Question about 2000 Volvo S40

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2000 Volvo S40 1.9T problems

I have a 2000 Volvo S40 that is having a couple of problems. First the DSA light has been on for about a month. No check engine light though. It came on one day while I was driving on the highway (There had been no rain). The rear brake lights are sticking on while I drive and until a couple of days ago sometimes stuck on after i exited my car. Also, there is a lot of vibration while idling and when I use the A/C on auto/4/5 I can hear a loud humming sound. I bought it on memorial day and it is still under warranty for another couple of weeks. The Mass airflow sensor has been a problem. I was told by the dealer he put a used one in, but I was still having problems so he put a new one in. Any help/diagnoses would be greatly appreciated.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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shaggyrat
  • 1224 Answers

SOURCE: No mechanics in town to help

change your alternator out this is the first indicator of worn alternator or a bad replaced alternator
all warning lights means that alternator is not putting out power and vehicle will run ruff with low power since everything is controled by the power of the alternator
since your in alaska i recomend a new alternator not a replacement refurbished these dont tend to weery the weather very well up there and make sure when you order your alternator that you want to make sure its not a refurbish and that it can take the elements you might need a 16 volt alternator

Posted on May 16, 2008

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  • 31 Answers

SOURCE: Volvo S40 OBD II P0171 & P0237

for p0171 it could be a few things like intake/exhaust leak,air system,map/vaf sensor,fuel presure/pump,injector(s),ho2s(heated oxygen sensor.

Posted on Sep 19, 2008

emissionwiz
  • 78936 Answers

SOURCE: Mass Airflow Sensor 2005 Chevy Malibu. 2.2 ltr.4 cyl.

The MAF is in the flex hose that delivers air to the engine, it has a 5 or 6 wire connector going to it.

Posted on Nov 19, 2008

greg_margo
  • 1959 Answers

SOURCE: Sunroof leak

You could change the gasket surrounding the sunroof Others have tried to seal the worn out gasket with epoxy. Here's a page from the Volvo forum I found that should help. If you want to replace the gasket yourself, it's not a difficult process.

http://volvospeed.com/vs_forum/index.php?showtopic=43652

http://www.automedia.com/Sunroof_Rebuild/ccr20050101sr/1

Posted on Apr 17, 2009

bnachos
  • 38 Answers

SOURCE: Bmw E46 318i touring. fail code 171

171 check, fuel supply system short circuit to b+

Posted on Jul 11, 2009

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