Prius (2004-09) :: Loss Of Braking While Going Over Bumps?
Nov 13, 2011
Yesterday I was driving the prius when I came to stop for a red light there was a man hole cover that was sunken into the ground fairly deep and when the prius went over it while I was braking I lost braking power for maybe .5 of a second and the traction control light kicked on. This has happened a few times but this time was the worst, is this normal for an 06 prius or should I get it checked out? This NEVER happened in florida we just moved to chattanooga (roads are terrible) the car is also not enjoyable to drive here there are too many tight corners/bumpy roads I'm really thinking about selling it for a larger car that can handle the roads here better. My gti also never does this going over the same bumps/manhole covers.
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I did F&R brakes (Adam's rotors and hawk & akebono ceramic pads) on my B6 4mo about a month ago. Ever since changing the brakes, there is a clunking noise, when going over bumps, coming from the right side, possible right front. The sound consistently goes away when I press on the brakes. It's a metal on metal clunk that you can feel and hear. Not terribly loud, but pretty annoying. What could be the cause?
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Let's say I accelerate hard and hit some potholes and/or bumps in the road. this causes wheel spin/loss of traction. could anything be damaged if i keep accelerating past all the bumps while the traction control keeps trying to stop the wheels from spinning freely? I am talking about throttle to the floor in 2nd gear over bumps/small potholes
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My dad recently backed into my front right side. There was very little exterior damage but it still had a dent. I took out the dent and checked under for any visible damage and didn't see any. Over the past 3 months something has developed a little worse. It started as a small little crunch on the right side when going over speed bumps. Now on turning left hard or stuff like that and I hear it crunch. Its worse with more weight. It sounded like plastic but there's no loose plastic or anything. It's 05 Prius with 150k and I don't think there were any replaced shocks done. I bought it used.
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A clunk sound coming from the front end. Drivers side and Passenger side. Not really a metal on metal sound. The problem started after coilover install. The sound occurs while braking and accelerating over bumps. So what I've replaced:
-Strut Mounts and Bearings
-Lower control arm bushings (R32 bushings)
-Drivers Side CV axle
What I've checked:
-Tie rod ends have no play
-Ball joints have no play.
-I have no sway bar, so not the sway bar bushings.
-Its not the axle hitting the frame.
Could possibly be the dog bone mount but when I installed the 1' motor mounts I saw no issue but could possibly be the bushing. feel the clunk in my foot as well.
MK4 2000 Jetta 2.0 5speed With Raceland Ultimo Coilovers (Junk)
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2009 Prius bottomed out last week and twisted up the bracket that runs the exhaust system in the center of the car. Tore one side totally out of the frame. Consequently, exhaust now bumps and rattles on said bracket. I removed the bracket this morning to get a look.
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My suspension has been creaking even when I get in the car. I'm not even that heavy (about 150 lbs). The ride feels the same as it has before, but I also notice squeaking when going over bumps. This mainly happens in the rear shocks. How to fix it?
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I had the front struts replaced. I looked at the strut diagram and replaced most of the parts associated with the front struts. The rear shocks were also replaced. New brakes were installed on the front and rear. The front rotors were replaced. Mileage 124000 miles.
I thought this would might solve the squeaking when I went over a speed bump in the parking lot. It did not. How to fix the squeaking.
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Having brake pads making noise while driving on war zone like roads? Sounds like the front end is falling off. It started after a front brake job. Dealer then replaced all the clips and it was fine for six months. Now starting to make noise again.
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I'm pretty sure I know what the problem is since when I hit the brakes it stops. When I took the left side tire off and right side I compared and there is a thin metal sheet that has room to move on the right, but is tight on the left. When the brakes were done before maybe it didn't seat correctly or something. Just wondering what that plate is called so I can order one and change it. Driven that way 2 years, but it bugs me when the window is down and people probably think my car is falling apart. Maybe I'll search for a brake diagram.
Edit: I think they might be called "anti squeal shims". I saw a picture of them, so maybe they didn't put enough high temp grease, but the left side is tight and the rights side you can move a couple milometers side to side so I'm sure that's the jingling noise.
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When I'm driving over sharp bumps I hear what sounds like a small chain jingling around. I took off the hubcaps and jacked up the car to see if anything loose. I grabbed the exhaust pipe and shook it, but it didn't make any noise. I couldn't see anything that would cause it. The front right strut's rubber cover is off so could the strut make that noise?
I just read a few posts with similar problems, but one was a compression sound and another was a knock, and another was a metallic hick up. Mine is literally like a loose high pitch chain noise and change rattling in your pocket. No uniformity to the sound. But it also only happens over quick small bumps not large ones like speed bumps.
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Experienced an almost unsafe loss of stopping power when backing up after a cold start? Every morning when I back down the driveway in reverse, by about the third pump of my brakes the pedal effort increases, the pedal becomes very hard (like when you pump the pedal when the car is off) and I have a hard time bringing the car to a stop to put it in drive. I need to take it in to have this looked at...
