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Re: want pass emissions without po431 or po442 getting...
You can't. These are codes related to the o2 sensor and the evap circuit, and will be checked every time. You can try clearing the codes, but I suspect they will come right back. Time for a repair.
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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 evap emission control system leak (small) 1 of the lines for emissions is leaking. po455 is-- emission control system leak (large). turn off light with code scanner after it is fixed.
If you have an EVAP leak, you will get the following codes:
1. P0442 evap emission control system leak (small). 2. P0455 evap emission control system leak (large).
If these codes come up, you need to trace the leak. The most common place for the systems to leak besides the gas cap is at the service port under the hood, the hoses at the purge solenoid, and the hoses around the fuel tank. Check all your EVAP hoses from under the hood , all the way back to the gas tank. You can repair a split hose easily. Buy some 14.5mm EVAP hose at the auto parts store. Just cut the split or cracked section out and attach the new hose. I can only say that u must fix the code issue and light to pass state emission test, if u reset the light they will know, the system will tell the tester that the system is not ready, this will cause a fail.
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.
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