Question about 2002 Volvo S80

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Check Engine Light one - brake booster and evaporative system leak

2002 Volvo S80 2.9 1. Check engine light came back with an "evaporative system leak" and a recommendation that I replace the "Purge Valve". Where is the purge valve located? Is it easy access for me to remove without a lift? How do I replace it? How long can I drive the car before replacing? 2. The other check engine code came back as something to do with the "brake booster" and I need to replace the "Brake Travel Sensor". I have the same questions for this item. Thank you very much for any help!

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: engine management light volvo s40 problem

The best thing is to go to your local Volvo maintenance shop or Volvo experts to find out whats the problem..usually the coomon ones I think is the programs inside its ECU unit..you try this..ask the volvo experts to reset the ECU and lets see..if problem arise then it is no doubt you might need the sensor..hope this help..

Posted on Nov 03, 2008

  • 184 Answers

SOURCE: Check engine light on and Troubleshooting code is P0116

Hi, I managed to find a graphic illustration of the ECT sensor.
02c7b2a.gif

Good luck!

Posted on Dec 15, 2008

  • 3600 Answers

SOURCE: Volvo S-60 03, non turbo B5244S, has had check

Replace the cat you have ran it for years with a bad 02 sensor so now replace it and you will get better performance and better gas miliage. Never run a check engine light fo a long time it's telling you something is wrong. youer lucky you did not destroy the engine.

Posted on Jul 16, 2009

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SOURCE: I have a P0455 Evap code and so far 3 visits to

Check the charcoal canister

Posted on Feb 26, 2010

  • 1 Answer

SOURCE: pcv valve location

volvo s80 y reg 2.4 runs ok little bit lumpy tickoover when warm but very loud whistling noise take dipstick it stops but very big suction from tube not pressure it is not breather box under manifold

Posted on Mar 12, 2010

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My 2003 jaguar s stype v8 started to shake from the engine while parked and stopped at a red light and my check engine light starts blinking and restricted performance light comes on


run the fault codes to look for injector problems
check injectors for bad tips
check fuel pressure to injectors
check for vacuum leaks with the foot on the brake ( booster leaks --check by applying the hand brake with the foot off the brake and if the problem is not there it is the brake booster faulty)

Sep 23, 2015 | Jaguar Cars & Trucks

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I replaced the master cylinder and brake pads and my brakes still dont work on my 1998 chrysler sebring


Have you tested your brake booster and your calipers?Your brake booster doesn't make any noise, and it doesn't use any electricity or gasoline, but it ensures that you can stop your car with only a light touch of the brake pedal. Things weren't always like that: before the invention of the vacuum brake booster, cars still stopped. It's just that you had to really stomp on the brake pedal. The modern brake booster is an ingenious device that operates using something that your engine generates whenever it's running: vacuum. The brake booster takes engine vacuum via a rubber hose that runs from the intake manifold, and the brake booster uses that vacuum to amplify the pressure you put on the pedal. A light application of the brakes is translated by the brake booster into significantly more pressure on the brake master cylinder, ensuring that your car stops quickly. So what happens to the brake booster if your car stalls, resulting in a loss of engine vacuum? Early designers realized that gas engines were hardly foolproof, so they designed a little check valve into the brake booster circuit. The brake booster stores enough vacuum to provide full boost for two or three pedal applications even after the engine dies. The check valve on the brake booster is what keeps that vacuum from leaking out. And speaking of leaks, that's the reason most brake booster units have to be replaced. As your brake booster ages, the rubber seals and diaphragms that hold the vacuum tend to wear out and crack. If the brake booster can't hold vacuum (despite the check valve's best efforts), its time is up and you'll need a new or remanufactured new brake booster.

Jun 14, 2011 | 1999 Chrysler Sebring

5 Answers

Brake pedal is hard but brakes not very effective. booster holds vacuum. replaced booster check valve, no change. dash brake light stays on most of time but sometimes goes out for a while then comes back...


Check the brake fluid first.is it low or no brake fluid at all.is the brake fluid got dried up or leaked out. Sounds like the power brake booster is bad, that is what the master cylinder is bolted too. There is a rubber hose that has a plastic valve in it were it snaps into the booster, Pull that rubber hose out of the booster and off of the engine, Now the end that you took off the engine. You should be able to **** through the line, but not be able to blow through it. If you can then replace the valve, It is a one way valve.
If that is all right then hook hose back up to the engine and start engine, You should hear a major vacuum leak at the valve end, put you finger over the valve and it should stop making noise and engine should smooth out. If it don't the rubber hose must be leaking or the tube on the engine were the hose hooks to is stoped up.
Also check the master cylinder if power booster is replaced. If the brake light is coming and going check the brake light switch. check fig for the internal assembly parts:-- bdea807.gif

