Question about 1998 Chevrolet Malibu

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Turned car off at gas station want start back acts like missin

Acts like starvin for gas put on computer gives back codes po401,po404,po446,po452,po453

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  • grandpasteve May 11, 2010

    codes 401 and 404 are egr related check your egr valve 446 is evap malfunction 452 evap to low 453evap to high it is in your egr system these systems are all related to exhaust gas recirculation your fuel pump is probably been disabled

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  • Chevrolet Master
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All of these problem codes refer to EGR valve and emission controls. It may be, if egr was fixed, it would be ok!! take off EGR valve and clean carbon from egr hole in engine and from EGR valve. if egr valve is bad or plugged with carbon then the car will act like it is not getting fuel, it will bog down.

Posted on Sep 27, 2009

  • carl Aug 24, 2010

    p0401 and p0404 are similar,p0404 egr position sensor performance. this looks at the electrical side of egr. replacing egr should take care of this problem. p0446--
    The evap vent valve is the most likely cause. you could also have a plugged vapor canister. or a bad fuel pressure sensor, the vent valve is back by fuel tank. clear code when done. p0452--could be as simple as fuel cap not put on tight enough, or a stuck vent valve. if the cap is the problem it will clear after about 3 times driving, light will go off. p0453-- it is leaking emissions into air. it could be anywhere in emission system, or a bad fuel cap. good-luck!!

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