P0442 Buick - LeSabre Just got code when starting up with 1/4 tank of fuel. What is the problem.

Question

I think i got this code in error.
Just replaced pc valve, and will be changing fuel filter next week

Answer 1

have you replace the gas cap? if not that is the first thing to replace

Buy an orginal buick gas cap, not aftermarket

https://www.autocodes.com/p0442_buick.html