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P0410 secondary air injection system malfunction

12-07-2003, 05:00 PM
Ok i have a 1999 chevy S-10 blazer 4wd. It threw the code about a year ago. Well i am getting ready to go home for christmas. I am in the U.S. Navy. Well I replaced the Smog pump, seeing how the dealership told me that is what was wrong with it when i took it to them to get it diagnosed. He told about $300 to FIX it. Well being that i am a POOR Sailor, and an able mechanic,MM2(SS), i thought i could change it it being two hoses, three bolts and a plug! Sucess i did it, had the code cleared. well driving home the other day it threw the code AGAIN!
Anyone have a clue as to what else might cause this code P0410?
Any help would be great assistance to me!!!
Thank You!

12-10-2003, 05:48 PM
In my not wanting to get screwed by the dealers service department, and help speed the diagnosis process, i wanted to see if i could find possible answers to the problem! After about an hour of searching on the net i found the GMTechlink Web site! How about this a GM MADE website that post KNOWN problems with GM cars! BUT are not ALL recalls? um go figure!!!! As if the car is not expensive enough as is! They want you to pay for problems that they know about but dont want to recall them! It just so happens that the first dealer i went to the guy was an A**hole, i mean he probably saved me some money but, i live in CT right now with a couple inches of snow on the ground and NO heated garage, go figure why i did not want to do it myself! The second dealership was more helpfull and polite He scheduled me for a monday oppointment to get looked at.
Anyway, sorry about the discruntal tangent, the Gm website list possible problems and solutions, but their is no search feature. it has alot of good info on it. To BAD the two dealerships in my area dont know how to use it! Go figure!
Thanks Everyone and i will keep everyone posted on the end results

01-10-2004, 05:13 PM
:screwy: im still looking for info on this also . i figured the FUSE or the realy the O2 fuse was ok i need to locate the dam relay.. doesny any no where the secondary air injection realy maybe ..i had to buy the realy online because no one had them in stock or i got the statement wich is thats a dealer part is a great site .. any info on this code would be helpfull

01-23-2004, 09:18 PM
ok I have a 2000 s-10 2.2 4 cyl, which had the code, p0410, secondary air injection malfunction. I first was told it was the air pump, so I bought a new one and installed it, had the code cleared, and BAM driving it the next day the light came back on with the same code. Well after doing some research I came up with my own diagnostics.
1. follow the hose going out of the air pump to the top of the engine, disconnect it, and on a COLD START, the air pump should be pumping air through the hose, if it is not then the fuse is blown, or the pump is bad. There is 2 in-line fuses for this system by the battery, it is best to take the battery out to get to them, because they are not in the fuse box. One is a MAX 30A, the other, a typical 10A.
2. If the pump is doing what it is supposed to on a cold start, there is two other probable causes that I know of, one is about a $25 vacuum operated switch, and the other device is some kind of one-way air flow (do-hickey) which costs about $25 dollars also. These all connect on to the air pump one way or another, and the only thing you need to note is the in/out hoses, and replace those cheap hose clamps, with some quality, reusable stainless steel ones.
After replacing the one-way switch on my truck, the light still came on, and the problem all along was the $25 dollar vacuum switch connected to ther air pump. So after a few unneccary, costly repairs my truck didn't need, it is doing fine again. Oh well at least I have a whole new secondary air injection system now, kept the old parts as spares, and can't complain about that being the only thing so far with 70,000 miles on it!!! :)

09-12-2007, 07:44 PM
Any luck with fixing the problem? I have a loud AIR pump on my car.

09-13-2007, 07:23 PM
Hoppy, this thread is almost 4 years old. please refrain from posting in old threads :nono: . feel free to start a new one in the problem diagnosis section.

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