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ok i was driving my volvo xc90 out of know where the car slows down I go to press the brake it's super tight I go to press the gas i get nothing I noticed the brake failure light appears so I pull over turn off the car I try to start it several times and I get nothing I get out and notice antifreeze is leaking from somewhere but I couldn't really tell where from.Could the antifreeze leaking be the reason for the brake failure?
 

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ok i was driving my volvo xc90 out of know where the car slows down I go to press the brake it's super tight I go to press the gas i get nothing I noticed the brake failure light appears so I pull over turn off the car I try to start it several times and I get nothing I get out and notice antifreeze is leaking from somewhere but I couldn't really tell where from.Could the antifreeze leaking be the reason for the brake failure?
Welcome to Swedespeed, Corey.

What year is your XC90?

Read the OBD codes on the car and post them here.

Thanks.

George Dill
 

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To obtain OBD codes you would have to purchase a code reader and then plug it into your dash port. Try looking under the vehicle and locating the source of the leak. You may be able to do this with the hood open from above.

Post your findings and hopefully we can help you from there
 

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honestcash it was long trip?
 

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Hmm tight brakes, could be a lack of vacuum, making the brakes feel tight (not sure if lack of vacuum would cause the brake failure message to be triggered). The antifreeze (should be blue) leak may cause overheating (not necessarily indicated if coolant sensor is not wet) leading to engine seizure. Which seems confirmed by the lack of ability to start the car. I hope this in not your case. Start by locating where your coolant leak is. Then see if you can use a ratchet and large socket to turn the crank, you may need a cheater pipe, but it should nit be too difficult to turn. If you can turn the engine over then add water to the radiator and try to get the engine to start. If it starts then shut it down. Check to see if there is water in your oil. If no water in your oil and the coolant leak is small then top off the water and start the engine and try to go for a shot drive (no more than around the block). Does it have power is it making any weird noises? In none then fix your leak. If the leak is too big to make it around the block, then fix your water leak and then try to drive the car around the block. Does it have power is it making weird noises? If there is no power or weird noises then you may have dodged a bullet with the coolant leak. Now on to the brakes, if you were able to get it round the block, and the rotors are not HOT then flush the system and continue to drive. If they are HOT then you will need to figure out what is going on with them. Getting the codes read either buy purchasing a tool or by renting one from the auto parts store would not hurt and may help you figure out want is going on. Also here (Mattews Volvo Site) is a link on how to read DTCs. Hopefully someone here will be able to tell you what they are.
 

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i got the same thing tody... first message in dash was anti skid services required then brake failure stop carefully. its in liimp mode since i think its taking off in 4th gear.
NOW i know my pads are almost down to nothing and i got all the new brake parts in my car... would this cause this reading or is it something worse??
will a OBDII code reader work on this.
 

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well, it depends, if the brakes got hot. def. it will show that message, the only way to know is replace the parts and take the ground lead of the battery off for about 20 min. and Connect it again and see if the message still appears.

like i said in one thread, i got the same message after 7 hours trip, when i finally arrives at city and slow down, the message was on my car. I did drive my xc that night and the same thing. Next day nothing was on the screen again.
 

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put my code reader on my V70,, getting a P0600 code? and now in my message it says transmission requires service.. hmm, i just did a drain and fill last sunday when i changed out the left driveshaft...
 

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P0600 is a communications link failure.... There was a thread not too long ago where someone's ECU failed causing the comm problem and had spurious messages popping up on the dash. You may need to get DiCE and Vida hooked up to the car to see if VIDA can help find the cause.
 

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Brake Failure

Came to a red light and brake pedal was soft and had to press hard to stop. Anti skid service required message came on. Good thing I was going slow and no one in front of me. Brakes were changed a year ago and should have been ok. In for oil change two weeks ago and nothing noticed. Can I ever trust this car to be safe? 2004 T6 AWD.
 

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If your pedal was very stiff, that means your brake system is still working - you just lost the vacuum assist that helps power the brake pedal so it's easier to press. When the vacuum assist goes out, the brake pedal just becomes very very difficult to press, but if you stomp on it *HARD* you can still get it to stop your car. When I say *HARD*, I mean step on it like you're using the leg press at the gym. You need to use your lower back firmly planted in the seat and really step on it. That also means no sitting gansta style with the seat all the way back and low - you'll just slide up the seat when you need to step on the brake.

Some people don't remember that older cars didn't come with power brakes :(

If the brake pedal has no resistance at all and just drops to the floor - that's when you need to panic. Shift the transmission into neutral (you can do it while the car is moving) and gently press on the parking brake until the car starts to slow down and stop. Once you stop, change your pants, catch your breath, and get the car towed.

On the XC90 the vacuum pump located under the hood behind the driver's headlight (I think) has a tendency to fail or leak - causing the symptom that you're describing. You can get a rebuilt unit or get a new one installed - it's a few hundred dollars.

If you're unfamiliar with this - I suggest bringing it to a independent Volvo specialist - they will know how to swap it out.
 

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The Volvo shop I use can't work on it till 8/8/12. Will let y'all know if it the vacuum pump. Problem comes and goes so driving slow.
 

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past 10 days or so, I was noticing a significant brake lag ie no brake assist when starting the car and reversing it in the morning for about 2-3 mins with no further problems during the day.
Brakes would work but had to really stomp on them.

Took it to the dealer and everything checkout out ok except vacuum pump 31317445

Holy *** this was expensive to replace

It has been a little cooler in the morning here in SW FL (low 70's... so cold)

also:
http://www.matthewsvolvosite.com/forums/viewtopic.php?f=10&t=36569
 
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