plugs next. Now it knocks while driving and after the engine is already warmed. The three necessities for all combustion engines Jul 24, 2019 · So I've had several brief periods of engine knocking on startup over the last couple months, but they went away and my 236k 2010 Prius drove fine afterwards. M. If you use the wrong spark plug which cannot tolerate your engine’s heat, then it will Aug 2, 2016 · Knocking is much worse and sounds much lower frequency and much more distinct. If it is an older model, it’ll have a distributor and coil instead of coil packs. Then press on the brake pedal and make the Prius READY. Mar 17, 2019 · "Some 2010 – 2011 model year Prius vehicles may exhibit one or more of the following conditions at initial engine start after cold soak in temperatures below 40 F (4. The engine change is immediate and starts and stops in sync with the extra load of the HV battery charge cycle. A: There are two main causes of cars shaking when hitting a bump, mechanical and non-mechanical. This morning I went to start my Prius (2015 Toyota Prius Liftback 5D I4 Hybrid) and it made the same noise as in the video below (not my video, credits to the original uploader): I turned the car off and back on, it was still there but way less violent. Replaced spark plugs - problem fixed for a day or two. New ignition coils, Still rough. • Initially runs rough. The event last about 5-10 seconds. Insufficient and inaccurate compression. My 2012 Prius v, which has done about 47,000 km, has intermittently developed a knocking sound when the IC engine is idle, or while driving at a low speed (under 30 km/h). Nov 2, 2016 · So after having the prius sit for roughly a few hours, i start up the car and i heard really loud knocking noise and the engine shaking violently and I felt the car also shaking a bit too as a result of this i immediately turned off the car. Here’s my experience with obd2 code p0301. • Loud engine knock or rattle noise. Seems my coil on cylinder 1 was just haggard. Hi, jnuir, You're not alone in hearing a very noisy start-up of the Gen3 Prius (2010 & 2011), especially with a "cold" start. The engine starts with knocking, rattling, and vibration that lasts for about 5 seconds. This sensor calculates the quantity of air inside the car engine. May 15, 2009 · My Prius had some shaking and knocking sounds from the engine (it felt and sounded as if I had a flat tire) while I was driving. Worn Spark Plugs. 055. by the time I got it out of my pocket and unlocked the knocking was done. It only happened for a minute, and hasn't done it since, but I was wondering if anyone knew what this might be. Swapping the plugs was likely just enough to change its environment and caused the failure. Look for any signs of oil on the ground under your Prius or on the engine itself. 6 days ago · 3) Incompatible Spark Plugs. Got spark plugs replaced and a couple ignition coils + boots. Car seems to be moving fine. Brace yourself—repairing a head gasket can be a costly affair. But a couple days ago, I was idling a lot waiting for my girlfriend to finish errands, and after another 30 minute idling session, my engine started knocking and shaking hard. If it runs smoothly during idling is there anything I can rule out? Oct 19, 2015 · 2015 Prius c. You will see the hybrid vehicle icon appear on the MFD and the gasoline engine will run continuously. So, I just had this happen to my 2012 Prius a few months ago. 2012 Prius Plug In 247k miles. After that it ran fine all day, then that evening shook upon startup. Any advice would be helpful!!! The car is almost 7 months old and has 12,200+ miles. Hope this helps you some how Location: las vegas. Some can tell by the speed and location of the tick. Detonation Knock: Bad Timing. Took it to the dealer to diagnose and they said the head gasket failed and is leaking coolant into the engine. Apr 24, 2013 · Vehicle: 2008 Prius. My mechanic found a load of coolant in my engine and suggested I replace it. 5. The rattling didn’t occur on every start up and the check engine light would turn off after driving a bit. But the rattle/knock cold start and rough idle on cold start doesn't appear until the spark plugs get carbon buildup on them causing misfired on 1 or more cylinders. 2) Engine sound can be valves out of spec (more of a clatter) or bad connecting rod (knock). No knocking sounds or anything like that, oddly enough. There needs to be a strong spark in order to achieve strong, clean combustion. xcntrk said: I've noticed occasionally on cold start the combustion engine has a terrible vibration and knocking that occurs for the first 1-2 seconds of ignition. Cleaned the Throttle Body. SoCal weather has been raining last 3days, but NO flood in my area. I believe this happens if you shut off the car when engine is running. It seems the white smoke/heavy shaking worked itself out after running the car for a while. Jul 6, 2017 · 1) The remanufactured battery is going out. If you put it in gear it goes away, then upon acceleration it vibrates to about 2500rpm then goes away. Jun 10, 2013 · My symptoms of the engine going wroom, wroom, wroom when cold start and warm up phase if way worse then when the engine is warm. It usually occurs while the engine is charging the traction batteries and as I accelerate the car from rest gradually ,the engine begins to knock at low rpm . Do a search & you may find some of the threads. Jun 1, 2023 · Now, let's talk about the financial side of things. 