Prius (Gen 2) :: Car Slow Down And Suddenly Lock Up When Brake Applied
Apr 1, 2013
I have a 2005 Prius that worked fine until I was told last year (March 2012) my brake pads needed to be replaced and the rotors were warped and needed to be trued. Since that work was completed, when I apply the brakes the first thing in the morning or when it is wet, the car will slow down and then suddenly lock up. This throws me forward and I get a jolt from the seat belt. The dealer has been unable to duplicate it and tells me the brakes are mechanically fine. Sometimes when this occurs I hear a loud clunking sound from the rear of the car. The last time I took it to the dealership they told me the Prius has an issue with the brakes rusting, but they are mechanically fine. I still have my doubts.
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My car has 140K miles and has never required any brake work.
It is difficult to describe, at freeway speeds they seem to work fine. Around town, say 45 mph and below, the brakes work as though I'm a 16 year old learning to drive for the first time. I'll press a little, and get nothing, press a little harder and they really grab and the car lurches. But it also seems inconsistent, it doesn't always happen.
This has had NO perceptible impact on the "grabby" braking performance. Further, I would describe the hydraulic only braking as "excellent", they work just fine and I do not get any of the pulsing or weird brake behavior when braking with the car in neutral.
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Occasionally (I cannot isolate a particular behavior or scenario), when I put the car into either drive or reverse from a cold start, remove the emergency brake (in either order), keep continued solid pressure on the brake pedal, the car will lurch a few inches. If I do not release brake quickly and re-apply, it will lurch again. This is very disconcerting. It happens on level ground. It is particularly alarming when parallel parked or in a parking lot when people are around. I am taking the car in to the dealer tomorrow for the 5K checkup and will mention it.
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2005 Gen2 with 216k miles
Driving on highway and accelerated to pass a vehicle, sudden slow down and all warning/error lights went on. Pulled to side of road and used Autel 539 to get codes P0A78 + P0A90. Scan code reader does NOT display the INF codes, so I can not get them.
Turned off vehicle and restarted. Put into drive and it appeared that I could move forward (and reverse) and was apparently running strictly on the ICE - no power coming from the DC motor for assist. HV battery would charge as driving down road.
It was slow moving, but as long as I was accelerating (very sluggish!) was able to move forward. If I took foot off gas pedal then ICE stopped running and would not restart when pressing on gas pedal.
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Just 2 months old car with 1100 miles on it suddenly chokes, vibrates profoundly when it slows down from high speed and turns the check engine malfunction light on ...
Dealer checks and finds following codes P0171(too lean), P0441 Purge & P0455 Gross leak ...
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I've read around the forums stating the P Lock error is common from a low battery causing the vehicle not to start.
The strange thing is that my vehicle DOES start and the message appears and the dash shows READY and I am able to enter gear and drive. If I hit a button on the console the message goes away and if I'm driving at higher speeds the message does not return but the large triangle stays. The error message only reappears when I slow down to 3 mph.
The error does flash back on the screen when I slow down to stop or sit at a light. The car does not shut off during this it just flashes the message and shows the large triangle.
My battery test shows 12.3v on no load and 11.6 on a load. I would hate to replace my battery and have the issue not be resolved.
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I have a 1962 ford falcon ranchero. The driver side brake light, goes out when brake pressure is applied, but is on when lights are fully on, but even then brake pressure is applied and goes out. Right brake light is fine. And turn signal on right works. But driver side back light goes out when brake pressure is put on and when turn signal is put for left side. Right makes a turn noise left side doesn't. I recently replaced the turn signal switch. So its brand new. But older wires every where else. No cuts anywhere on wires. Fine. And replaced the bulb also.
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So originally I was told it was my front brakes going bad, which was the case. To address the issue, I replaced the rotors and pads awhile back and the noise disappeared for a bit. Fast forward a month or so ago and I hear an on-and-off squeaking noise when the brakes are applied. It does not happen every time. Usually when I ease onto the brakes to a slow stop.
Figuring it could be my pads going bad for whatever reason, I decided to check my brake pads and rotors again. No odd signs of damage on the rotors and by the looks of it there was still plenty of pad left. I then sprayed some brake clean assuming it could be dust but there wasn't much.
I have not touched the drums yet but I'm thinking it could possibly be the drums or a bad bearing? The car is a 2012 with 38k miles which is the reason I'm doubtful of it being a bad wheel bearing. What could it be?
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Our 2015 Prius 4 with 8,900 miles just suddenly stopped chirping and turning the lights off upon locking. The courtesy lights also no longer work (the lights worked last night as I approached the car but not tonight. The locking chirp/beep worked 3 hours ago but not now. Also headlights no longer go out after double clicking lock on either of the 2 fob.)
