03 Buick Lesabre won't start

Asked by GuruD2DHZ Sep 16, 2017 at 07:04 PM about the 2003 Buick LeSabre Custom Sedan FWD

Question type: Maintenance & Repair

My 03 Lesabre started running rough and check
engine light  started flashing it did that for 2 days
then it died and won't start back.. Any
suggestions? ?

2 Answers
22,300

Guru9FSV8 answered 6 years ago

Flashing CEL is very bad for your wallet. This means if driven that you will ruin your catalytic converter. Too much unburned fuel getting to the converter. Pull codes and go from there.

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Lucas1999 answered 6 years ago

In my case I have the engine light always on (sensors are fried) in my 2002 custom, but on humid days or after a rainy day I have a bad start up. Sputters a bit but takes 5 min or so to heat up and evaporate the left over condensation. More or less a distributor cap and cable problem that I’m too lazy to replace. Check your battery also, see if you alternator is fine and probably has something to do with your catalytic converter.

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