Prius (2010-12) :: Cruise Control - Car Slowing Down Suddenly And No Acceleration
Dec 22, 2014
I have had my 8 month old Prius for a week. I have used cruise control fine before and after the incident. All of a sudden we started slowing down. Doing any thing on the cruise control had no effect. I canceled it. But every time I pressed the accelerator I just got the amber warning light come up and the car beeped at me and no acceleration. The cruise control didn't get the car going either. I had to stop on the motorway. Put the car into park then put it into drive and drove off fine and the car has worked fine since.
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My cruise control all of a sudden stopped working today.
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I love the car and SCC is one of my favorite features. I've had good experience with the SCC most of the time - if car in front of me is moving and then stops, it reacts well. (Also was pleased to learn I can resume SCC from a stop by just tapping the accelerator, no need to hit resume like the LCD screen implies).
However, the one situation is when I'm going like 55mph, and up ahead there's a car stopped completely. I'll see a thing on the dash that the SCC recognizes there's a car ahead, but it won't hit the breaks till the last minute. Truthfully, I end up hitting the brakes myself in most of these situations.
I've got the longest distance selected (though i've tried it with short following distance too) and my car is a Limited 2.4 GDI.
SCC stops fine if slower car ahead stops. Seems a little risky when car ahead is already stopped (waits till the last second for brakes?).
I've also tried changing the setting for cruise control response from "normal" to "fast"...maybe i'll try "slow?"
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If i am driving say for 15 mins on the highway at 65-75 mpg with a few brakes and accelerations in between due to other cars around, is it better to use the cruise control (i have adaptive cruise control on my prius v) and let the car figure out the throttle and braking or is it better to just drive by myself without using cruise control? i read about the different pulse-glide driving methods.
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As odd as it may sound, our Prius salesman told us we should not use the cruise control on our 2010 Prius II for the first 1500 miles. We could not find any such warning in the manual. Did we just misunderstand or was the salesman correct?
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Twice now, while going downhill hill (steep grade on freeway) my Prius has revved up to over 4,000 RPMs with the cruise control set at approximately 65 mph. The noise of the engine was my tipoff and I immediately had to turn the cruise control off. This just doesn't make sense to me! Seems like this could be a potential problem for those of us utilizing cruise control!!!
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About 2 months ago, I was driving and my cruise control wouldn't engage on the highway ... I happened to be right near the dealership so I immediately returned there .... didn't turn off the car, but the tech put it in P while I was waiting. I was so ticked off because I thought that may have 'reset' things, and of course when the tech took the car for a drive (in D) the cruise worked fine. We of course never confirmed that the cruise control didn't work.
Today, the same thing happened at the same place, so I returned to the dealership, calling them on the phone, and informing them that I would not turn the car off, or allow the car to be put in park. The service manager met me out front and we went for a quick ride so I could 'prove' that the cruise was inoperative. He confirmed that it was not working, and why. For some reason, I glanced at the dashboard and noticed that the car was in 'B' mode. I mentioned that to the manager and he noted it as well. I must have bumped it somehow while driving as I NEVER use B mode for anything ... ever. I said I wondered if that was the reason, and put it in D, and lo and behold, the cruise worked again.
I haven't checked the manual yet to see if this is stated there, but the cruise control is inoperative if the car is in B mode. Or at least it seems that that is the case. Other than the car being in B mode, it acted just like it always does, and since I was on the highway, I never noticed the braking effect that B mode gives you.
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I've heard that cruise control reduces mileage. This was in relation the Honda Civic Hybrid (Gen II).
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No cruise control, ABS, Brake and skid light on (Prius 2010).
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Not sure if this should be under the technical section but is there a way to modify the cruise control to be set to a position on the hsi and not based on the speed. After all it is all electronic.
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We have 2 trips coming up this summer (600 miles and 1400 miles), these will be my first long distance with the Prius.
Did anyone tested fuel economy using the cruise control in ECO vs NORMAL vs PWR ?
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Never had any issues with it before and was working fine on a trip a couple of weeks ago. On the way home I had it on, we stopped to get some food, and then when we started up again cruise control wouldn't turn on at all. I tried turning on and then setting, but nothing happened so I don't think it's the light. Checked the fuse and it looks fine (no noticeable distortion or break to the wire anyway) and brake lights all work.
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Is the drcc on the 2013 full-speed range or is it partial speed range? (will it bring the car to a stop or does it only work above certain speeds?)
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2012 Prius with 10K miles.
One of the features I really like over the '06 Prius is the ability of the cruise control to hold the set speed on downhills (until the battery fills up and it switches to compression braking "B" mode, but that's a different topic).
