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Had the fan assembly replaced in a 1999 XC V70 AWD Turbo Volvo. $920.00 later, I noticed an intermittent faint humming noise, and a noise like the fan was hitting on something in its way, after repair. About a week ago the check engine soon light came on, but nothing seemed different. The other day about 3 months later the humming noise came back and it became so loud that it was scary. I was out of town so drove it. When I reached a higher speed, the humming phased out or clunking or..., not completely, at reduced speed of 10-45 mph, the noise came back even louder. What could this be/ seems like it is coming from the front end. I didn't notice a change in the way it was driving, or maybe was too concerned with the noise. Whatcould this be ?
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Question edited for clarity.
Question moved to model category.
This is a strange code that doesn't appear to have one definitive reason, it's a bit of "you have a bit of a problem, but we aren't sure". Just Answer dot com mechanic says it is the MAF Sensor.
The ignition coils are 1 per cylinder. You need to remove the center timing cover and then the coil cover, there you will see the coils under the cover on each cylinder.
either the top bearings on the struts or the lower track control arms ,remember that when the front struts are changed the original beariings are put back on
the first thing you want to check is whether or not it has a heavy drag at the wheel caused by wrong pads, sticking caliper, improperly installed parts. Lift the car and try to turn the wheel. Just because they are certified does not mean they know everything. I'm certified too, but I also have experience with euros and the quality of parts that need to be used. If inferior quality parts are used it will cause this. It can create all kinds of problems and noises. Take it back until they get it right. Ask them what brand of parts they use. Let me know and if they give you any grief, contact me and I will advise accordingly.
If your car has the xenon headlights, it might be a faulty xenon ballast/regulator module. You car has daytime running lights so they are on at a low power setting all the time.
The fuel filter can be located under the carpeted cargo storage floor at the rear of the wagon. Remove the four 10mm bolts, remove the cover. You will then see a removeable plate to the right just behind the rear passenger seat. Fuel filter can be seen through hole in hole. Replaced from underneath wagon. Be sure to make sure lines are fully inserted onto filter. Check for leaks. No smoking, extinguisher handy. Note arrow on filter for correct fuel flow.
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