Mechanics

SECONDARY AIR SYSTEM

1999 Saturn SL2 • 4 cylinder FWD Automatic • 122,640 miles

What is a secondary air system, and what parts are involved. My check engine light has come on, and the #is po410
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Constantine66
May 21, 2011.



I'm sending a tip alngthat you can check. But you will have to have the code removed as you can't do it without a scan tool. This is the air pump that puts air into your exaust system. And this diescribes a possible blockage that you can clean out.


Hmac300
May 21, 2011.
Just to add to this one. With that code I would check the vacuum line that runs from the intake manifold over the valve cover to the air injection vacuum solenoid with the engine running remove the hose from the solenoid that goes back to the intake manifold see if you have good suction on that hose.I would also go to auto zone rent a hand vacuum pump and on top of your a/c compressor there is a combonation valve that has a hose coming off the solenoid to it. Remove that hose and hook the pump up to the nipple of the combonation valve pump it up too 20 inch pounds on the gauge and see if the valve holds vacuum.I have seen a lot of them not hold vacuum setting that code. If all that check's out you will have to see if the port on the manifold for air injection is clogged. Let me know what you find.


Saturntech9
May 22, 2011.
THANKS FOR THE INFO. I CHECKED THE VACUUM, GOOD. IT TURNED OUT THE HOSES NEEDED TO BE REPLACED THAT ARE ON THAT BELLOWS/SOLENIOD ASSY BECAUSE THEY COULD NOT HOLD VACUUM. THE SOLENIOD HELD VACUUM, BUT WHEN I APPLY VACUUM ON THE BELLOWS IS THAT NOT SUPPOSED TO OPEN? BECAUSE IT IS NOT.I CLEANED OUT THE CLOGGED STAINLESS STEEL TUBE ATTACHED TO THE MANIFOLD.I PUT VOLTAGE TO THE PUMP AS WELL AS THE SOLENIOD AND THEY WORKED. I MIGHT TRY TO CHANGE THE BELLOWS NEXT.


Tiny
Constantine66
May 30, 2011.
The only two thing's on top of the a/c compressor that have vacuum hose's going to them are the solenoid and the combo nation valve. Is the combo nation valve what your calling the bellows?Its the on that let's the air come from the air pump to the exhaust manifold. That's what I was telling you to rent a hand vacuum pump and see if it was holding vacuum. It's pretty common for them to fail and not hold vacuum and open up to let the air from the air pump go into the exhaust manifold. With vacuum applied it should open and stay open as long as vacuum is applied. If it doesn't it will set your code P0410 your getting. Let me know what you find.


Saturntech9
May 30, 2011.