Prius (2004-09) :: Changed Brake Fluid Now Have To Pump Pedal Sometimes To Stop?
Sep 10, 2010
2003 - I tried to change the brake fluid with a MityVac. I've done it to dozens of cars with no problem. With the Prius it didn't take it well as I have to pump the pedal sometimes to stop or the pedal goes way down. Only now I read about how a special Toyota scan tool is recommended to do it. Is there any other way? I only really did the front brakes since after trying one rear wheel cylinder and getting nothing out of it, I quit. The dealer wants $165 and I'm sure that doesn't include any extra shop fees and such they tack on. What other way can I try before taking it in?
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My 2007 Prius (151,000 miles) just started making what sounds like a scraping sound when in motion. This does not happen every time I drive it. The dealership said I need to replace the brake fluid actuator pump.
He couldn't really tell me what would happen if I don't have it fixed. He said perhaps the power brakes would go out, or maybe the anti-lock brake system. Either way, I don't want to mess with possible brake failure. But the cost of this repair is so high, and my car already has 151,000 miles. I'd love to drive it to 300,000 miles if I can, but am I being realistic? I'm wondering if it's worth investing this much money in a car with so many miles.
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I was going down the highway at 70mph and came up to a toll booth when the brake pedal went to the floor and the car wouldn't stop. I hit the pedal hard and the car stopped in a very jerky manner as if the abs was initiated. I looked at the dash and the ABS, (!), and brake lights were illuminated. I turned the car off and then on again and the lights were off and the brakes worked normally again.
The Toyota dealer in CT said the weak battery was causing an under-voltage at the stroke sensor and replaced the battery. They told me if I lost my brakes again (!) I should bring it back for a new stroke sensor. In hindsight, I should have just told them to go ahead and replace the sensor. Two days later, driving down Florida route 301 in the rain, a stoplight went from yellow to red in about 3 seconds so I hit the pedal hard. The back brakes immediately locked up, the front wheels kept rolling, the car swerved and slid through the red light intersection sideways.
I counter steered and slid between two cars at the other red light, on the wrong side of the road as I straightened out. The car swerved and slid sideways again in the other direction and then spun around so I finally wound up in the correct lane, and I drove off like nothing happened. I was doing maybe 35-40 at the time and it's a miracle no one got hurt. Again I look down and see the lights illuminated. I cycled the power switch as before, and again the problem went away.
About an hour later the problem came back and this time no amount of power cycling will clear it. Basically what I'm understanding now is that it's the regenerative side that doesn't work with the bad sensor. The hydraulics kick in at around the last 10% of the pedal so the car will still stop, but I have to floor the pedal and that makes the car think your trying to lock up the wheels so it initiates the ABS system which makes stopping jerky and unpredictable. BEWARE the stoke sensor!!! What a dangerous design!! The dealer has the car now...
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2005 with 110K miles. Had oil change about 2K miles ago, tires rotated about 1K miles ago. I was at a stop light when I felt a little movement in the brake pedal and the lights all came on. Brakes continued to work, but somewhat harder to push the pedal. When first applying the brakes, there was a very slight wandering of the car, which was easy to correct.
I drove the car home and turned it off. About an hour later I started it and the problem was gone. I took it to an independent garage the next day. Their scan tool found C1357 -- decrease pressure solenoid fault -- but could not go further into sub codes. They recommended that I take it to dealer.
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I am looking at purchasing a used 05 gx. It has about 109k on the odometer, a lengthy carfax report showing that the maintenance has been kept up since day 1. It's a one owner and is very clean. While borrowing the car for an afternoon I noticed two issues that is causing hesitation.
While stopped at a light I kept getting feedback in the brake pedal, like a light thump in a pattern of two at a time.
The second, and this might be normal? While examining the outside of the car with the engine running I heard a sound at the rear of the car by the rear wheel. It sounds similar to a compressor, maybe for the air ride suspension. I checked the height control in the car and it was set to "N".
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So I took the pads off and saw pistons that push caliper against rotor were to far out to install new pads. (rear pads were still intact, both front pads were out when i pumped) So im pumped the brakes thinking it would reset them and alls it did was push the fronts out more.. I noticed fluid leaked out of the pistons after fully pushing them out.
After seeing that pushing the pedal only pushed them out and didn't reset them, i pryed them in with a C wrench. Was quite difficult but managed to do it. Note I only did this on the front pads..
Rear was just fine, piston went back in easily. I filled brake fluid fully and still does it - Now pedal hits the floor when i first hit it and seems very light when braking.
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In my 2008 F150 with 108,000 miles, I am having a vibration in the brake pedal. When I am stopping or at a dead stop. I first thought it might be the rotors needing to be turned, but the vibration seems to go away when I turn off the a/c.
