Evaporative System Fresh Air Filter

[Wulf]

Just brought my Warlock in for her first oil change, so proud (and no I didn't take pictures). Have a question, stemming from the instructions in the user manual. Anyone know what the Evaporative System Fresh Air Filter is, and where it is located? It says to check it, and replace as necessary. From "fresh air filter" I would have thought a cabin filter, but with the other part, it makes me think it is the system used to prevent gas and other fumes from escaping the vehicle and potentially causing pollution. There is less than 5k miles on the clock, so there is no need to replace it yet, but finding out before I need to change it down the road would be a good idea.

Thanks in advance for guidance on tracking down this item.

 

[seabrook]

its in your air box get rid of it

 

[hemihustlin]

its in your air box get rid of it

oh thats what they call that garbage I found in there

 

[seabrook]

oh thats what they call that garbage I found in there

lol yes

 

[Tach_tech]

That’s not the filter they are talking about.

The evap fresh air filter is in the driver rear wheel well, it’s just behind the fuel filler door.

 

[seabrook]

That’s not the filter they are talking about.

The evap fresh air filter is in the driver rear wheel well, it’s just behind the fuel filler door.

oh whoops lol thanks for keeping me straight!

 

[GTyankee]

Evaporative System Fresh Air Filter

The Evaporative System Integrity Module, also known as an Evaporative System Integrity Monitor or ESIM, is a key component of the EVAP System on many late model Chrysler, Dodge, Jeep, RAM Trucks, and Fiat vehicles. Unlike previous Leak Detection System, the ESIM does not contain a solenoid. Instead, the ESIM uses two weights, a diaphragm, and a switch to detect pressure differences across a variety of conditions.



At the rear of your gas tank, there is a charcoal cannister, usually close by the cannister is the ESIM

As long as you don't make a habit of over filling your fuel tank, Topping Off
Gas should never reach the inside of the charcoal canister to break down the charcoal, which would send a signal to the ESIM, which in turn sends a signal up to the Purge Valve that is located close to the Throttle Body

That is when your EVIC lights up like Xmas tree

 

[El Gallo]

That’s not the filter they are talking about.

The evap fresh air filter is in the driver rear wheel well, it’s just behind the fuel filler door.

This post is many years old but I searched for quite a bit on finding a diagram or picture of how it’s oriented before getting lucky and finding this answer. Mine was hanging with no trace of a strap and I was a bit confused as to how to orient it. I actually logged in for the first time since 2020 just to respond to this. Thanks!!!!!

 

[ItsJeffie]

Evaporative System Fresh Air Filter

The Evaporative System Integrity Module, also known as an Evaporative System Integrity Monitor or ESIM, is a key component of the EVAP System on many late model Chrysler, Dodge, Jeep, RAM Trucks, and Fiat vehicles. Unlike previous Leak Detection System, the ESIM does not contain a solenoid. Instead, the ESIM uses two weights, a diaphragm, and a switch to detect pressure differences across a variety of conditions.

View attachment 475445

At the rear of your gas tank, there is a charcoal cannister, usually close by the cannister is the ESIM

As long as you don't make a habit of over filling your fuel tank, Topping Off
Gas should never reach the inside of the charcoal canister to break down the charcoal, which would send a signal to the ESIM, which in turn sends a signal up to the Purge Valve that is located close to the Throttle Body

That is when your EVIC lights up like Xmas tree

Thanks for this info, I had no idea. I’m 71, and old NIASE tech (now ASE). These new vehicles can be very interesting.