1. Mar 20, 2006 · rohnert park. LCDuncan said: ↑. Nov 21, 2019 · 0. If you catch it early enough, it might be as simple as replacing the serpentine belt or slightly readjusting the tensioner arm. Like many in this forum, I just experienced the rough cold start for the 2nd or 3rd time in my 2011 Prius (71k miles). If I keep the engine running, or occasionally rev it while sitting still, it is fine. Turned it off and back on a third time and no noise, and Dec 18, 2020 · But as soon as the ICE kicks on, the shake comes back. Do not drive the car in this condition as the traction control is disengaged. A week later I get the cooler replaced and that's when the shaking started. It has 254,000 miles on it. Nov 14, 2010 · 2017 Prius Prime. Location: Canada. * This problem is now easily created at idle each and every time the HV battery drops below 2 bars and requires charging. Quoted me $3700 to replace due to it being a labor intensive job. I initially thought the same thing, bad gas and then went with 93 octane and fuel cleaner. 3. When it malfunctions, the readings and calculations of MAF are affected. Two shops and $500 later and the problem is still here. I have 30750 miles on the car. Jun 10, 2013 · Hi all, I started up my Gen-3 this morning (it's somewhat cold - 25 degrees) and the engine was shaking really badly as soon as it tried to kick on. Mar 14, 2023 · If this knock sensor has gone bad, it can send false signals to the engine control unit, which will cause a knocking engine. It fixed the Cylinder 2 misfires, which was caused by a coolant leak into said cylinder. Shut it off and re-started ok, but very concerned. Hope that helps. Sep 26, 2019 · P0700 is a common code if it’s an electrical issue related to the transmission. So like 10-30MPH. Aug 20, 2023 · Loose or Disconnected Hoses: Loose or disconnected hoses can cause air leaks, affecting engine balance and causing shaking when shut off. Toyota attributes the Gen III engine shake to water condensation on the inside walls of the intake manifold -- water that gets into the cylinders and obviously does not burn like gasoline. Jul 5, 2015 · The knocking and shaking happens right when the ICE kicks in after I started up the car and then goes away in about 5 to 10 seconds or when I changed gears on the car. I bought my 2012 Prius v with 99,000 miles. Vacuum Leak: Vacuum leaks lead to an unbalanced It started out as light rattle and gradually got really bad. Some early gen3s with frequent oil changes do better on oil consumption. It most often happens when the Prius C has been shut off for some time – or when it has been shut off for a while, moved a short distance and restarted some time later. Sep 10, 2016 · Exhaust noise will vary with manifold temp. Major mechanical problems, such as a spun connecting rod bearing, will cause your engine to shake, rattle, and roll. Worn Out Spark Plugs In many vehicles a common cause of engine vibration is worn out or faulty sparkplugs. If it happens again, worry. A very precise amount of fuel is delivered by the fuel injectors controlled by the ECU. My C had a horrendous knocking on a cold start @40 Fahrenheit or so. Too advanced ignition timing will cause the engine to start knocking or pinging. I went to take it to get the oil changed & it started making a loud knocking noise & seemed to be shaking. com/watch?v=-gSTKHldJ6M. youtube. Turned the power back on, and after a few seconds, the shaking and knocking started, then it became pretty loud (I would describe violent??) then the check engine light came on. Jun 13, 2019 · High octane fuels burn more uniformly and resist knock. Drove to the dealership and they wanted $400 to diagnose, so stopped at the aitopart store and code for cylinder 2 misfire was read. The shaking at startup varies in intensity and seems worse on colder starts. When a spark plug stops operating, the cylinder it’s connected to can misfire. Mar 7, 2024 · The 5 Reasons Your Engine May Be Shaking & Vibrating. Over time, spark plugs will wear down from typical use and potentially become dirtied with carbon and oil. Feb 7, 2022 · Soon as the engine runs for a TINY amount of time, it goes away. The first step in diagnosing an oil leak is to perform a visual inspection. daktron said: Hi all, When the gas engine starts up/turns off it does so with a small "jerk" (or in other words I feel a vibration in the cab when the engine comes on/powers down). Over time, spark plugs naturally become contaminated. . Jul 6, 2022 · 2011 Prius. Malfunctioned MAF sensors can cause your car to start shaking and then dying. If not, shrug your shoulders and smile. I installed new OEM plugs. The air is then guided into the cylinder where fuel is added and compressed. It seems to be an intermittent, rare event. Dec 24, 2009 · Many cars use hydraulic tappet capsules, and similar capsules for thrust on the cam-chain tensioners (instead of a spring). Feb 23, 2023 · Why is my Toyota Prius engine shaking while driving? Any unusual shaking or vibrating forces coming from the engine is cause for concern. Vehicle: 2005 Prius. Basically, spark plugs have different levels of resistance to hotter temperatures from the engine. Aug 7, 2023 · An engine knock sound caused by a bad tensioner, belt, or pulley problem is usually a cheap fix. You can break that damper if this is allowed to continue. Sep 5, 2019 · Model: Five. You get a rough and shaky motor plus a Check Engine Light. Spark plugs are also a common culprit, especially if they haven’t been changed in a long time. Jan 23, 2020 · The egr system design is faulty, which causes carbon buildup thru out the whole system, including the spark plugs. 