Problem with my 2001OldsmobileAurora 3.5L.
I r eplaced 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.
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.
The Secondary Air Injection (AIR) System reduces exhaust emissions following initial engine start up.
The powertrain control module (PCM) activates the AIR system by suppling a ground to the AIR pump
relay and AIR solenoid relay simultaneously. The AIR pump forces pressurized fresh air into the
pipes/hoses and past the check valve into the exhaust manifold, accelerating catalyst operation.
After having my transmission rebuilt I have this trouble code up po410,what could be the cause?
David Del Polito Said:
I have a 2000 olds intrigue, 3.5 with only 60000 miles on it, In one the other questions, there was mentioned a grounding issue that could possible
cause a intermittent problem shifting with the trans. I went to two different trans / mechanic shops, I told me it had to be rebuilt at a cost of $2000. The
other mechanic shop said he ran the diagnosis thru his snap- on computer system and found no codes and test drove it with his hand held plugged in
but found no problem? Can this ground be the issue. Can you tell me how to resolve it. I personally changed the oil and the trans filter, but I was
told that doesn’t replace all the oil only the pan oil. Thanks for any advise.
David Del Polito said:
Ok so first how do I get a complete oil change on the transmission. Second I never had a error code or trouble code come up ,flash or was told by the
the second mechanic he showed nothing on his diagnostic computer. But I was co concerned that the shifting wasn’t good but it now seems
intermittent. Any suggestions. Thank you for your input.
David Del Polito said:
Ok thanks I’ll try that.