One of the best videos I've watched, process of elimination is key here , great job verifying what part is needed 👏👍💐

thanks for taking time while you are working away from tech department it is more like the issues we have to solve when working on cars as we dont all have high tech equipment at hand so well done son

working on it Frank. It was hacked last week, and was down for 30 hours. It came back on-line for 4 or 5 days and now was hacked again. This time the main server. I will extend any time for any video that you have purchased, no problem at all. Sorry for the inconvenience. Keep checking, it should be up later this evening. By the way, I have extended all video lecture time periods to 90 days.

Thank you Frank, I appreciate your patience. Let me know if there are any you want to see again. I have no problem extending your view times. You are a valued customer! Send me a pm or if you know my email address, and let me know which ones. On another note, my web hosting company says everything should be good by tomorrow morning.

Good one again Paul! I know this vid has been posted some time ago but the system has improved by incorporating a pressure sensor to the solenoid to aid monitoring. This sensor produces a baro voltage of about 2.8V (pump not in operation) and about 3.3V when the pump presents pressure 1.5 psi above baro pressure. Just a little info I thought would be fitting...

I have a client with this code and unfortunately I don’t have a scan tool with directional controls. Thanks to your video I have a better idea of what to do for testing purposes. I figured between you, South Main Auto, or Pine Hollow Auto Diagnostics I would find my answer.

You seem to need a general tips type of faq video to cover basic things so you can stop "survivor man" ing yourself but thank you so much for the efforts you put forth to show everyone what your doing even though it sucks more people don't watch your great videos.

good vid SC i have this problem, just bought my ovn scan tool, fountain tire were going to charge me 167 bucks to diagnose the problem only, not fix it, this is the way to go!

I knew I should have came straight to a ScannerDanner video; could have saved me a lot of frustration.

Having an AllDataRepair.com account really helps out with situations such as these, as far as locating components, OEM part numbers, system design diagrams, etc. Although not necessary, it does help out under certain circumstances. Also to add, my 2001 S-10 4.3L, which I replaced the pump and diverter valve on a couple months ago had no data PIDs to speak of. However, it did give me the option of turning the pump/relay on using AutoEnginuity software that I have, via the bi-directional functionality for many components. From there, I had to diagnose the problem, which turned out to be a frozen air pump, blown 30 amp fuse, for obvious reasons, and a faulty diverter valve that was filled with water when I pulled everything apart. This is a common issue for the S-10 trucks with the 4.3L, and also the 2.2L engines. The redesigned GM part has an atmospheric tube that can be ran wherever you like. I ran mine up beside the radiator housing and secured it there.

Parameter Identification Data STFT and upstream HO2S is what I would have looked at first. Some of the Volkswagen vehicles are notorious for AIR system faults. I personally can not stand the sound of air pumps, sounds like an obnoxious vacuum cleaner, like a Dyson, lol. Great video once again Paul, keep them coming

Paul, great video. Following along it seems that with good power and ground, loaded circuit, it could still have an open in the solenoid coil itself. I suppose the fix would be the same either way, solenoid and valve are one part. Going a little further still it is possible to have clogged passages in the cylinder head, or manifold -where ever the valve mounts. So solenoid and valve may be working, but there is possibly another blockage. Sometimes i spend too much time thinking about all the possibilities, even unlikely ones. Very good instructional diagnostic video.

Thanks for the video!!!!! Time is money!!!! Quick check can save you money!!!!Great Video!!!!!!😊😊😊😊

i just did this on my cadillac, little different design but you wouldnt of been proud of me paul, i just bought it with the MIL on for a po410, and got a discount for the mil being on, i pulled the code before i bought it, i knew the pump was bad it was full of water, but i just''THREW'' the check-valve in it just so i wouldnt have to worry about it. it was a 2004 original check valve. we know how you hate part throwers, lol

great video, if you do not hear any exhaust noise when disconnecting the hose and the diverter valve is activated open, for sure stuck close or plugged passages, though i have never seen plugged passages, thanks in advance for all of your very educational videos

Thanks for the video - getting both a P0411 and P2440 codes on my 2010 Impala - figure the system is pretty similar to this one. My scan tool unfortunately cannot force the air pump to run - will have to do manually. I've had to change this air bypass valve once before. Can't believe it is gumming up already - like 30000 miles later. But will go through all connectors and power leads and check the blower as you have done. Appreciate the video.

