2002 buick lesabre check engine light on. need a

PWR WDO - 30amp circuit breaker , DRV -MDL 10amp fuse - both are located in the rear fuse box .
Fuse Block Rear
Under the left side of the rear passenger compartment seat

Flashing check engine light means don't drive it. It can damage things. Get a code scanner from auto parts store, rent it buy it etc. run the scanner to see what it says

You have a misfire ,spark plug ,coil etc. .. the flashing check engine light is to warn you that the misfire is severe enough to damage the catalytic converter ! You need to take it to a repair right away ! A new catalytic converter can cost as much as $1,000 . The shop will check the code's in the PCM . this will tell them what cylinder is misfiring !

Hi,
Get the check engine light checked out. Some auto parts stores will check it for free - call first. Otherwise, you'll need a mechanic or the dealer.
GL,
Td

First sign of ignition switch failing

It could be anything, but fuel pressure is down on the list. Look for vacuum leaks, dislodged hoses, cracked hoses....much more common for problems there.BUT take the car and have the error codes pulled. Something is amock and the codes are clues. Not answers or the culprit necessarily, clues...

Need to take to an auto parts store so they can tell you the code that tells why the engine light is on.

bring it to autozone to have the chk engine light diagnosed...its free...once you get the code, post it on fixya

Sounds like you just need to replace the one or two 02 sensors on bank 1.If you have over 100,000 miles the 02 sensos are realy to be replaced just as spark plugs and air filteres. If you wait to long to replace them you take a chance of them not comming out and then when they do go bad you will need to replace the exhaust as well.Hope this helps and good luck.

Your vehicle’s computer system has self-testing capability. When the computer senses that there is a problem with one of the components or sensors it stores the correspondent trouble code(s) in its memory and lights up the "Check Engine" or "Service Engine Soon" light to tell you that there is a problem and you need to diagnosed and repaired it. The list of possible codes number in the hundreds. The code itself doesn't tell exactly what component is defective - it only indicates where to look, or what engine parameter is out of normal range. Even if you reset the light, if the underlying problem is not addressed it will come back on. If you want to reset the light don't disconnect the battery cable, find a buddy with a code reader.