Codes P0440, P0441, and P0446

2002 CHEVROLET PRIZM

213,000 MILES • 1.8L • 4 CYL • 2WD • AUTOMATIC

THEMAILMAN

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Hello. I checked the codes on the car yesterday just to see if anything new popped up. It's had a couple that I've been trying to address for a bit. Three new Eval codes showed up as pending. P0440, P0441, and P0446. I kind of sort of over-filled the tank the day before yesterday. Could overfilling the tank have caused those codes to set, or should I start chasing?

Jun 10, 2022 at 4:05 AM

SQM

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Hello,

The EVAP codes can get triggered due to any leak within the system. That is primarily what those code that you have.

Here is a helpful guide:

https://www.2carpros.com/articles/evap-system-code-repair

The best course of action would be to take a look at the possibilities and find the issue.
I have attached the troubleshooting guide for the codes P0440, P0441 and P0446 below.
Follow those steps, as it can help you determine the problem.

Let me know of any questions.
Thank you.

Images (Click to enlarge)

Jun 10, 2022 at 8:51 AM