Yeah i agree it does look like an egr but not,i do smogs in california and we had the problem.. always better to check voltage drops when is the circuit is loaded totally right,keep it up PAUL..

I always learn something from your videos. Thanks. I've been fighting an intermittent 411 code (SAI insufficient flow) on an 09 saturn aura with 2.4l ecotec since about 12,000 miles. Dealer tech replaced almost every system part inc. the check valve, inlet hose & the air pump. The new air pump seemed to solve it till the 3yr/36K warranty expired. Now it returns intermittently.

Can you test the air pump with out the scanner like manually??

Should be back up shortly, sorry for the inconvenience. Thank you!

It is simply there to improve start-up emissions. Introduce fresh air into the exhaust manifold during the high HC/CO (rich exhaust) event of a start up and you can continue the burn in the exhaust manifold instead of just dumping these pollutants into the atmosphere.

I thought this video was good. But all your videos are good.

Now all I need is a vid on how to replace.

GMC Envoy Thanks for that diagnosis

For a moment I thought Paul was going to say "I'm sweating my balls off" loool. BTW the noise comparison was an excellent point in diagnosis. It definitely sounded like when you take your hand and put it over a vacuum cleaner suction tube or apparatus. I wonder if all applications work like this one. It has been a while, but IIRC on some BMW's, the engine must be running for the system to operate to spec. But the specifics escape me.

It is just a momentary test, but yes, in theory that is what happens. And how much fuel addition to bring the O2 back rich = amount of airflow from the pump

very good paul you make it exelent

More good stuff to know, thanks for the video.

yea mate, i get the theory. what im suggesting is there may be some degree of cloak and mirrors when it comes to the actual readings. if, for example, you were to pump air into the exhaust 30cm before the opening at the end (where the lower temperatures wouldnt allow burning of any excess hc's)- any gas analyser readings would read less HC's because there is more air.

You could put your hand on the tailpipe to see if the air is coming out. That wouuld check the diverter/solenoid valve opening.Of course KOEO

Also, carbon build up in the head could be blocking flow if diverter clicks (opens). Can feel for difference in the vacuum at intake pipe if pump is good

On my 2010 Impala I was having this problem with a very poor start in the morning when it was cold. Car has about 170,000 miles. It acted like it was flooded - but I did not smell excessive fumes coming from the tail pipe. Once it got through the rough start it ran fine, especially when it was warm. Seemed like it only ran poorly when it sat overnight and was cold. Checked for codes but there were none. I went through and systematically checked everything like injectors, vacuum leak, gasket leaks, fuel pump pressure, ECT and AT sensor readings... etc etc but no luck. Everything seemed fine. I then took off the pipes for the secondary air injection system (since this system worked only in the cold start-up period) and the pump was running... but I wondered if the secondary air injection valve may be the culprit. Again - no codes. Took it off, cleaned it, lubricated the upper section and we're back to normal. Bugger valve was sticking - probably closed. I suspect the ECU commanded a rich condition for startup for that initial 90 sec run of the air pump, but the valve wouldn't open and prevented the necessary air injection. But the bugger thing wouldn't set a code. I wonder how my catalytic is though... acceleration and power seem fine. Anyways - just thought I would write this for others that may be having the same problem.

Thank you very much! Paul. God bles you

Man. I love ur work

I had a check engine light hooked up a scan tool and got po410 code . I cleared it just to see would come back , so far it hasnt . Quick question Do do think it be able to pass emmissons ?

It wasn't the EGR valve. It was an AIR diverter/solenoid. No I didn't do an ohm test as it wasn't needed to properly troubleshoot this problem. The valve wasn't opening. Whether it was an open coil winding or just mechanically stuck shut, I don't know and didn't care. It needed a new solenoid. I am pretty sure that it wasn't an open solenoid though because I would have had a solenoid circuit problem trouble code which I did not. Either way, it didn't matter.

