danjak26
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- Nov 23, 2025
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- Buick Ownership
- 2002 Buick Lesabre
Hello all, I am looking for some help with my 02 Lesabre with ~90,400 miles. Around 5-6k miles ago it threw a P0446 engine code. I have replaced the fuel cap with a GM genuine one, and replaced the Vent Valve as well with a gm genuine part and it still persists. Occasionally I get a slight fuel’y smell when it’s warm and it runs really rough when starting the engine when its hot for a couple seconds, but not every single time. It makes a burping/farting noise a couple seconds after startup near the fuel tank but not at the cap. Hoping someone can help me out with figuring out a possible fix with this issue.
