If you have a large leak then this means the emissions system that is a closed system has something either leaking externally or the purge is leaking into the engine.
How did he check the purge? It would be the most likely cause if there is no external leak.
As for the fuel mileage, it is unlikely that this code is causing the poor fuel economy but it is possible. So we should get that repaired first and go from there.
I attached the testing that we need to do in order to figure this out.
Once we have that code figured out then we can check fuel mileage again.
Lastly if you are taking this to a mechanic and they cannot figure out how to fix a large leak code, I would recommend another mechanic. These are pretty simple to figure out as long as you understand the system and know what you are looking for. Let me know if you have questions. Thanks
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Saturday, September 26th, 2020 AT 10:28 AM
