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.
JK:
That may be blown. Another common thing that can cause code P0410 is
Yes, there 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 control 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.
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.
JK:
That may be blown. Another common thing that can cause code P0410 is
Yes, there 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 control 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 and Intrigue Secondary Air Injection Code P0410 Repair.
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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
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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.
GM Dealer Mechanics
3.5L 3500 V6 or 4.0L V8