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Old 10-12-2006, 09:00 PM   #1
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CEL - Error Code P0446

Last week, I had to replace the MAF on my 2000 2.7 Boxster with 34k on it. While driving to work today, the CEL lit. I had the code read at Autozone and it is P0446 - a malfunction exists in the electical circuit for the vent control in the evaporative emission control system.

Could there be a relationship between this problem and the MAF replacement? (The tech who replaced the MAF said that it had become "corrupted" and was causing the car to run too rich.)

Is it possible that this code could be generated by a damaged gas cap? The person who pulled the code suggested that could be the problem.

Based on my search of RennTech it appears that it could also be a problem with the purge valve.

Thanks for any assistance.

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Old 11-20-2006, 07:39 PM   #2
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Did you ever figure the problem out?

I am experiencing something similar with my Boxster.

Thanks!
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Old 11-20-2006, 09:03 PM   #3
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Yes

It was the evaporative control valve. I had it replaced and have not had a repetition of the problem.
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2000 Arctic Silver/Black, Hard Top, On Board Computer
PNP Rear Speakers, HAES 6-channel amp, Avic Z140BH,
Painted Bumperettes, 2004 (OEM) Top and Frame
Homelink transmitter integrated in dash with Targa switch
Carrera Gauge Cluster with silver gauge faces, heated seats, litronics, painted console
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Old 07-11-2011, 09:37 AM   #4
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I just got code P0446. What is involved in replacing this valve ? Is it a DIY job ?

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