![]() She said the check engine light has been on for years. I bought it off a lady who bought it brand new. I have a 1999 Buick Century with a 3.1 engine with 55,382 actual miles. By actively helping the moderators with this you ensure that the r/Cartalk community continues to be a worthwhile and knowledgeable resource for car repairs. Report posts and comments that fall outside the guidelines. If you do not take the time to include this basic information your post may be removed until it is revised. By making a good attempt to narrow down where and what may be causing the problem you save those trying to help many steps in diagnosing the problem.** Be sure to also include the year, make, model and engine size of you car in your title, along with your main issue.** For example "2003 Ford Crown Victoria 4.6L exhaust manifold bolts rusted off" would be an acceptable post title. Take pictures, crawl under the car, look under the hood. ![]() Attempt to investigate the repair issue on your own. Have as much information as you can about the issue before posting. If you still aren't sure about something you are about to post, please look at the links down below for other subreddits that might be better suited for your question, or message the moderators.* Most repairs have already been covered multiple times somewhere in great depth that will satisfy your needs. * Remember that posting here is not a substitute for using Google. Some examples of things that are NOT GENERALLY ALLOWED: links to articles or videos that are for profit, professional-level body work repairs, detailing or cleaning questions, aftermarket car stereo questions ( /r/CarAV), car reviews ( r/Cars), new & used vehicle recommendations, price comparisons for tires, stereos, exhaust, etc, and especially questions regarding cost of repairs or the legitimacy of a mechanic's quote. It will let you read and reset the codes. You can get a code reader from Amazon that works with 1996 and up vehicles for about $15. They will have a letter followed by four numbers, for example "P1234". You can have codes read at Auto Zone, Pep Boys, O'Reilly's, etc., for free in most states. Get OBD codes! If you have a Check Engine (CEL) or Service Engine (SEL) Soon light on, get the codes read and have them available if possible befoer posting. We're here to help you, but not to assist in negotiating with mechanics (this is business/life advice, not repair advice) or to tell you what car you should buy. Also respect those that take the time to answer questions and remember that many are professional mechanics, who normally get paid very well to diagnose automotive repairs. Treat those asking for help with respect, and answer without bias toward them, their situation, or their knowledge (or lack thereof) about the repair issues. Post disappeared? Read the following guidelines, and if you think it still is relevant, message the mods to free it from the spam filter. We look forward to helping everyone with their car repairs and questions, but please take the time to read this sidebar. If you are unsure about what your diagnostic trouble codes mean after finding the Century OBD port location and scanning the codes have your Century diagnosed by a professional automotive technician.R/Cartalk is the original Reddit auto repair community, with over 650,000 subscribers and growing. Flashing Check Engine Light: If your check engine light is flashing, stop driving your Century and have it towed to your nearest mechanic – a blinking check engine light means you probably have a very serious problem with your car and you risk ruining your engine by driving it. ![]() 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. 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. Is it OK to drive with a check engine light on? Intermittent Check Engine Light: If the check engine light on your 2000 Century is not steady, try to take note of the conditions when this happens. The video above shows how to locate the on board diagnostics OBD plug location on your 2000 Century, how to read the trouble codes and how to reset or clear the check engine light using a scanner on your Century. Whereas a steady check engine light may mean you merely need to tighten you gas cap next time you stop in order to reset the service engine soon light. ![]() If you have a flashing check engine light, turn off the engine immediately to prevent potential motor damage. A check engine light can indicate a broad spectrum of problems with your 2000 Buick Century. ![]()
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