ChaseBaciles

Recently purchased 2001 s2000 has the cel code p0411. After heavy research, I understand it is due to secondary air injection system incorrect flow. Either leaks, cracks, kinks, backward white check valve, switched up hoses or cracked air pump.

Troubleshooting done. Checked hoses 5-6 times. No obvious cracks. Hoses are hooked up correctly. Found a sloughs crack to the hose under air pump. Repaired. Air pump in good shape, no cracks. Wiring all good, pump activates at start ups.

I am all out of idea here. Ecu has een reset. Code keeps coming. Back. What else am I missing. I also hear the slave open and close so I know that's working.

I've brought it in to a mechanic. He said that the valve could ve getting stuck sometimes and could maybe use cleaning. Any idea what he means and f I could do this myself. After all the reviews about this issue, it doesn't seem to be common the valve gets sticky. I know it's not a critical error but that damn cel light is bothering me.

turbo_slug

there's a control valve. it could have gone bad or your hoses are swapped around...

PM me if you need to buy a valve

ChaseBaciles

Thanks bro. Anyone have a pic of what this valve looks like. Possible to clean it? I looked at the hoses. Everythings tight. I've followed a few diagrams of the order. Unless you mean the wrong size hose has been used... Which I would be able to tell if it's wrong size or not.

Btw. Is the valve install if I go this route a diy?

turbo_slug

The valve looks kinda like an egr valve but s2k's don't have an egr valve

ChaseBaciles

thanks man, how much are you selling those valves?