Are you experiencing a p0446 trouble code on your car? Don’t worry, I’m here to help you fix it. Last week, while driving, the check engine light came on in my vehicle. Upon using a computer scanner, I discovered the p0446 trouble code along with an evaporative emissions system vent control circuit issue.
The first thing to inspect when encountering this trouble code is the gas cap. Check for any visual damage, tears, or cracks on the gas cap o-ring. Also, ensure it securely locks back on the filler neck. In my case, the gas cap appeared fine, so I cleaned the filler neck and o-ring, and then applied some teflon lubricant to the o-ring before re-installing the gas cap.
After driving for about 15 miles, the check engine light turned off, indicating that the issue was resolved. If your problem persists, the next step is to check the functionality of the evap system, which prevents gasoline vapors from escaping into the atmosphere. The evap system is typically located underneath the vehicle, near the fuel tank or by the muffler.
On specific vehicles, such as the one I was working on, the evap system is positioned near the muffler. A faulty evap system often indicates a stuck open purge control valve or damaged vacuum hoses, resulting in rough idling and hard starting.
I hope these tips help you resolve your p0446 trouble code. If you found this information useful, please consider sharing this post with anyone who might need it. And remember, proper maintenance of your vehicle’s evap system can prevent potential issues in the future.
Thank you for reading and have a great day!