Problem with code PO442 (no it's not my gas cap I have replaced this) Guys at local auto part store told me to take it to the dealership (YIKES all I heard was a cash register ringing out)

Asked by Jan 18, 2015 at 01:08 PM about the 2005 Pontiac G6 GT

Question type: Maintenance & Repair

(no it's not my gas cap I have replaced this)  Guys at local auto part store told me to take it to the dealership (YIKES all I heard was a cash register ringing out)
Also, has anyone else had (panoramic) sun roof whistle? IF so is this something that ONLY the dealership can address?

3 Answers

60,755

The trouble code P0442 is a small leak in the EVAP system. The EVAP system pulls gasoline fumes from the gas tank into the engine to be burned instead of being released into the air. You need a smoke test to find this leak. The leak can be SO small that it can't be seen with the naked eye. The shop will force (harmless) smoke into the system and look at the EVAP system lines. When they see the smoke coming out they'll be able to find and repair the leak. HTH. -Jim

10,580

believe it or not, there is actually a website www.po442.com just for this problem because it is so common. lots of info there.

2 out of 2 people think this is helpful.

Thank you, I will look into it

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