This morning I was driving my girlfriend to work and the check engine light came on. Took it to the auto parts store to get it scanned and it gave me a code of P0440 Evaporative Emissions System. I texted ChaCha and asked them how to fix the problem. They answered back and said Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back. This should fix the problem. To me it seems like that fix wouldn‘t work but I was wondering if that‘s true? If not, how do I fix the problem?Btw, I have a 1996 Pontiac Sunfire SE 2.2L
Yes in my state they check emmissions every 2 years yes the gas cap can do this buy a new one.
P0440 is one of several evaporative emissions leak codes. A loose (or cross-threaded) gas cap is the most common cause, and certainly the cheapest thing to try first. It may take a couple of days for the code to clear by itself, so don't be in too much of a hurry to try something else.
that is the correct 1st step. next steps are diffuclt and expensive tune up check all fuel lines/vacuum lines replace fuel filter then pump
