P0174 & P0411

[Funmart6]

As mentioned in my other thread "Coolant Leak" I have 2 codes that have shown up. What would y'all check first concerning these codes?

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[Funmart6]

Okay so the P0411 code concerning the SAI could be from a faulty relay for air pump, or the air pump itself, or a hole in the SAI hose. In the Axle Replacement thread I showed a picture of a mystery hose. It turned out that the mystery hose went to the SAI pump. That hose had fallen down and had rubbed on the axle creating a flat spot in the hose and I could see some exposed cords. I am going to have a look at that hose. I have heard the air pump working so, my first thought is that the hose has a hole in it at the flat spot I saw.
The other code could be caused by a vacuum leak. I can test for vacuum leaks with smoke and will do that soon also. I also want to replace the fuel filter as the car did sit for some time with a little gas in it and I think it would be a good idea to replace the fuel filter.

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