Trying to smog it but it says i have a small leak in the gas cap but i bought three gas caps for it and same thing.
Mar 30, 2023 at 9:44 AM
Code po456, slow evap leak in gas cap?
2012 CHRYSLER 200
JAYDIGGS559
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CARADIODOC
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P0456 - EVAP Leak Monitor Small Leak Detected
This fault code refers to the entire evaporative emissions system. The gas cap is just one part of that. There's the fuel tank, hoses, charcoal canister, purge valve, and a lot of other parts involved with this system. The first step is to do a quick visual inspection for things like dry-rotted hoses and rusty hose clamps, but usually small leaks can be very elusive. We use a smoke machine to inject a white, non-toxic smoke at 2 psi into the system, then we watch for where it sneaks out.
This article will explain it better than I can:
https://www.2carpros.com/articles/evap-system-code-repair
This fault code refers to the entire evaporative emissions system. The gas cap is just one part of that. There's the fuel tank, hoses, charcoal canister, purge valve, and a lot of other parts involved with this system. The first step is to do a quick visual inspection for things like dry-rotted hoses and rusty hose clamps, but usually small leaks can be very elusive. We use a smoke machine to inject a white, non-toxic smoke at 2 psi into the system, then we watch for where it sneaks out.
This article will explain it better than I can:
https://www.2carpros.com/articles/evap-system-code-repair
Mar 30, 2023 at 12:46 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.