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po442 is a small leak detected in the evap system, look for any broken or disconnected hoses, or a leaking gas cap, that is about as far as your going to be able to get at home with out a ton of special tools
evap system leak small most of the time this code comes from forgetting or properly replace their gas cap--others are gas cap not sealing replace cap-or a small leak in the fuel vapor lines -check cap and reset code if comes back check seal arund cap repair or replace if damaged -if good inspect the fuel lines and hoses for small cracks or damage repair or replace if necessary
The code PO442 is a small leak somewhere in the evaporative emissions control system, the best way to find that is to take to a shop that does smoke tests for emissions.
As far as the nozzle, try changing the position of it the next time you get gas.
po442 is an evaporative fuel leak it could be any thing from a loose gas cap to a stuck purge conrtol solinoid valve or canister close valve, best thing to do in this case is take it to the dealer for an exact diag ,
okay po442 isevap leak check gas cap amd right front tower in engine check evap line for broken hose,po131 bad o2 sensor top sensor on rear exhaust manifold,po420 is bad catalyic converter but could be o2 sensor.i would replace o2 first reset eng lingt and go from there, hope this helps good luck.
Replacing the EGR valve, its actuator, or your DPFE sensor could all be at fault. I would probably start with the valve itself since it's an EGR leak code. Your gas cap was a wasted repair. The gas cap would cause a P0441 or 445 evap code, but not an EGR code.
The computer that read the code for you can also reset it. If you don't have one, you can go to your local auto parts store and have them reset it for you. This is what your code means P0442 Evaporative Emission Control System Leak Detected (small leak). This is what Causes it and possible fixes:
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
PO442 is an Evaporation Emission leak. It's probably a loose gas cap.
The fix would be $96.00 at our dealership, since your truck is out of
warranty. You may be able to get it fixed cheaper, but you'll be
charged a diagnostic fee.