P0442 engine code - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 10-10-2012
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P0442 engine code

hey guys my 01 4.0 xlt is throwing the code p0442 emissions code anyone got any ideas on what it mite me causing it?
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Old 10-13-2012
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Its a EVAP leak. Could be anywhere in the EVAP system. Gas cap is the easiest if your really lucky. Best thing to do is have a shop smoke the EVAP system for the leak. Look for mouse damage they chew holes in the hoses sometimes. Look at the wires on the EVAP vent valve at the charcoal canister, if they are chewed off the pcm cannot close it and it will be a leak. Rust holes in the fuel filler tube are common also. If you dont find a visual cause smoke is the best way to find it.
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Old 10-13-2012
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ok thanks man i was looking for tips to where to start looking and you just gave me some
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Old 10-17-2012
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OBD-II Trouble Code: P0442 Evaporative Emission Control System Leak Detected (small leak)

CausesA code P0442 most likely means one or more of the following has happened:

•A loose or improperly affixed gas cap
•A non-conforming gas cap (i.e. not factory/original brand)
•A small leak/hole in a fuel vapor hose/tube
•Other small leak in EVAP system
•Faulty vent o-ring seal
Possible SolutionsWith a P0442, the most common repair is to:

•Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
•Otherwise, replace the gas cap, or
•Inspect the EVAP system for cuts/holes in tubes/hoses


Most likely your gas cap seal is dry rotted or flattened....cheap fix to just buy a new one.
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Old 08-14-2013
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My 01 Edge 3.0 has this code, It showed up shortly after I installed a new fuel pump. I did this install by dropping the tank. To do this, I had to remove all the lines, lower and then drag the tank out from under the truck.
When I went to reinstall the tank, I was basically lying on the ground and reaching up and around the tank to reconnect all the lines by feel. I am going reseat the line that goes back to the EVAP system, clear the code and see if it comes back. I'm pretty sure my filler line and cap are OK. If the code comes back I will have to go have the smoke test done. Anyone know how much that costs?
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Old 08-14-2013
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One of the most common codes i see at work, probably the most common. Fixes have been covered above.
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Old 08-15-2013
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got it fixed had it smoke tested and the filler neck was leaking like a siv went got a new one all better. thanks for all the advice guys.
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