Question about 1999 Oldsmobile Alero

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Code PO440 EMC SYSTEM MALFUNCTION what do i look for? on 1999 olds 3.4

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  • dbjr25 Dec 17, 2009

    2001 olds alero code po440 , replaced fuel cap & canister purge valve solenoid. Whats next.



    Jim

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  • Oldsmobile Master
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CODE PO440 FUEL FILLER CAP IS LOOSE OR CROSS THREAD.CHARCOAL CANISTER IS LOADED WITH FUEL AND MOISTURE.PURGE VALVE VAPOR LINE CLOGGED DAMAGE OR DISCONNECTED.FUEL TANK PRESSURE SENSOR IS DAMAGED DISCONNECTRD OR FAILED.PURGE OR VENT SOLENOID POWER CIRCUIT IS OPEN CHECK THE FUSE.FUEL TANK FUEL FILLER NECK OR FUEL SENDING UNIT O RING IS LEAKING.THIS IS A LIST OF POSSIBLE CAUSE FOR YOUR PROBLEM.

Posted on Sep 24, 2009

  • jmgonz48 Aug 29, 2010

    it would add extra value to your response if you could state location where to find most of these items on the car engine bay or what they look like. not all home mechanics know the ins and out or new terminology on modern parts.

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6ya6ya
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Posted on Jan 02, 2017

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