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2002 mercedes ml500: GAS CAP..engine run..run ok..town 13 mpg

 

Customer Question

2002 mercedes ml 500, 97000 miles error code P0446 INSTALL GAS CAP reset system code come on ever 1hr engine run ok ,it need new plugs, fuel miles in town 13 mpg

 

Optional Information:
2002 Mercedes-Benz ml 500 v8

Already Tried:
change gas cap check line to fuel tank

Submitted: 1513 days and 22 hours ago.
Category: Mercedes
Value: $30
Status: CLOSED

Accepted Answer

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Expert:  Kevin replied 1513 days and 22 hours ago.

P0446 relates to a fuel tank shutoff valve not a purge system leak. Test for voltage at the valve. It is most likely time to replace the charcoal shut off valve.

 

Kevin

Expert TypeMaster Mercedes Technicain
Category: Mercedes
Pos. Feedback: 100.0 %
Accepts: 48
Answered: 2/18/2009

Experience: 4 years experience, Mercedes Benz Master Certified

Ask this Expert a Question >
Customer replied 1513 days and 22 hours ago.

is the charcoal shut off valve in the right hand side?

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Expert:  Kevin replied 1513 days and 21 hours ago.

On that model I believe it is hidden by the frame above the spare tire. I will check when I arrive at work tomorrow and verifiy in the morning.

 

Kevin

Picture
Expert:  Kevin replied 1513 days and 8 hours ago.

I was correct. The shut off valve is above the spare tire in the rear of the vehicle. Good Luck!

Kevin

 
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