20 Most Recent 2005 Buick Century - Page 3 Questions & Answers

Did you change the cabin filter?There are professional sprays for that, if itis due to water & mold in the blower housingCheck that the drain is open

Do the hazard flashers do the same thing ?I would suspect the turn signal switch is the problem but it could be a short in one of the light sockets.

Have you changed the thermostat or have it check

There might be one with your battery under the rear seat. One more under the hood, and one near the dash either under a kick panel or side of dash

could be a fuel filter

It sounds to me like you might have some carbon left in the EGR exhaust passage which breaks loose at random and lodges in the EGR valve holding it open. Once the carbon moves through everything returns to normal. I would suggest removing the EGR valve, plugging the intake poassage, starting the engine and reving it a few times to blow out any remaining carbon. Reinstall the valve and see what happens. Otherwise you can visually check the passage for any remaining carbon.

Have your fuses checked and your battery connections your cables may be loose or something may just not be connected correctly

You have to fix the problem with the brakes before the light will go out.

You will need a code reader or scan tool to perform this task.

Can you please discribe exactly what it is doing. Do you have a Check engine light on in dash display?