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This happened on my daughters 2017 1.4L Renegade and after about a month of blocking off the port on the intake side as well as blocking the port on the airbox so that no contaminants got in to the system, she started getting the check engine light. Read the codes and it showed code P1CEA, which had to do with the EVAP system and "integrity of the hoses/tube between the throttle body/intake and the fuel tank". So my thinking was that the broken nipple and blocking off of the ports had something to do with it. After calling salvage yards all over the country to try and get my hands on a used one in good condition and having no luck, we found a Jeep parts distributor that had a new airbox for $183, $203 with shipping. We put the new airbox on today (the new airbox even came with a new air filter, which helped a little bit with the sting of the cost) and after a few miles, the code is gone. Now that I have the airbox completely off and can look in to where the restrictor is that creates the venturi effect, I feel confident that I can trim the piece down on the airbox and put a hose nipple back in place; then use a rubber hose instead of the hard plastic hose.

My advice to any new 1.4L Renegade owner is to immediately replace that hard plastic hose with a rubber rose, being careful to route the hose so that it stays clear of any parts of the engine that get hot. That way, if you access the air filter and move the lid out of the way enough to get at the air filter, the hose will simply flex instead of breaking this poorly designed piece of plastic. A piece that probably costs $10 to make but $200 for an owner to replace.
 
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