To check engine vacuum, connect a vacuum gauge to the supply hose that runs from the intake manifold to the booster. A low reading (below 16 inches) may indicate a hose leak or obstruction, a blockage in the exhaust system (plugged catalytic converter, crushed pipe, bad muffler, etc.), or a problem in the engine itself (manifold vacuum leak, bad valve, head gasket, etc.).
The condition of the diaphragm inside the booster is also important. If cracked, ruptured or leaking, it won't hold vacuum and can't provide much power assist. Leaks in the master cylinder can allow brake fluid to be siphoned into the booster, accelerating the demise of the diaphragm. So if there's brake fluid inside the vacuum hose, it's a good indication the master cylinder is leaking and needs to be rebuilt or replaced. Wetness around the back of the master cylinder would be another clue to this kind of problem.
To check the vacuum booster, pump the brake pedal with the engine off until you've bled off all the vacuum from the unit. Then hold the pedal down and start the engine. You should feel the pedal depress slightly as engine vacuum enters the booster and pulls on the diaphragm. No change? Then check the vacuum hose connection and engine vacuum. If okay, the problem is in the booster and the booster needs to be replaced.
Vacuum boosters also have an external one-way check valve at the hose inlet that closes when the engine is either shut off or stalls. This traps vacuum inside the booster so it can still provide one or two power assisted stops until the engine is restarted. The valve also helps maintain vacuum when intake vacuum is low (when the engine is under load or is running at wide open throttle). You can check the valve by removing it and trying to blow through it from both sides. It should pass air from the rear but not from the front.
Replacing a vacuum booster is a fairly straight forward job. All you have to do is disconnect it from the brake pedal on the inside and unbolt the master cylinder. The pushrod that runs from the booster into the back of the master cylinder must have the specified amount of play.
You will typically find the power brake booster mounted on the firewall attached to the master cylinder. The master cylinder is connected to the brake pedal.
Thanks. keep updated for any more query.you can rate this solution and show your appreciation.

Jul 15, 2010 | 1997 Ford F250 SuperCab

1 Answer

At times when brake is applied,engine dies and brake light comes on,and check engine soon light comes on. Engine will start right away,but service eng light stays on


It sounds as if the brake booster is leaking. When you press the brake pedal, vacuum is drawn from the engine supply, if the booster is leaking, it allows too much vacuum to leak, stalling motors & triggering sensors. There is a check valve located between the line that comes from the engine manifold over to the brake booster & that can also cause problems.

Plug that line & use your brakes, if it cures the problem, you've found your issue.

Other than that, if you have another vacuum leak, the use of the brakes could just make it so bad that it then triggers symptoms so you shold check your vacuum lines. Vacuum leaks can be identified by usiing a can of carb. cleaner with a nozzle, spraying a small amount in bursts near vacuum lines, connections, and plugged lines. If there is a leak, the engine will stall or slow when it draws in the carb cleaner and you should be able to identify where the leak is. Go slow, spray only a little at a time & allow it to dissipate as it is a flammable product.

good luck

Feb 15, 2010 | 2001 Nissan Sentra

1 Answer

Would a failing vacuum booster effect the brake lights?...It seems when the pressure builds back up they work. When it drops they go on for a second then go out.... ALSO would a failing booster cause a...


The booster uses vacumn to assist your foot pressure. A leaky seal or diaphragm in the booster or a bad hose from the engine to the booster will cause the pedal to drop as it loses power assist. I think the brake light switch is mounted under the dash by the brake pedal. Fix the booster now, it may save your life.

Feb 06, 2010 | 2002 Volvo S80

1 Answer

How to adjust power brake booster for 2002 volvo s 80


There is no adjustment to the rod between the brake rod and the booster on a S80. If you are having brake light problems the first place to look is in the trunk for a bad fuse in the rear electrical module behind the cover on the left side.

Oct 08, 2009 | 2002 Volvo S80

2 Answers

We've just had a big rain storm and I was out getting errands done when all of a sudden it was as if my power brakes were'nt working. It was very hard to push the brake pedal down, although I still had...


Sounds much like a vacuum leak; this would definitely cause rough running and the power brake booster is dependent on engine vacuum.
This should have turned on the 'check engine' light though -

Aug 19, 2009 | 2002 BMW 5 Series

1 Answer

No brakes


hi
First your car want to check brake system.
1-check your bads and disck , or drums.
2-check your brake pipes and leak
3- check the brake master cylinder
4- check brake booster or brake assistant, you can check aply the brake after start the engine your feet brake will go down if not this is not working it is makes leak so change the booster. remove the brake master cylinder after you can loose four bolts under the dush boad.

Nov 28, 2008 | 1991 Volvo 240

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