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Driving 30 mph, oil light came on, immediate loss of power braking and steering. Engine did not stop, oil light disappeared yet still had loss of power steering and brakes. Still in D. Policeman had to stand on brake pedal to get into Park so that engine could be turned off. Towed to dealer in next state and dealer said cannot replicate so cannot fix.
Car is 2012 Santa Fe w/ less than 6,000 miles on it.
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My '07 shakes when braking below 7 mph. Coming to a complete stop is never perfectly smooth unless medium to hard braking is required. My thought was that the MG2 is in creep mode even while my foot is lightly on the brake pedal, causing the jerking, but creep works properly while not braking.
The shaking is very steady, at about 6 Hz, the same frequency as the "popping" noise one hears when stopped at the light with the foot lightly on the brake; just enough to keep the car from creeping, but not mashed far enough to turn off the creep current from the battery. I take it there's two sensors on the pedal as well as a potentiometer. Could the problem be mitigated if the creep current were cut off at the presence of a foot rather than having to press harder? There is no shaking on a harder stop, only the slow ones.
Another thought I had was that the pressure pump itself is supplying the brake pressure to the friction pads, causing the pulsing. In a previous thread, we discussed why my pump was coming on so often. Perhaps a leak in the canister causing the pressure not to be buffered, and the pump itself providing the pressure.
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I bought my Prius 9 weeks ago with 201k miles. It now has 214k on the odometer... that's right, 13,000 miles in just over 2 months. I love it. It's been problem free so far until last week when someone pulled out in front of me. I had to brake hard and when I did i got the red triangle exclamation point. No words, just the symbol.
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(2007 model)
For a slight re-cap, first time I had to hit the brakes suddenly, the front 12V plug went out. Alright, thought that was a bit odd, but continuing on.
Second time was a few years later, earlier this summer actually. Had to hit the brakes fairly hard to avoid hitting an idiot dashing across lanes. Entire MFD, radio, cig plug, the whole front works went out. Got online and after a bit of searching found a post saying to check the ACC-B fuse. Sure enough that was it.
So now we're at the third time. Same thing, sudden braking, ACC-B fuse blew. Replaced it, started up the car, blew again. Replaced it, started up the car, blew again. so now I'm at 3 25A fuses that have blown in the past 2 hours, 2 of them within 60 seconds of the car turning on.
One thing I did think was kind of interesting is when I turned the car on, I could hear various noises which sounded like electrical components doing a startup sequence, then it blows. The only thing I have in that front area is a tiny 12V camera, nothing else plugged in at all.
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I'm just wondering while under regenerative braking, is the car braking with only the front two wheels? And four wheel braking starts when the friction brakes engage? Or does the rear drum brakes always engage even though the front is braking through the electric motor?
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Quick back story, bought the car a year ago, seller told me it was in an accident and the radiator was replaced. He let me know that the discharge AC hose was missing and that the other hose was disconnected. I also noticed that the low pressure cap is missing. I recently ordered and installed the discharge hose with the intention of filling the system later.
I have always noticed a noise/vibration coming from the passenger side when braking at low speeds. I havent noticed at higher speeds but maybe there is more road noise. The best I can describe the noise is that is sounds like a compressor running. I have a hunch it's the AC compressor and might be related to the regenerative braking, but I am no expert.
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I have a 2005 prius. Got it 7 months ago. I hear brakes squeal when braking. I think I may need new pads. Are they easy to replace?
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Ever since I took my 18" wheels off for the winter and put the stock VW 16's with snow tires I have on multiple occasions almost rear ended the car in front of me when I experienced what seemed like a loss of brake pressure. The brake pedal did not feel spongy or anything but often in this situation the abs brakes seem to kick in for no reason. I feel a slight pulsation in the brake pedal which I can only assume is an activation of abs. I'm wondering if this slight pulsation (1 second duration ) is causing my brakes to be less effective. The pavement has been completely dry and I was not traveling fast enough, nor pressing the brakes hard enough to cause the tires to lock and trip the abs.
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I recently bought a 2004 Prius with 104,000 miles on it. When I try to go up into the mountains I only get a few miles or up to 1,000 to 2,000 ft. elevation (from 300 ft. starting) and the battery level gradually drops from 6 bars to 1 bar. The red triangle light and check engine light comes on and the car speed gradually begins to drop even if I continue to press on the gas pedal. I have only gotten down to about 35 MPH from 60-65 mph before stopping and turning around. Within a few miles of turning around the light goes off and the battery goes back up to 6 bars and works good going down hill. The dealer I bought the car from has been working with me to figure out the problem but so far we have not figured it out. He has replaced the main battery as well as the inverter/converter. The mechanic was with me on a test drive to the mountains and had his car computer plugged in while we drove and experienced the same thing. It gave the code for the catalytic converter so we changed the entire CC/muffler (one long piece) and still got the same code. The battery indicator on this car has never shown more than 6 bars. I'm not a Prius mechanic but I personally think it has a bad "Gas Engine" or something wrong with the gas engine. How do I tell if the gas engine is bad or has a problem?
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