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#1
10-30-2005, 04:00 PM
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2000 S500 P0410 Secondary Air Injection Malfunction
On my 2000 S500, I've cleared and had reappear after some driving a "P0410" code for Secondary Air Injection Malfunction. What would be the most likely cause of this on this model? Thanks.
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#2
10-31-2005, 08:26 AM
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There are at least 5 different things that can cause that code on that model!
First thing, in the morning do you hear the AIR injection pump come on? should sound like a vacuum cleaner for a minute or so. There is a vacuum switch-over valve that has to open 2 diverter valves & then inject air behind the exhaust valves. AT that point the O2 sensors MUST react to oxygen by dropping their output to less 40mv & stay there. MANY scanners can ACTIVATE that system for that test!
__________________
MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
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