Q: Heard a loud bang when I turned on my car yesterday. 2007 Volvo XC90
heard a loud bang when I turned on my car yesterday. Turned it off and on and it didn't do it again. Has done this 2 times already. The car is driving okay and there are no warning lights but I'm concerned it could be something important.
My car has 137000 miles.
My car has an automatic transmission.
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Hi there - this is highly unusual behavior, and should be checked out immediately. Check for problem codes, even if the Check Engine light is not yet on. This is a misfire condition due to an over-rich condition, possibly due to ignition timing problems. I would recommend an engine inspection ](https://www.yourmechanic.com/services/engine-is-misfiring-inspection) by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.
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