Multiple engine misfire codes?

Hello, the P0456 is a small EVAP leak, this can be the canister purge valve, the vent valve, a leaking purge line, leaking charcoal canister, bad gas cap seal. Most likely it's the purge valve, because of the other codes p0302, p0304 are cylinder 2,3,4 misfires. P0300 is random misfire. You can try pinching off the purge line going to the intake, erase the codes and see if any come back. That's a quick check.

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

Clearly we have a misfire issue but we need to start with if there is any history with this. Did this just happen one day and you checked the codes and this is what was there?

The P03xx codes are all misfires for multi cylinder, cylinder 2,3, and 4. The P0456 is an EVAP issue.

Let's start with the misfires but again we need to know the lead up to when this happened. Was there a recent repair or anything else that may be related to this? Thanks

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

Here's the wiring diagrams for the purge valve and vent valve, this will aid in locating the correct solenoid (valve).

Okay, do you have any ability to monitor live data with that scan tool? I am hoping you can tell us what the o2 sensor data is telling us. We need to see if this is a rich or lean condition which will point us in the best direction for figuring out what is causing the misfire. I suspect the evap code is a separate issue but let's start with the basics.

If the exhaust is rich then the fuel is not burning which indicates a lack of spark. If it is lean it indicates a fuel issue.

Let me know this and we can keep going to next steps. Thanks

KASEKENNY1 and AL514 are some of our best! Glad you could get it fixed, that kind of problem can be tough. Please use 2CarPros anytime we are here to help.