After taking it in for the 10K mile service, it no longer engages regenerative braking on downhills with cruise control set. This is on the same hills where previously it would hold speed.
Did Toyota do a software upgrade that disables this feature?
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Cruise control not working all of the sudden - This happened to me, and a web search led to a quick solution, would be the first place to check if you have the problem.
Turns out that if the third brake light (back of the cab) goes out, so does the cruise control. Don't know why. I replaced the bulb, and cruise works. I was fortunate that this super cheap fix worked for me. If your cruise control stops turning on, check that cheap little bulb!
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What are the most and least optimal times to use cruise control at highway speeds?
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Curiosity question. I've noticed that on a downhill of a couple miles, especially in "braking" mode or with the cruise control on, the motor/generator and engine are used to keep the speed down and the battery gets charged to the very top quite quickly. That's good!
On a really long downhill, will the motor/generator still be used for braking and the excess electricity discarded to keep from overcharging the battery?
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So I'm driving along with everything fine till I pull into a neighbors driveway to drop off some stuff. As I pull in, the check engine light suddenly comes on and the cruise control light starts blinking. As I have a scangauge II always connected, I put the car in park and check the code. It comes up as P0000. I get on my Droid III and google it - all I see is "null code" so I clear the codes and everything is fine. I figure "that's odd, but whatever". I drive home (about 1000 feet) and park and shut the car off and go inside to mull this over.
I go back out to check out the scangauge again and it requires starting the car to read out the codes. The car won't start. The battery is fine, and in fact it does the "rurrr rurrr rurr" strongly for 10 times before I figure it's not starting. I wait about 30 seconds and try again - same thing. I wait about an hour or two and try again and it starts this time right away, but then stalls right away. Start again and manually give it some gas and it keeps idling weakly. I'm able to back out and drive a short distance and come back without a stall. I let it sit for the weekend (no shops open anyway) and start it monday morning with my AAA card out... and it starts fine and runs fine all day. I basically forget about it.
About a week and a half later, I'm driving along a country highway at 55 Mph, and the same thing happens. Check engine light, cruise control light blinking and the cruise actually cuts out so I'm losing speed suddenly. I run the scangauge again and same code. The car keeps running fine though, I'm able to drive it back (w/out cruise control) the 5 miles home. Nothing out of the ordinary.
I go inside and google this some more, and there's some posts about the Scangauge causing this - but I've been using it for about 4 years w/out this happening. That said, about 2 months ago, there was a recall, and they flashed the ECU with some update so maybe that changed something, but still - worked for months before this happened. I had to get to work etc so I just cleared the code again, and so far 3 days without a recurrence. Currently I'm thinking about waiting to see if it happens again and going to Autozone and have them read the code to see if it really is the Scangauge not reading the code right or whatever...
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My 2010 Subaru Outback recently surprised the hell out of me by simultaneously turning on the brake warning light, the traction control light, the check engine light and (just for a bonus!) disabled my cruise control while flashing the cruise control light. I pulled over, quickly surmising that all of those systems could not have failed at 70 MPH without instantaneous death to either me or the vehicle. Both apparently still being alive, I tried turning the car on an off to reset the lights. No go. Subaru was not going to miss this chance to get me to the dealership! (who I had avoided to this point!) As I was far away from home and the car being very healthy, it seemed, I decided to drive on. I proceeded to put a couple of hundred more miles on the car before I got back to town.
My car had 39,000 miles on it, 3,000 miles beyond the warranty end. I learned that I have an error code of P0171, "Fuel Trim Malfunction (Air/Fuel too lean)". So I guess I'm wondering about a few things...why would this sensor set off every light on my dashboard and disable my cruise control? Seems a bit overblown for running a bit lean. My gut tells me Subaru has a sensor/software problem they are not owning up to. I'm a big fan of conspiracy theories and this really smells like one...
Second, jeez, I'm only 3K miles over warranty, don't you think they'd cut me some slack. I mean I love my Subaru, or did anyway, until this happened. Now it's just another POS car that breaks for no apparent reason...
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The car seems to start accelerating on it own. Say cruise control is set you notice acceleration for no reason. Now cruise control does not work and acceleration at times still happens. It's not like you are flooring it just keeps going faster slowly. Don't know if this could be related I did replace the fuel pump recently and the crankshaft position sensor. I was looking to see if there is a re learn procedure for the crank sensor. I have replaced them in the past and don't remember having to do a relearn.
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Recently I was driving on the highway, about 70 miles into my trip, when all of a sudden my cruise control kicked out and the rpms went high and then I lost acceleration. I pulled over to the berm and tried to take off. Problem is I could not get the car past 30mph because the accelerator pedal could. not be pushed down more than an inch or two no matter how hard I pushed. What could be wrong???
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