Prius (2004-09) :: Engine Idle / Won't Shut Off And Runs High
Jan 26, 2012
I've noticed the last few days that my Prius seems to be dropping MPGs horridly (even worse than the typical winter drop). The engine will idle hard and loud when stopped sometimes or when braking even. I noticed this morning, when I am braking to a stop, the MPGs are registering at 75 or below and it's running when idling and it seems to be running the gas engine more. It will sometimes shut off at a stop light, but hardly at all the last few days regardless of if it's been running 5 minutes or over an hour.
I thought maybe it was because it's cold-- we've dipped to single digits, but have been above 30 or so the last week or two and has only happened in the past two or three days. It happens at start up and at the end of my hour long commute to work. I've turned off the defrost and heat and it still does this.
She's a 2005 and has just over 105,000 miles. I just had her oil changed, a fuel injection cleaning and spark plugs replaced two days ago and had the inverter serviced and recommended transmission work done at 100,000 miles. Her water pump was replaced in the last year with the recall. I just replaced the air filter. There are no warning lights, so I"m not sure if anything would show up with the codes. I'm worried because it did not do this previously, and started to as soon as I got the car back from the injector cleanings and plug work...
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Title sums up the whole post. My Prius tends to use a bit of oil, I don't know the exact numbers just that it can't go without a couple top-offs between 10k oil changes. As much as I love this car it's because of that fact it will be sold after it's paid off as I've never seen a car that uses oil and yet drips none onto the ground.
Anyways it's because of its oil consumption and me not being used to having a car that needs its hood opened between oil changes that I've worried and wondered if I forgot to check it and it gets low enough to make the oil pressure drop will the hybrid system turn the engine off assuming I'm going slow enough for it to do so? I understand if I'm going over ~40mph the engine has to be spinning to prevent MG1 from over-revving.
So lets say I'm doing 65 on the interstate and the triangle lights up then I slow down and come to a stop will it prevent the engine from turning back on, or I'm sitting at a light and the engine is running because the heater is on then the oil pressure drops will it prioritize protecting the engine over the heater? Or is it like a typical car it will warn me but it's up to me to stop the car and turn the engine off as fast as I can to lessen the damage that is being done?
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I had my AC charged and belt replaced after this all is done I noticed the cooling fan likes to run a bunch now - its 80's outside and the cooling fan runs all the time.
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Here is my question.. 94 Z28 38K 6spd. Starts right up and runs well, for about 15-20 minutes then will shut down( like the key was turned off) When this happens I have no signal to either the ignition module or to the injectors.
This car was damaged by an idiot that flooded the dist. with coolant doing a flush. They replaced it with a Advance auto remain. This is when the trouble started. I did replace the I/M with an AC OEM Module, no change, verified all wiring from the computer to the Dist. and I/M. All checked out. I am thinking that the cheap remain unit is my problem and am looking to get the MSD Opti spark system to hopefully fix and to prevent this problem from happening again.
I cannot retrieve codes (94 won't flash CEL codes). Is there any other method of diag I could use to verify my suspicions. Oh, there is not response from the Tech either once the engine dies.
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My son's 2001 Dodge Neon tends to run hot. The radiator fan comes on while the engine is running, but does not stay on when the engine is turned off, even if the temp indicator is in the range where the fan should be on. Wiring diagram looks like the fan control relay only works when the ignition is in ON or RUN, which would indicate that this is the way the electrical system is designed, but that seems weird...I thought the fan is supposed to operate even if the engine is turned off. We have already replace the thermostat.
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I am a new buyer' bought my prius 2008 about a week ago. the is something i cant understand, when a the engine runs at idle speed, the fuel consumption monitor shows 99.9 km/liter ! ! ! and it's also calculated at the average... is it something i should worry about ?
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2004 2.4l engine has high idle speed aprrox. 1000rpm.
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I cleaned my daughters throttle body on her 2005 prius. Sprayed it down on the vehicle trying to fix my P0505 code and now its idling high. Is there a learn procedure to reset this after service.
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Had a first-time issue with my car today. Background, 2010 II bought in June, just short of 15K miles, never had any kind of mechanical issue.