....you are the man....

Would of liked to see o2 and st term after repair

nice

i was told when i was an apprentice mechanic this system is just to fool gas analyser readings to make exhaust emissions seems better than they actually were. seeing as gas analysers dont measure gas quantity you could use an air pump to simply dilute hc's, lowering their ppm reading. my teacher was highly dubious of this systems actual effectiveness even though the principal of adding oxygen to create auto ignition of remaining hc's in exhaust manifold seems correct. what do you think paul?

Thank you so much. 👍👍👍

Hey Paul, I often wonder why people put a thumbsdown on your videos...do you get responses from anyone or haters that don't like your videos?

Great video!!!!!!!!!!

Hey Paul. You've taught me more than anyone ever has and need your advise. I currently am using my solus ultra and vantage pro. SO dropped off the versus pro fully loaded. Do you have an email I could get your opinion on a couple of things before I get this thing. I own my units and have a zero balance with him and like it that way. But this thing is way cool. Thanks in advance.

Bing bang, another good vid, thanks

It's not for fooling the gas analyser. At start up the catalytic converter gets more HC and less O2 than in normal running condition, resulting in more HC coming out the tailpipe (let alone CO). By introducing more O2, the cat can convert (burn/oxidize!) more HC's to CO2. As an added bonus the cat gets warmer faster so it operates better sooner.

So I believe this is what is wrong with my '05 Envoy. I have not tested it like you have in the video, but I can audibly tell that the diverter/solenoid you mentioned is stuck shut. Supposing that my vehicle is having the same problem as the vehicle in this video, how do you fix the problem? Do I need to replace the diverter/solenoid?

Good job!!

Based on popular codes per manufacture

Man u should do a quick guide on manufactures specific., using ur test methods, like fords dpfe and yr models test procedures all good for. Fords return less fuel system yrs from etc

Thanks for sharing Paul, if the air pump creates a lean 02 signal and that forces STFT to go + then does that not mean the engine will run rich to correct it?

send me a private message on youtube. I don't want to list my email address here.

Can it also be a clogged air port where the air check valve bolts on

Is the air pump suppose to make that whirl jet like noise? Or does that mean it's bad? Because when I start up my 04 Deville when it's cold it makes the same noise for about 30seconds. Then goes away

Another great video. Been a while you go on vaca or something?

good job

Great demo, what your calling the solenoid / diverter is that also the same as the Check Valve or also called shut off valve? On myn 04 Trailblazer that is what they call the same part your referring to as solenoid / diverter , unless I am seeing you touch a different part .Thanks in advance

if the hc reading was 50 ppm without addition of any ambient air, but then your pump output the same quantity of air into the exhaust as the engine (doubling the quantity of gas measured) you would get 25 ppm. you with me?

Hello, I have a 2007 Saturn Ion P2431. The air pump is working. How can I be sure it is the divert valve without high level scan tool? The valve has 5 wires I believe. Seems that the valve stuck so the flow is off and trips the code. But how can I be sure? Thanks.

Any discount on the paper book for people that already own the e book?

I have a 2008 buick lacrosse cxl 3.8l i just replaced my pump and my check engine light is still on i might have to follow your directions do you have any advice.

I had the EXACT same symptoms and diagnosis on my 2005 Deville 4.6L with its vacuumless smog/AIR pump system. Unfortunately, after replacing the air check valve/"solenoid" it did not work although I measured 12.4+ volts at the plug when the system was on. I tested the old and new air check valve/"solenoid" against the battery and they both operated which lead me to believe it was a connection or current issue. After verifying the connections were fine and no resolve I went back to the AIR PUMP VALVE MINI RELAY which was the ISSUE. It was failing... You could hear and feel it click barely which was giving voltage but not a good enough connection for the required amperage. IF YOU HAVE THE SAME SYMPTOMS AND DIAGNOSIS HERE, you might need a new air check valve/"solenoid" OR a new MINI RELAY.

