Help with P0455 fault code.

[Samxboy1]

So I've replaced the purge valve, leak detection valve and the gas cap and still getting the P0455 dtc
What else could be causing this? Any ideas please

 

[Dark Knight 500]

Next step would be to replace the ESIM(Evaporative System Integrity Monitor) located on top of the charcoal canister


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[OCDTech]

Next step would be to replace the ESIM(Evaporative System Integrity Monitor) located on top of the charcoal canister


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Isn't that what the leak detection valve is? Or something different?

 

[Samxboy1]

Isn't that what the leak detection valve is? Or something different?

Yes I believe you're right. I've already replaced this. I'm now getting P0456 which is a small leak. There is a very faint smell of gas from the filler cap area, but it's a brand new Mopar cap. I've gone through every connection in the EVAP pipes. The truck is a 2015 with only 50000 miles. It does however sit for several weeks/months at a time in the hot florida climate so it's tough on rubber etc. I did hear there is a PCM update available that reduces the sensitivity of the system so reducing the likelihood of error codes occuring? Has anyone had that update done?

 

[56PW17]

I think this was the same code I had when my tank/ roll over valve was cracked. If you have a gas smell have you looked at the roll over valves?

I had a gas smell towards the rear of the cab