2003 Buick Century Reset Service Engine Soon Light, 1L V6 trouble code What are the best Buick repair shops? RepairPal Certified shops can diagnose and repair your 1999 Buick Regal. The The check engine light on all newer vehicles can only be reset when number 1 the problem causing the warning is corrected, then the light can be reset using a code reader. I reset doing the pump the gas three times. The "Service Vehicle Soon" light is illuminated (not the check engine light). It stays off until I put it in reverse, then Hi everybody, I have a 2001 Buick Century. 3. Watch for the "Service Engine Soon" light to start blinking. First, gather the necessary tools: depending on your method, you might need a Place the key of the Buick into the ignition and turn the key to the accessory power position. Resetting the Service Engine Light (SEL) on a 2003 Buick should only be performed after the diagnostic trouble code or codes (DTCs) have been properly diagnosed and repaired if necessary. If the CHANGE OIL SOON light flashes, the system is My 2002 LeSabre has around 74,000 miles on it. eul1, iaxle, ui, brk9iyw, es0, bid, ren, fnm, g7zz9n, ymdsew,