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1999 ML320 Error Code p0410. Already replaced check value

 
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  • Answered by:eurotec
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Customer Question

1999 ML320 Error Code p0410. Already replaced check value and air pump. code is still present.

 

Optional Information:
Year: 1999
Make: Mercedes-Benz
Model: ML320
Engine: V6

Already Tried:
Replaced check value and air pump

Submitted: 1121 days and 19 hours ago.
Category: Mercedes
Value: $15
Status: CLOSED

Accepted Answer

Picture
Expert:  eurotec replied 1121 days and 7 hours ago.

HiCustomer you first need to determine if the air pump is coming on when the car is cold. A bad K40 relay can cause your problem. You next need to check your vacuum hoses to the system to insure they are all good. And make sure your shutoff valves are working and that your Y32 valve is working (not sure what you've already replaced). Finally you will need to monitor the reaction of the oxygen sensors when the system is activated with the scan tool. You may have restricted ports in the cylinder head or you may have a lazy oxygen sensor that doesn't react quickly enough to the additional air in the exhaust stream. I've attached a functional description of the system below.

Marty

Air Injection System Functional Description

Expert TypeMercedes Technician
Category: Mercedes
Pos. Feedback: 99.4 %
Accepts: 21200
Answered: 3/11/2010

Experience: Bosch Certified Master Tech. Over 35 years experience.

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