The first part of diagnosis is to understand how frequently this happens and hopefully find any reproducible patterns. This is an open poll running to the end of October.
ZVW30 - 1.8L Prius...
I used to get great MPG's in the beginning (>57 MPG in summer) that deteriorated as the engine started to run longer and more frequently after what I suspected to be a faint bump against a garage wall in the front. This was several months ago. I have since been averaging about 47 MPG overall (averaging winter, summer out). I forgot about the bump incident until last week when the engine suddenly started running shorter and less frequently. This lasted for a week or so, with no significant changes in the weather/temperature. And then inexplicably, it has started to run longer and more frequently again. By "more frequently", I mean when I bring ICE on, it doesn't easily quit, regardless of my prodding it to quit by going into regen momentarily. Also, the initial warmup is longer.
View 4 RepliesCar starts runs rough for a few seconds then shuts off (spark plugs and 2 coils were replaced a few months ago). Coolant reservoir level was way low so I filled to the full line, kept the cap off to cycle. During the time the car starts, the coolant from the reservoir violently "boils" over (out of the reservoir). Huge amount of white smoke from the rear exhaust and a burning smell.
Used Techstream and got the following codes:
Engine and ECT: P0117, P0302, P3190, P3191
Hybrid Control: P0A0F
Intermittently get misfile codes but this time around they did not return.
I just got one of these lovely Prius C. I started noticing that sometimes when the ICE (engine) is engaged the car will shake, nothing crazy but a definite jolt throughout the whole frame. Most of the time while rolling the engine comes on seamlessly, or with a slight rumble. However like I said when rolling even there are times when there is a jolt.
I noticed the effect most pronounced, when the car is parked with AC on and the ICE turns on to charge the battery, its not that the engine is a bit loud, its the jolt and slight rumble when it starts! I hope this is normal. However the only car I feel a rumble similar to this is in a other car the needs replacement of motor-mounts. So it has me a bit worried ...
How do you warm up? I turn it on and it might start the engine for a few seconds then shut off... How do I know it's ready and warm?
View 9 RepliesIs it normal? I tried to find a discussion about this in this forum but couldn't find anything.
When coasting over 35 mph, when the speeds reaches 35, the engine (or ICE as you prefer) is starting for a second then stops. I really don't see why it would do that.
I have a Prius 2010, 4 years old with 144.000 km.
The last 3 night we had temp. below freezing point. So every time I started my Prius up at the morning, the engine starts to shake violent, and then automatically shut off the engine with a message on the screen "Check Hybrid System". So after several times I restart the car, it runs normally, still with the message on. The temperature outside was -1 degree Celsius.
So I used my OBD to pick up the codes, which says P3191 - Unknown Error.
What does this error mean at what could cause this problem?
I understand the engine turns on and off frequently (coming to a stop it turns off, then when going it turns on). I have noticed that sometimes when at the stop it will turn off, then immediately back on, and off again, even with my foot on the break.
View 4 RepliesAt 13,000 miles I've experienced the "rough start". Pulled it out of the garage to wash and wax it. I tried to put it in EV Mode but it wouldn't because the traction battery was down to only 3 bars, I assume. The engine only ran for 4-5 seconds than I shut it off, washed it and waxed it. Left it outside, temperature was about 55 degrees. When I went to start it about 2 hours later to run an errand it felt like the engine was down a cylinder and I shut it off immediately. I waited a minute and it restarted just fine. After reading the threads about the "rough start" I believe it happened because I didn't let it run through all the necessary cycles during the prior start up.
View 7 RepliesI 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.
I have noticed in certain circumstances that the engine seems to be in a resonance where it is shaking noticeably and getting worse not better. It happens in two situations.
One is after gliding and slowing to make a turn (with the engine off). As I am exiting the turn and hit the gas the car shakes a lot for about a second or two, then smooths out.
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.
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..
So I had 1st rough cold start today on 2010 Prius with 72K. Wasn't too cold low 40s. The fix was to shut it down and then turn on again.
Engine sounded like it was working on 3 cylinders. It is probably ignition or perhaps valve train issue.. with ignition being prime suspect. If it happens again I'll pull and check plugs.
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.
My 05 was running rough and misfiring quite frequently. After much deliberation, I took it in for a diagnostic hookup. The dealer said my driver side cat was clogged. Lucky for me, I was just under the warranty period(79673 miles). I have had it replaced and I can feel a noticeable difference in the way it runs. Could a clogged cat have made it run that poorly or am is it just in my head that it is running alot better?
View 7 RepliesJust recently my Prius Taxi with 340,000+Km has developed a little problem,it starts fine but after 20-30 seconds it begins to feel like it's not running properly on all four cylinders,if i go to the exhaust pipe it seems like it's spluttering slightly.
Yesterday I changed the plugs,checked air filter and all connections,everything fine, when I accelerate it feels hesitant but after the car gets up to temp it seems to go away,it only happens when i start it first thing or if it's been left for a few hours, it's never had the throttle body cleaned and I'm wondering if what I'm describing is a symptom of this?
We have a Ford Focus wagon that idles rough once the engine starts coming up to temperature. When you first start the car it's fine. For example, today I started the car, drove it up the road to the store and it was fine, but upon returning to my driveway just a few minutes later, as the engine temperature was just starting to come up, it started idling really rough. The idle is so rough it sounds like it's on the verge of stalling, but it never has actually stalled. An oxygen sensor has been replaced and it was good for a while, but now the problem is back. The check engine light is on as well.
View 2 RepliesThe car runs fine for several miles/minutes, suddenly the tach starts to climb, up a jump, then up again. This is when the engine starts to run really rough and I pull off the road, let the car cool down and make it the rest of the way to work (about 15 miles).
Here is what I have done: Radiator flush and fill; Oil and filter change; Cleaned EGR and replaced gasket; put in new spark plugs; changed the transmission filter and oil; replaced the O2 upstream and downstream sensors; replaced the thermostat 195 to 180; replace the coolant temp sensor.
The check engine light does not come on (except on start-up check sequence), so it is working. Their are no trouble codes (other than when I removed the downstream O2 sensor to check if I would get errors). The cat converter doesn't glow at night, and doesn't rattle when tapped. The resonator in the exhaust does make a rattling sound, but I don't see why that would be the problem.
I am at my wits end. Any clue what I should try next? The water pump isn't leaking.
Recently bought a 2001 Accent that has been experiencing a 'rough idle' for the last few weeks. Basically, after I've driven the car for a few minutes (from a cold engine position) and then stop at a stop light or stop sign, I can hear the engine get louder and the car starts to vibrate slightly, after I've driven for about 15 minutes at higher speeds and then stop again I can actually see the steering wheel shaking when I take my hands off of it. If i put the car in park when I am stopped and the engine is on, the idle calms down quite a bit. The weird part is that when I first start driving the car in the morning, the rough idle problem doesn't happen until about 5 minutes of steady driving - so when the engine is colder I don't experience the problem, The problem is not that serious, and Ive already brought it into a dealer who cleaned out fuel injection, gave me a major tune up and replaced all the spark plugs, but the problem still persists. I am gonna bring it back to them but they seem a bit lost to be honest. Other than this the car is driving normally when I am not idling.
View 14 RepliesI Have a 93 bronco with a5.8 the truck will start up and run fine for a while and then the engine gets really ruff starts back firing and shuts off it only starts with starting fluid or after it sits for about 30 mins.
View 7 Replies