E420 secondary air injection system
10-05-2013, 03:03 PM
#1
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E420 1997
E420 secondary air injection system
My car have the secondary air pump code (p0410) but the car is running ok, Im trying to Find the fuse, the relay and the air pump? Why the car is running ok if something is wrong with the air pump?
10-05-2013, 07:19 PM
#2
Out Of Control!!
The secondary air pump function is emissions related--in very general terms rich exhaust is pumped into you exhaust to heat up the cats--this is a cold start function, the pump does not function when the coolant temp exceeds a value, which I forgot.
You may notice a loss of mpg!!!
You may notice a loss of mpg!!!
