P0401 DTC Code on Eng Start-up - Mercedes-Benz Forum
 
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#1 (permalink) Old 08-07-2011, 06:31 AM
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Date registered: Jul 2011
Vehicle: 2002 C320 Estate Wagon, 2003 230SLK, 2005 Sprinter Van
Location: Waxahachie, TX
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P0401 DTC Code on Eng Start-up

2002 C320 Wagon. 70,000mi

I am throwing a P0446 code on engine startup. This is the fuel evaporative control circuit.

The fuel cap is good, and is sealing well.

Happens almost every time engine is started (following reset of the Check Engine Light w a scan tool).

It will NOT appear again if erased after Eng start until shutdown and restart. I suspect thats because the evaporate sys is only checked on startup, but I thought I'd add that anyway.

Is this common with a typical cause on these cars?

Thanks,
Bob

Last edited by bobinyelm; 08-07-2011 at 07:59 AM.
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