Damn, I wish I had seen this video about a month ago. I had been back and forth with the place that I got my 04 Envoy from over a constant P0410. He told me that he finally got it, I am going to ask if it's that electric check valve that did it.

Love your video's. Why is your site down?

Hi Paul, During your troubleshooting of this EGR relay/air flow problem with the pump, did you do a resistance check of the solenoid? To me, if the relay coil was open, then it would have exhibited the same symptoms as a carbon'd up pintel in the EGR valve (stuck). What was the final R.C.A (root cause analysis)? Tom D.

Great video, I need your advice to solve this problem with my 2005 ml350 W163 code P0412 secondary injection pump valve A malfunction, I'm getting ground with my power probe on both sides of the 2 wire electrical connector to the air pump solenoid when the key is on I'm getting 12 volts on both wires check engine light is on. Your help is highly appreciated.

My 96 f150 4.9 has a p0411. I wish I can understand all that you’re explaining in this video. I’m so dam slow😒 haha

I have a 2004 GMC Envoy and I have the code P0410 secondary air injection system I change the selenoy, the pump works. When I start the car I hear the pump and the selenoy work for 40 seconds and then it stops how long is the pump a post to run for?

just did air valve fould up reset code to off but how do i keep water out

paul, what is going on with the lecture website? autocomputer troubleshooting?// havent been able to access my lectures for a week or more..now it ses error 404.and its a ad for a PC cleaner??? crazy.. but im losing time on my 45 days of access.. any idea when this will be fixed?

Good evenings where is the secondary air injection injection pump located on 2012 buick regale located I have been looking everywhere on this engine

the computer doesn't detect the air pump ...it says "ready" for the last month i have an gmc sierra 2001 1500

What if the pump is working but not getting any power to it

How do I get the code to clear? I have replaced the part.

Dear Paul. I have a cavalier 1999, 2.2 engine. The engine has an overheating problem. Once you turn off ac start overheating.. So have to keep turn on the ac in order no overheat . I changed: thermostat, temperature sensor, refrigerator deposit, etc. Please I need you help.

Is air always on from the hose u pulled off.should air be flowing at all times?

can that pump can cause my 2005 4.2 Trailblazer to have a higher RPM and loss of acceleration

If its open air would be at the exhaust pipe with pump running

You ever use a power probe

I have no power for the wires to the air pump the relay doesn't have power either please help can find anything about no power going to this pump mine is on a Chevy cobalt but same concept

What's the name of the scanning tool you using (verus?).

Good mechanics know what the P0410 code means. It means another pump filled up with water. A new one will do the same thing, it's just a matter of time.It's a manufacturing error that continues to be made.

do they make a bi directional scan tool for under $600?

What scanner are you using?

ok no problem..didnt know if maybe you just decided to end the lectures..''which i would of been very disappointed ive bought every one so far''..sry about all the problems..

I have a 2017 range rover sport 3.0. Can't find it

where's the air pump ? and relay?

I SAW IN A CAR THAT WHEN THE AIR SOLENOID WAS STUCK CLOSE LIKE IN THIS VIDEO, WHEN YOU MAKE THE AIR PUMP WORK, THE ENTIRE SECUNDARY AIR SYSTEM WORK WITH THE SOLENOID STUCK CLOSE, IT MAKE THE O2 SENSORS GO RICH!!!!!!!!!, WHY IT DID THAT IN THAT CAR????, MAYBE BECAUSE OF ELECTRIC LOAD OF THE RUNNING PUMP?, OR THE PCM ANTICIPATING A LEAN CONDITION?

No that is not it . Its under the vehicle under the driverside seat.

Ure A Bad Whipa'Snapa,Thanx For The Knowledge,I Learned Alot From Yor Video (^_^)

How can you load test the circuit with a defective component?

Air injection has to be one of the most backward ass stupid fucking systems Ive ever heard of... WTF.

All these videos show you how to test with a computer with specialized software that nobody has. LOL...FAIL.