[2004MBS430]

I recently had a CEL that when the code was pulled said p0410 which is a secondary air injection issue. I have searched all of the forums and could not find anything specific to the w220 so i was wondering if you guys could provide some insight. The issue is i have to have emissions performed on my car and if this issue is not resolved it won't pass. I dug a little deeper and found the fuse f31 which is a 40amp fuse was blown (Now i cannot find any information on f31 and have no idea what it goes to, any thoughts as i have checked the fuse chart and cannot find anything on it to indicate what it powers). I replaced the fuse last night and this morning after my drive i checked and sure enough it was blown again. If this is a fuse for the secondary air pump the relay might be bad but i am unsure what to do to get to the bottom of the issue. I need your help

 

[mmcneil]

I recently had a CEL that when the code was pulled said p0410 which is a secondary air injection issue. I have searched all of the forums and could not find anything specific to the w220 so i was wondering if you guys could provide some insight. The issue is i have to have emissions performed on my car and if this issue is not resolved it won't pass. I dug a little deeper and found the fuse f31 which is a 40amp fuse was blown (Now i cannot find any information on f31 and have no idea what it goes to, any thoughts as i have checked the fuse chart and cannot find anything on it to indicate what it powers). I replaced the fuse last night and this morning after my drive i checked and sure enough it was blown again. If this is a fuse for the secondary air pump the relay might be bad but i am unsure what to do to get to the bottom of the issue. I need your help

I'm having a similar issue where my CEL is on due to p0410. There is a fuse, f31, for the pump and there's also a relay located in the passenger side fuse box under the hood. The relay is in position N, just behind the Airmatic relay. You may want to check and see if that relay needs to be replaced in addition to replacing the 40amp f31 fuse.

McNeil

 

[2004MBS430]

I know this problem can be a pain to chase down, i started another thread http://www.benzworld.org/forums/w220-s-class/1617460-can-bad-relay-cause-fuse-blow.html which has much more information.