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A check engine light can indicate a broad spectrum of problems with your 2004 Buick Century. In some cases you need to pull over immediately to prevent damage while in others you merely need to tighten you gas cap next time you stop in order to reset the service engine soon light. The video above shows how to locate the on board diagnostics (OBD) plug on your 2004 Century, how to read the trouble codes and how to reset or clear the check engine light using a scanner on your Century.
Intermittent Check Engine Light: If the check engine light on your 2004 Century is intermittent, try to take note of the conditions when this happens. For example, does it happen when you accelerating, driving on the highway or does it appear at low speeds? This will help your mechanic evaluate the issue. Steady Check Engine Light: If your check engine light is on every time you operate your Century, you need to have it checked as soon as possible, especially if you notice performance problems or unusual noises. Flashing Check Engine Light: If your check engine light is flashing, stop driving your Century and have it towed to your nearest mechanic - you probably have a very serious problem with your car and you risk ruining your engine by driving it. If you are unsure about what your diagnostic trouble codes mean; have your Century diagnosed by a professional automotive technician.
Harsh downshifts? Slipping gears? You might be low on transmission fluid2004 Buick Century Custom 3.1L V6
Flushing the coolant in your car is not that hard and will extend the life of your engine tremendously - learn how here!2004 Buick Century Custom 3.1L V6
If your car is leaking a small amount of power steering fluid - see this video on how to fix the leak2004 Buick Century Custom 3.1L V6
Small bulbs that burn out regularly - did you know you can replace these with LED lights?2004 Buick Century Custom 3.1L V6
There's no reason to check the washer fluid level without adding some - see how to do it here!2004 Buick Century Custom 3.1L V6
On many cars, the high beam bulb runs at reduced power during the day - check 'em and change 'em!2004 Buick Century Custom 3.1L V6