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I swapped my fluid and ever since I did that my clutch and brake pedal are pulsing/vibrating only when I start the car. It almost feels like ABS pulsing but on both pedals and the car is obviously stationary.
I followed the procedure from the manual and did all 4 corners and slave.
Brakes work fine/clutch is fine...
I must have done something to upset the BRAKE system?
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Hearing non-stop Pump sound ??
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I purchased a 2008 Prius with 117,000 miles lat month. I took it to a friend's house recently. When he was looking at the car, he told me that my coolant level is low and put some coolant in the reservoir. The next day when I was driving the car I was hearing a rattling sound every time I pressed on brakes. I could not figure out what could be the reason. The sound went away after couple of days. Today I was going through the manual and noticed the place where my friend put coolant in is actually brake fluid reservoir. It looks a lot like coolant reservoir of my other car. So now I am wondering what could happen if coolant goes into brake fluid reservoir. Will it harm my brakes? It has been about 2 weeks since that incident happened.
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i have a 04 f250 with the 5.4 gas motor, yesterday i changed the fuel pump in it, after we were done we started it up ran fine turned it off went to go start it again nothing, and yes i already checked the inertia switch under the passenger kick panel.
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I have a 2001 Grand Prix SE 3.1 that the brake pedal goes to the floor. I did notice the fluid was low , filled it up. I do not think it sucked air, although I can not be sure of that. As you can imagine, it is a beater so don't want to stick a ton of money in it. I had someone look at it that said he thought it was a "sensor" that would cost over 500 bucks. I don't know of any brake sensors at all. If there is, do they cost that much? If not would this be a master cylinder.
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80km on my accent, the brake pedal was getting softer and brake fluid was a bit low as normal due to brake pads were worn up over time. Brake pads were never changed. I thought changing the pads would change the softness of the brake pedal. I changed the brake pads, left and right, the brake fluid in the reservoir went up as normal but I drove around but the softness of the brake pedal did not change. I still had a little less than half size on the old pads. I need to press the pedal a bit much to feel the brakes. I am wondering maybe the brake pedal was always like that when I bought the car.
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My friend has a prius and had her brake pedal sawed off modification. Funny cause she says that her foot is always slipping off the brakes now. It was always a bogus fix, to fix nothing caused by errant drivers.
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I have a 2008 Prius. Had to do an 'emergency' stop. Put my foot on the brake pedal REAL hard and the car slowed way down, but not down enough. Munched the front end. Now remembering back, I didn't feel any 'chattering' from the ABS brakes. It seems like I got regen braking but never switched to the hydraulic brakes. Is that possible? Did I experience a braking failure? Or do Prius just take a lot longer to stop? I did a test stop in the rental car I have now (not a Prius or hybrid), and it gives me the ABS chatter as I would expect, with a short stopping distance.
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During the last week, or slightly less I suddenly started hearing the brake boost pump running much more frequently than normal in my 2008 and is also producing a "knocking" noise along with its run noise which increases in frequency as the pump speed increases. No problems with the engine coolant pump for the thermos, and the inverter pump was replaced yesterday along with a replaced "bolt" in the steering column for the recall.
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On our 2008 Prius, while the brake assist pump is running I get a steady thump-thump-thump-thump noise, as shown in the video below. If you put your foot on the brake the noise stops. The brakes operate fine and there are no warning lights on. What this might be? It's coming from the passenger side of the car, and oddly it's loudest under the car near the back seat. 86,000 miles on the car.
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Over the past week I have noticed leaking brake fluid and after my STOP Brake failure light came on I topped off the brake fluid and it is down to a low level again. I also notice that the clutch pedal (manual) does not return all the way when the brake fluid is low and I assume they share the same fluid. I'm going to take it to my mechanic but could this be a clutch problem or just a fluid leak.
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I have another small issue with my 2004 Prius. I just noticed yesterday that the second I very lightly depress the brake pedal, a little clicking sound is made down below. It sounds like it might be coming from the brake pedal itself or somewhere underneath the hood. It's only when I depress the pedal slightly and it makes pretty much the same sound when I release the pedal. I just had a 5000 mile service done to the car and there were no issues then.
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I can press on the brake pedal when car is off or on and there is a kind of quirky sound made. I can hear a pump sound and then a squeaking or quirky sound. It happens every time I press the pedal when it is stopped, either on or off.
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Long story, but I bought a 2007 Prius with 73K miles on it. Now I'm at 93K miles, and I think it may be more jerky than when I got it when I shift the tranny into "brake" mode.
I don't know if the fluid has ever been changed on it, and I intend to change it very soon now. Am I in a pickle? Or should this transmission be fine if the fluid hasn't been changed for 93K miles?
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