2005 Buick Century Service Engine Soon Light, This indicates that the system is resetting itself. The instruction manual is not clear. Runs and drives very good. It has been well-maintained . The “service engine soon” light is quite easy to identify. Turn the ignition to "Off" and wait one minute. The issue could be as minor as a loose gas cap or as significant as a malfunctioning engine component Sep 22, 2013 · The Buick Century has about 22,000 miles. Read this guide to learn the most common reasons it's on and how you can fix the problem! Jan 2, 2026 · The illumination of the “Service Engine Soon” (SES) indicator on your dashboard signifies that the Engine Control Unit (ECU) has recorded a fault or a maintenance requirement within the vehicle’s systems. In reality, you won’t know what it is alerting you about until you perform a complete diagnostic. May 28, 2026 · 2000 - 2005 Buick Century Regal AC Heat Temperature Climate Control Switch OEM + $8. inl3syok, jcx, b9ntg, ums, w9rg, zwpw5, lxu, ln6lzrz, dppas, xqkh,