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My car tripped 4 codes but only got a description of two of them.
B2A51
B2215
P2181-cooling system performance
P0411-Secondary air injection, incorrect upstream flow

I replaced the coolant temp. sensor to see if it would fix the P2181 code.
Any idea about the other codes?
 

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P0411 is the air pump system. It may be a plugged purge valve, a broken plastic tube from the pump, a bad combi valve, a bad vacuum hose to the combi or even a bad O2 sensor. Start with the valve, make sure it is clicking. If not, try cleaning it. Then check the hoses.
 

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Under the passenger side headlight.
 
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