P0442
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Cargo Master
Joined: Oct 2012
Posts: 2,333
Likes: 35
From: South Carolina
P0442
My 2009 F250 5.4 was throwing code P0442 - minor EVAP control system leak.
The first time it happened, the guy at the parts store checked it out, reset it, and said if it comes back, try replacing the gas cap.
The second time it happened, same thing.
I bought a Stant cap at my local parts shop, and had them reset it again. I don't like the Stant cap since it does not fit the retainer correctly, but it sealed fine.
However, the same code came back.
It took a smoke test to identify a leak from the vent tube on top of the fuel tank. The tube was replaced today.
If the code stays gone for a few hundred miles, I'm going to switch back to the original gas cap. I want to make sure the leak is gone before I change anything.
Thought I would share this with y'all in case anyone else has a similar issue.
The first time it happened, the guy at the parts store checked it out, reset it, and said if it comes back, try replacing the gas cap.
The second time it happened, same thing.
I bought a Stant cap at my local parts shop, and had them reset it again. I don't like the Stant cap since it does not fit the retainer correctly, but it sealed fine.
However, the same code came back.
It took a smoke test to identify a leak from the vent tube on top of the fuel tank. The tube was replaced today.
If the code stays gone for a few hundred miles, I'm going to switch back to the original gas cap. I want to make sure the leak is gone before I change anything.
Thought I would share this with y'all in case anyone else has a similar issue.
New User
Joined: Oct 2014
Posts: 1
Likes: 0
OK... got an 04 Sport Trac with 4.0
August 2010 It was a Saturday and I put on the CAI I drove down the highway about 10 miles and check engine light comes on. Code checker tells me it's P0442.
Truck NEVER had this come up when it was using the stock AI.
Checked all connections that were made and all clamps for tightness and everythings looks good.
Replaced gas cap twice (2nd one was a $25 OEM)
I clear the code from time to time and it comes back after about 50-75 miles.
I am guessing from previous posts I may have to pay someone to do a smoke leak test?
It just seems funny that it came on right after the CAI was installed.
August 2010 It was a Saturday and I put on the CAI I drove down the highway about 10 miles and check engine light comes on. Code checker tells me it's P0442.
Truck NEVER had this come up when it was using the stock AI.
Checked all connections that were made and all clamps for tightness and everythings looks good.
Replaced gas cap twice (2nd one was a $25 OEM)
I clear the code from time to time and it comes back after about 50-75 miles.
I am guessing from previous posts I may have to pay someone to do a smoke leak test?
It just seems funny that it came on right after the CAI was installed.
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