The check engine light on the 1998 Buick Park Avenue can be reset by disconnecting the battery for a few minutes and then reconnecting it. The check engine light is only going to stay off if the problem that created the light is fixed.
You should have the codes read to see whats wrong.
try checking your gas cap it may need replacing
A bad switch, or a short in the wiring. This behavior in only one brake light would indicate the latter. Good luck
Need to know what code(s) were set and which O2 sensor you changed in order to help you.
Low coolant? Bad sensor?
What causes the dashboard light to stay on after your car has been turned off? 1994 Buick Century.
gotta problem somewhere get 'er scanned
what causes the rear lights to stay on while engine is running. the car is park
ALTERNATOR OR THE BATTERY GROUND WIRE Have you tried checking your Alternator? I know this is why mine on my vehicle would not stay charged..
There is a switch called the "twilight sentinel". That alllows you to adjust the time that the lights will stay on after you turn the engine off. Check to see if that is working properly.
Probably a short-circuit. Your question is not specific.