While en route to work this morning, I was about halfway into my 15 minute drive to work, when I noticed my engine was idling very high, I would guess 2500 rpms. It started doing it while I was driving around 35 MPH, then continued doing it while I stopped at a traffic light, and continued when I continued driving to a speed around 50 MPH. The high idle while stopped was not transferred to the wheels, so it was not a safety issue as it would be in other cars.
When I got back up to 50, curious to try something, I hit the ECO mode button and the car returned to normal. I took ECO back off and the car was still fine. I had no further problems.
I would point out that this morning was about the coldest temp that the car has experienced. Outside temp ranged from 7 to 10 degrees.
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How can you tell if the EBH is working? I thing there is a little bit more heat coming from the vents, but its hard to tell. I am thinking of putting the car on ramps and touching the block next to where the EBH is. The gas engine doesn't seem to be shutting off any faster.
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My Gen 2 2006 Prius engine works continuously and does not shut down even when car is stopped and parked. It shuts down after pressing power button. Problem started after I changed oxygen sensor and then car was reset by computer, could these actions cause the problem? What kind of problem is that and how to fix it...
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My sister has a 2007 Prius that continues to have electrical problems. The latest is the console will go dark and the engine will not shut down. The dealership is stumped.
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My Prius engine wouldn't shut off when the button was pushed. The Toyota dealer was clueless.
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So the gas engine shut off (I filled up the tank yesterday) when I was on the highway and the engine light came on, the triangle ! light came on and the hybrid system light came on on the GPS screen. I pulled over and turned it off, check the oil, which was a little low, but there is some in there and eventually the gas engine started up again, but it didn't sound very healthy. I need to get to work tomorrow morning...it's at the mechanics and I trust him, but if it's something stupid and silly, maybe I can just do it myself and not get charged for any diagnostics.
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I got an 2009 toyota prius I was driving home one day and car shut off and check engine light came on after 10 mins of the car being off I try to turn it on, it started with the check engine light still on main battery light came off, I ran to AutoZone and got my car scan for codes and P0121 was my code tps my car has 120k miles what should I do clean the throttle body? Replace the sensor? How would I test the sensor if it's bad?
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Yesterday afternoon after warming up (car still in park) the engine shut down was very rough. I heard a quick string of maybe 5 or 8 loud bangs under the hood. Sounds like something got loose and banging inside the engine compartment and ready to fall off at any moment. This morning it was just a bit rough but not nearly as scary. Other than that the car seems to work fine.
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I would like to know if for the Accent 2003 there is a component that commonly fails and causes a P0108.
Vacuum seems to be ok. At least I can't find any leaks. Pressure at idle is normally at about 30kPa (4.3PSI). It ranges normally between 30 and 50kPa (7.2PSI). When the fault was set it indicated 125kPa (18PSI).
Sometimes the engine runs unstable at idle.
It seems to be an intermittent fault. If I clear the fault it can take about 2 days to reappear.
Otherwise I will have to go through checking the MAP sensor itself, wire harness, idle motor, is that about right?
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Changed timing belt after several teeth being stripped. Engine runs but won't idle without foot on gas pedal. Drives smooth as long above 2000 rpm. Thinking there is one or more slightly bent valves. Quadruple checked timing marks. Coils are good. Fuel injectors are good. Spark plugs are new NGK's. DTC's are 0300, 0301, 0302, 0303, 0304 - misfiring.
Have a line on a low mileage head with warranty. 2007 Accent 1.6L?
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1996 Ranger 2.3 140 CID XLT 126,000 Miles. When coming to a stoplight or stopping the engine idle is low and causing engine to almost die. Engine has been stuck at high idle a couple of times. It started with the engine idle slowly coming down and now it its too low. I suspect the Idle air control valve.
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I have a 2003 Lincoln Navigator with 156K miles. The engine shut down without warning. Towed it to the nearest Ford dealership. They could not find any codes from the computer, but note that compression was lost in the left cylinder bank. The mechanics said the likely cause is a cracked cylinder head and this known to occur in my model year.
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Motor started to misfire while out on grocery run. scanner said mifire on #1 so I bought a coil and plug. car ran well for a day then same thing on # 2.. repeat.. then # 3 repeat so did #4.
Now it did it again on #3. I switched the coil #2 and #3 to see if scanner would show if it followed the new #3 coil but so far no code. The misfire is on light acceleration, push down hard and it does not miss. Today I will try some fuel injector cleaner.. Is this the trail I should be following ?
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