Problem with my 2001 Oldsmobile Aurora 3.5L.
I replaced secondary air injection pump with new GM part and 2 wire connector to fix a GM P0410 code check engine light is still on after being
cleared. Wondering if there is some fuse or wire that could be blown from the air injection pump connector being melted? I have seen this on one other occasion and was not able to repair the problem. The injection pump relay is ok.
Answer: SEE PICTURES BELOW.
The pump may be blown. But another common thing that will cause code P0410
is a 50 amp maxi fuse in the underhood fuse block. That may be blown. Another common thing that can cause that code is one or both of the
AIR diverter valves that are vacuum controlled by the bypass valve solenoid. That solenoid is powered by the IGN 1 fuse.
These two valves get stuck and do not allow the air from the pump to enter the exhaust. The valves are silver, and have small tubes running into the exhaust manifolds. They have 1 vacuum hose on them. One is above the belt, near the firewall, the other is near the dr. side of the front valve cover. Use a vacuum pump to see if the valves hold vacuum after making sure the solenoid is supplying vacuum when the AIR pump turns on.
The PCM controls the ground. Testing for vacuum out of solenoid must either be done at the solenoid, or if doing at the diverter valves, both valves must be disconnected, and plug 1 off while checking the other. Then plug the other, and check the first. If you just pull a hose off one valve and check for vacuum, and the other valve is bad, the vacuum will all go to the bad valve, and you will not get any at the valve you are checking. It does sound like the valves are bad. They should hold vacuum. A way to test that is to jump the pump relay so it comes on, engine at idle, use vacuum pump at 1 valve. You should hear a definite change in the sound of the pump when vacuum applied then released if the valve is working.
Oldsmobile Aurora Code P0410 Repairs
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