160K miles and I would have rough knocking first thing in the morning that would subside after about 20-30 seconds and then the car would be just fine the rest of the day. Still rough. Dirt gathers on the MAF and sometimes sabotages the correct air calculations in the car engine. Could be when the car was reassembled after repairs something may have not been torqued down correctly. Outside weather Temp this morning about 50 F. Sep 22, 2019 · Ignoring an oil leak can lead to serious engine damage and costly repairs. It's probably a misfire, but if simply may not be starting. The vibrations can be caused by the broken parts knocking around inside the engine, as well as the misfire that results from the failure. Bad fuel injectors are another very common engine problem that can cause engine shaking and a check engine light. #14 · Feb 14, 2014. A brief lack of oil on start-up can easily give a brief knocking, until oil gets to where it needs to be. Jan 16, 2022 · A secondary issue is 2010-2014 Prius engines have flawed piston rings that often cause excessive oil consumption that ends up in the egr cooler passages. Model: Four. The bewildering part about it is that there is NO CHECK ENGINE LIGHT. Code reader said P0138 Oxygen sensor circuit high voltage bank 1 sensor 2, and P0304 Cylinder 4 misfire detected. Doing so can damage the catalytic converter and other costly parts. Remove the ignition coil. Below are ways you can fix such an issue. If this doesn’t work, you’ll likely have to replace the bad tensioner or the accessory pulley. An exhaust noise will be at 4X engine rpm, coming from the bottom rear of the engine. Nov 22, 2011 · 2007 Prius. The car is always parked in our garage and the outside temperature was approx 32 degrees or a few colder. I've never had any issues with it. See attached. It could be something as simple as old spark plugs producing an uneven power delivery , it could be something serious like worn or broken engine mounts, or it could be even more serious in the case of Oct 31, 2016 · Vehicle: 2015 Prius. leaving unburnt fuel in cylinders. Possible fowled plug or failing coil (there's one on each plug). Apr 22, 2016 · Five. The other day when I started the vehicle the engine made rattling or knocking kind of noise for around 5 seconds then it went away by it's own it has happened 6 months ago Mar 23, 2013 · Three. In such a situation, your Prius will produce a rattling noise. Worn Accessory Components Cause Engine Knocking On Startup. Time for new spark plugs. Dirty Spark Plugs: Dirty or worn spark plugs misfire, causing engine imbalance and vibrations during the shutdown, and sometimes car shakes when turning off. It's kind of a wah-wah-wah-wah or wuh-wuh-wuh-wuh noise that gets faster the faster I'm going. I had someone look at it & they said the motor was shot. I have a 2008 Prius. Vehicle: 2012 Prius v wagon. May 11, 2005 · It doesn't do the cold knock currently, but it happened in the past a few times. Feb 21, 2023 · 3. Fuel system defects from clogged injectors can also lead to engine misfires and car shaking. Model: Prime Plus. A good, experienced mechanic should be able diagnose it immediately by ear. When the engine is on the ticking is heard and appears quieter at higher speeds but noticeable at all times. Hope this video helps out to my "ticking" sound. 150k-ish miles btw. Check the spark plug well for debris or fluids like coolant or oil, which could also be the cause of a misfire. Usually caused by running the car low on engine oil. Unorganized internal components. The valve was replaced first, still no problems. Last night I experienced a somewhat troubling event. I am still getting code P0303 after replacing spark plugs and cleaning fuel injectors. A loud mechanical knocking noise and visible shaking of the engine, then perfectly smooth. If something has gone wrong in the transmission, your Prius may not be able to accelerate anymore, or it’ll. Jan 30, 2018 · I'm not entirely sure the science behind why the head gasket would *not* cause the check engine light when it was warm out and I drove it around after it was ready, then *would* cause the check engine light when it was cold out, and I turned on the heater. I had it towed to my dealer and it was diagnosed as needing al four spark plugs replaced, one “coil” replaced, and a throttle flush. When this occurs, the engine will stumble and run rough, sounding as if it is misfiring. Yr 2013, 119,920 miles. Good morning, everybody! . Over time, spark plugs can fail for a few different reasons: Apr 10, 2021 · A damaged EGR valve can hang open and cause excess flow on startup. Some shaking is also apparent only for the first 30 seconds when oil is overfilled. Vehicle: 2012 Prius. Model: II. Mechanical problems such as engine and transmission issues, or suspension/steering system problems can cause the car to shake. Worn out or dirty sparkplugs will cause the2021 Toyota Prius s engine to misfire or not properly fire on each and every cylinder. Internal Engine Failure. It starts fine, gas engine starts fine as well, after about 30 seconds or more since gas engine starts, engine starts to shake, vibrate, knock so violently that it feels like it would blow up. and/or P0304. eh wm xz uz ay jd el ao el ss