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Earlier this year I did a very hard stop to avoid an accident. The stop caused the brake lights to be locked on, such was the force I applied in my 2011 car. Toyota replace the brake light switch, but since then there has been an intermittent issue that has been impossible to invoke and continues despite the brake booster having been replaced (after I made a fuss and complained to Toyota HQ).
It most often happened after I'd been driving then left the car parked for 10 minutes to an hour with the power off. I'd get in the car, depress the brake pedal and press the power button. When I did so, the brakes would become rock hard and, if the car was put into drive, would roll forward. The only way to stop the car would be to take my foot off the brakes and re-apply them.
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I first heard this on Car Talk on National Public Radio (sundays at 10, on the west coast). I heard the question but not the answer. Wife favored slow and hubby fast.
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On Monday, I was driving my 03 Ford Taurus. I had my cruise set at 57mph, all the sudden I started slowing down. I pushed the gas to the floor to try speeding up, but I kept slowing down. The car never shut off. I still had all of the electronics and the motor was still running, had my power steering as well. I pulled over and shut the car off. I started it back up and continued down the road and it happened again. Same thing, slowed down and pressing the gas and no speed. This happened 5 times within 65 miles. I got to my destination and was there for about 15 minutes, when I made the return trip. On my way home, I didn't experience this issue at all. What the cause may be?
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This morning I was driving my 2000 Ford Taurus to work at about 45mph when it suddenly starts to slow down as I was pressing on the gas pedal. I pumped the gas pedal as it was slowing but still nothing. I pulled to the side of the road just as it was coming to a stop. I turned the car on (everything seemed fine) and all the lights came on and the engine started. I was in park with the car on and pressed the gas but the engine didn't rev. I turned the car on twice over the next twenty minutes or so as I waited for the tow truck.
About a half hour into this ordeal I turned the car on again and tried pressing the gas and this time the engine revved so I put the car in drive and drove it around the block. I eventually canceled the tow and drove the car home and to school (about six miles total or so, at speeds under 45mph). I recently filled up the tank and had car problems last week (the car now has a new battery and alternator) but up until this morning there was no issue. What it could be? The shop said it would be hard to diagnose unless they could recreate the issue...
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My Camry XLS have pulsation when brake pedal is applied. The pulsation get increased with the speed and very noticeable at 60 -70 mph.
Is it front or rear break issue ? If you think rotors has to be re-surfacesd should I also change pads ?
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My girlfriends 2013 Hyundai Accent is having some problems. Yesterday, the Check Engine Light came on, but went out on its own maybe 15 minutes later. She did not feel that the car was running any differently.
This morning, after the car being parked through the night with the parking brake applied (she usually does not apply the parking brake), she observed that it still felt like the brake was applied when she tried reversing out. I told her to pull and release the brake a few times, but she said it was no luck.
What this might be?
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So I was told I had a brake light out? Went and bought new bulb and replaced. Turn on headlights and the single filament lights. so when brakes are applied the second filament should light up that give the brighter affect.
Well when brakes applied the bulb goes out completely? Take foot off brake and the single filament comes back on. The other tail light operates as it should. Even used bulb from working tail light with same results.
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I just put new disc and pads on my girlfriend 2007 elentra and all four little screws broke off the hold the disc so you can work on it but they aren't important apparently.
Heres the problem now the pedal jumps like i have super warped discs on the car doesn't shake or vibrate while driving but then i brake the pedal jumps up and down.
I figured it might have a stuck caliper pin, which I did so I cleaned and lubed them and I have the same problem?
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I have a 2015 Nissan Sentra. After running over a few pot holes my car has been making a clicking noise when I brake. What it could be?
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I have a really weird problem with my car. Every time that I apply the brakes, I get a bit of a shudder. It just started a couple of weeks ago and we checked the brake pads which were fine and the bearings were good as well. What could be causing this problem?
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Super annoying problem I can't solve.
Front brakes have a constant chirping sound that goes away when brakes are applied.
New front brakes were installed in November, OEM rotors and pads.
They were quiet as a mouse, until i installed a new set of struts and springs along with 10mm front spacers.
(Yes I am using extended lug bolts).
I took the fronts apart this weekend and lubed the hell out of them, still squeaking.
My next thought is to use some of that CRC disc brake quiet red goo stuff, but I'd rather not use that if i don't have to.
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I have a 2005 Rav4 Sport. I've been taking it to the same mechanic for years and have never had a problem. After my last visit (65K tune-up and new brakes), the car squealed when applying brakes driving forward or in reverse. The mechanic took it back, changed brakes and there was a small improvement. They next took it to Toyota who changed brakes and rotors and there was a bigger improvement. Now the squeal only happens when reversing out of a parking space while turning the wheel. It is back at the mechanics. They said they've taken it apart and can't find anything that would cause the problem.
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