bennybelmont

Hi all! So over last few months I have been trying to fix/get rid of the annoying P0410 error code. After research i have replaced the secondary air pump, relay, switch over solenoids and today after the error still coming back i have replaced all the vacuum lines which were a pain to access but do able. The secondary pump works just a bit loud due to the egr valves not opening and when i disconnected,the vacuum line that goes to the egr valves i noticed there isnt any vacuum.Humm! The old vac lines and components weren't in bad shape to be fair and couldn't see any visible damage. But least I know they are new. The car runs great pulls like a train just the P0410 error and check engine is annoying. I can code out the secondary air system but don't like being beat! Could there be anything else to check, one thing im thinking is maybe the new solenoids are faulty or pump etc? Can that happen?Thanks Alex

Benz0matic

Did you clear the code after the work was done?
https://obdcodelookup.com/dtc/p0410-mercedes-benz/

bennybelmont

HiYes I cleared them as to get the system "working" again as when the check engine light comes on it shuts down the secondary air pump and so assuming the associated components too. So I cleared the code to test the system again. I'm going to get another known working solenoid just to see whether or not the new one is faulty, probably unlikely but guess anythings possible!