Question about 1999 Buick Century
You can buy a diagnostic computer for your car but try this first
with car off, turn key on (but not starting car) in this succession.
on - off - on - off - on then leave the key in the on position (again, without starting), and it "may" begin to blink the engine dash lights in a series (example): flash, flash (pause), flash, flash, flash, (this would be 23 ...and so on. Your owners manual should tell you what the codes mean. If not an auto parts store probably could.
Hope this helps and saves you some money.
Posted on Oct 15, 2010
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Posted on Jan 02, 2017
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Please see my tip at http://www.fixya.com/cars/r5932051-check_engine_light_check. These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.
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