Help with codes P0410 P0174 P0400
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2002 Mercedes c320 3.2L
Help with codes P0410 P0174 P0400
Starting with the first. I have a 2002 Mercedes-Benz C320 Base 3.2L. I'm getting p0410 cel code. I've tested the secondary air pump directly and it works perfectly. But when I go to check the voltage at the 40amp fuse, nothing. There is no power at all when the car is off or on, cold or hot. I pulled the relay and checked it and it is functioning perfect on all terminals with 0.001 resistance. Am I missing something here? Why would there be zero power at the fuse? Shouldn't the fuse have a constant 12v and be wired in BEFORE the relay? I'm just about ready to pull out the entire fuse panel and rewire the secondary air pump. Has anyone had this problem before? Tomorrow I will pull the egr valve and tube for cleaning. Hopefully this gets me somewhere on the P0400 and P0174 codes. Does anyone have a diagram of all vacuum lines on this vehicle? I've traced and replaced a few lines, but I am very sure I have a vacuum leak somewhere that I don't see. I do not have access to a smoke machine. But would the cigar technique work? If so, where should I be pushing smoke in?
Any help is greatly appreciated! I'm not sure what other relevant information I should include. But whatever I am lacking, please let me know and I will immediately go out to my vehicle to get it.
Any help is greatly appreciated! I'm not sure what other relevant information I should include. But whatever I am lacking, please let me know and I will immediately go out to my vehicle to get it.
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