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99 OBW throwing a PO 440 code

Rooster2
in 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX

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Just came from an auto parts store that pulled my CEL code. Result came back PO 440 code. This seems to return weeks after I fix something. I have replaced the gas cap, and fuel fill pipe going to the gas tank. Any suggestions of what else I should investigate to fix and clear the code.

 

Thanks,

Larry (rooster2)

  • Author

Well, maybe I fixed the CEL code. I swapped gas caps with my wife's 98 OBW, and CEL light turned off. Even a relatively new gas cap may not seal that well.

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