2002 Volvo S40 Starting/ Running Issues

Ok first I would get the car scanned and find out why the engine light is on and have it turned off too. Make sure to get the code so you can find out what it is. As for the fuel pump making noise this is not good it is probable going out. The battery is probable just weak so the cold weather showed its weakness I would probable replace it. Hope this helps and thanks

Hello - you may have a series of problems. I would start with the simple and work my way on. A corroded battery cable will certainly cause many issues. With the computers in the cars today the electrical system must be working at its best. Fuel pumps can have many issues with just a couple volts off. Anyway, I would first replace if badly corroded or clean the battery cables. The best way to clean is with Arm and Hammer baking soda and water. Take a cup of water, pour in a couple of table spoons of the baking soda and dip the cables into the solution after you have cleaned off the bulk with a wire brush. DO NOT let that solution get into the battery. This dilutes battery acid. Don't be afraid to gently rub the ends of the cables in the solution with a small brush. It will turn green and be nasty. Wear goggles and gloves. Don't get any on the paint or clothes. It will discolor and eat through things. Once you are done with the Arm and Hammer, put the box in the refrigerator to let it soak up any odors in there. Then you know where it is for next time! Clean the battery terminals really good. They have battery brushes for that. Once all is replaced or very clean and dry, ensure the battery has a really good charge on it. You can then take the car up to Auto Zone or O'Reilly's and for free they will bring a machine out to the car and check out the battery, starter and alternator. Usually the first cold snap kills a weak battery. Thus the being cooler also was a factor. While you are there, Auto Zone, I think O'Reilly's will also, but AZ for free will pull your codes. You must find out what codes are in there. That will lead to the next step of repairing those items. Then from there if it is not running correctly provide us with some more info. It may be say, the fuel pump, a relay or other things but first we need to get a good battery, alternator combo going to check the other. Also, once you fix the items shown by the codes, they can also clear all codes to start fresh. From that point on though, anytime you get a light, stop by and get the codes pulled for free. Good luck, be safe and let us know if this doesn't work.

Ok great the battery is now good. Now did you clean the battery term. Ends at all? The guy is right wait a week or so and go back and see if any codes come back. As for running it not heard of that but have heard that running the engine at 2000 rpm for about 2 minutes in park or neutral to allow the computer to relearn the peramiters. As for holding the gas pedal to keep it running this could a few different things. As far as taking it to the dealer or a good foriegn repair shop this depends on how you feel you can diagnos the problem and what tools you have. First you will need a volt meter (battery opperated one). If you just don't feel comfortable enough with working on it to this extent then a good shop is the answer from here.