Question about Chevrolet Impala
The car was purchase a few weeks ago, had a constant noise coming from the engine like a brrr when accelerationing. Took it to an independent mecanic and he put it on the computer and it showed the Vehicle throttle control and secondary air pump malfunction code. Is this a serious problem and can it be fixed correctly or is their going to be further issues with this car. Its under warrenty, purchased used 39K miles.
Posted by Anonymous on
Then take it to the place purchased for repairs . DUH what good is a warranty you don't try to use
Posted on Oct 13, 2016
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Posted on Jan 02, 2017
SOURCE: Secondary air supply failure
I have a 2005 Envoy with a 4.2..... Just recently the check engine light illuminated so I read the code after replacing the 20amp fuse labeled cigar. My OBDII connection had no power so if you plug your reader in and nothing check the fuse under the hood labeled "cigar"
After pulling the code P0410 Secondary Air Injection Malfunction I checked the operation of the air pump by removing the hose connected to the solenoid. By the way the solenoid is located on the pass side of the engine top towards the back. After pulling the hose off the solenoid I started the vehicle when it was cold and after 20 seconds or so the pump should turn on and blow air out of the hose. Once I verified the pump was operating I pulled the solenoid then placing jumpers from the Positive & Negative of the battery to the pins on the solenoid. You should be able to hear the solenoid click which says its operating. But mine did nothing so I read across the pins with an Ohm meter and verified the coil was good.
So take some good penetrating oil and fill the inside of the valve with it. You can see the plunger shaft assy in the opening and thats the area you want to fill with a good penetrating oil!!!! Let it sit for a couple of hours keeping it full of oil. The housing is aluminum and the shaft is likely to be a brass material so rust is not possible. Its caused by a buildup of carbon!! The penetrating oil will soften the carbon which in turn will free up the plunger!! MINE WORKS GREAT NOW and plus you will save around $140.00 if you were to buy it from the dealer!!! Or $80.00 aftermarket from RockAuto.com
Posted on Feb 10, 2009
The P0411 code you are getting with that SAAB is the SECONDARY AIR INJECTION CHECKVALVE 95% of the time. This sometimes will allow condensation to build up in the air lines
that run to the air pump and air filter. Its part of the emmisions BS that they put on these cars. The check valve is costly, its usually about $100 or more depending on where you live I guess but its
much cheaper than $600+ dollars plus labor for a new air pump.
In some uncommon instances this may not be the problem, but this is a known issue with the SAAB Q93 and some other models. Once replaced it should be ok for another 100,000 miles +/-.
Hope this helps as late as I am finding your issue!
Posted on Apr 26, 2009
The air injection reaction system (AIR) is on all 2004+ 4.2's. There is an electric blower under the truck, tucked inside the frame rail about under the drivers seat. The blower draws it's clean air from a hose tied into the air inlet tube between the airfilter box and Throttle body, pressurizes it slightly and blows this clean air into a port in the cylinder head directly above the exhaust manifold, dead center. There is a can shaped check valve bolted to this port with the air hose clamped to it and an electrical connection. The most common failure point of this system is this check valve. Remove the hose, the electrical connection and 2 bolts and it's off. Very easy. Problem is, it's about a $125 dealer only item.:banghead: The check valve gets corroded/cruded up and doesnt seat. Let it go long enough and moisture from the exhaust can back flow into the system and destroy the $$$ electric air blower. I'd start by removing and checking the valve and check the hoses for water.
Inspect the air pump and wire harness under the Trailblazer's frame rail, since you did mentioned that your had your transmission serviced and they would have had to work under there to remove the transmission pan to replace the transmission fluid and filter. There are 2 fuses you need to check also. AIR fuse 60amp....AIR solenoid fuse 15amp.
Good luck and thank you for using Fixya
Posted on Mar 11, 2010
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