Secondary Air Injection Incorrect Upstream Flow Detected.
Check to see if there are any broken or cracked hoses going to the intake manifold.
A faulty air pump / smog pump would cause this too.
. The engine has an A.I.R. pump that supplies the catalytic convert the oxygen that it needs to do it's job. DTC P0411 indicates the A.I.R. pump air flow is being restricted or the A.I.R. pump or diverter valve is not working. Since I can't tell you for sure exactly what the problem is, I can only give you a worst case scenario, A.I.R. pump replacement.
SOURCE: diagnostic code po411
The P0410 code refers to the emissions system.
The AIR pump puts air to the
exhaust to lower emissions. It takes in outside air and pumps it through two
one-way check valves into each bank of the exhaust.
About 90% of the time that this code is set, the one-way check valves have
worn out or failed and allow water (which occurs naturally in the exhaust) back
into the pump. In any cold climate, especially in climates with higher humidity,
this water may be more excessive. The water partially fills the AIR pump, it
can then freeze. When the PCM commands the pump on, if the pump is frozen it
cannot turn, thus overloading the circuit and "popping" the fuse.
In here you can find the Trouble Codes List:
The CODE mean P0411 Secondary Air Injection System Incorrect Flow Detected
Good luck!!!
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