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1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Code PO440

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Old 06-03-2004, 01:32 PM
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Default Code PO440
EVAP emission system malfunction is the description. I took the gas cap off and put it back on and cleared the code and the SES hasent come back on, Problem Solved?

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Old 06-03-2004, 01:57 PM
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