Even when you think it may not be valuable to you, its always valuable to that one person who really needs it. Thanks for posting.

I chased the same intermittent code on my '05 Chevy Trailblazer. About twice a year this code would set. All the fuses, relays, air pump and wiring checked out ok. I couldn't reproduce the problem. After two years of chasing this code, I discovered the solenoid was sticking. It would work 97% of the time. I replaced it with an AC/Delco part and haven't had any more problems.

The videos are always worth it no matter how simple the fix because we get to see the proper thought process of how to troubleshoot a problem. You even took the time to show people that don't have bidirectional controls how to troubleshoot all three relays or components.

Great video, I appreciate the step by step, my sons truck just set that code, and now I have a great starting point. Thanks it’s about time I found a guy who actually knows how to get in depth in communicating how; what & why. Keep,up the great videos. I will continue watch them.

I really don't hardly make any comments, but this was one of the most thorough, professional troubleshooting videos I have seen. It's interesting to hear you say, "could it really be that easy," as you literally tracked down every single possible source of the code, and then continued to address problems after you found the most likely source. I really appreciate you sharing your knowledge. I just wish I had a professional scan tool like that. Thank you for the video.

Nice to see an real technician tracing a problem. Most DIY videos are by backyard part changers. Thank you for your Great Video and tutorial!

very good and thorough mechanic. great job man. so glad to see people that actually find the problem and not just throw parts at it.

Great step by step video. It was absolutely worth you making this video. Thanks for taking the time..

Dude you're awesome. I sincerely appreciate you and people like you who are willing to share knowledge. You probably can't imagine how many people appreciate your advice. Thank you so much. (Marvin Mac)

Great video. Your step by step troubleshooting is just super and very clear. Thanks a lot. You’ll make a great instructor.

I always appreciate the time and effort you put in making these video...

Those damn parts changers. Great to see you diagnose this the way it should. Thanks for sharing! 👍

Always a treat to watch you work, thanks Will.

GREAT VIDEO, I liked how you explained every detail and how to check it without the bidirectional scan tool, best video I've seen keep up the AWESOME JOB...

Excellent system description, love the way you show various methods depending on tools at hand. Gotta think the previous tech proved the pump was bad by directly powering it, then didn't remember to check the relay as well. Two problems, both caused by corrosion in a vulnerable spot.

Hell yeah, this video was worth putting out there. I have a 2005 trailblazer with a 410 code and what you just showed me was amazing Thank you so much.

Good to see you back with videos! Awesome teaching, I understood everything you presented. Take Care, Bill

Always worth putting out a video with a great diagnoses process. Thanks Will and great to see you back making videos!

I have this new part and will change soon , this video best ive seen , great step by step and love how you showed everyone the electrical , and trouble shooting

Thank you for bringing us along, we missed you. Glad your okay.

This video was extremely valuable to me (and I’m sure others), please continue to post more like these! I really enjoyed how you took the time to show and explain the wiring schematics and how certain things could be tested with or without a bidirectional scan tool. I very much appreciate how you took the time to show the live data and explain what we should be looking at, I just bought myself my first bidirectional scanner and as a novice DIY’er I have a hard time understanding all the live data that it gives me… Also, where can a DIY’er get the explanation that you showed us on your screen of how the secondary air system operates, that too was extremely helpful. Thanks again

Way above my paycheck level but it was awesome to watch you troubleshot this system this way, wow is all I can say, and thank you for posting this "extremely valuable " knowledge.

Great video Will!! Don't question whether or not to post a video. Someone replaced a lot of parts without fixing anything... your information / video(s) will be of help to people! Very thorough as always! Wow... Das Kaput Relay!!!

Welcome back Will. Awesome diagnosis and fix.

Good to see you back! Love the step by step process 👍

Thank you for this video. When I checked out the relay next to my pump I found that some AH mech unplugged it thinking they had a suckered. I cleaned up the contacts plugged it back in and so far seems fine.

So cool I found this video.. It's exactly what I had to repair todsy but my plug end was pinched and both red wires were severed. After repairing the wire the pump came right on when I started it and I hadn't heard it before.. it was all fixed before I saw this but it helped me confirm it all.

Welcome back, Will. One of your best vids yet. Thanks for sharing!

Thank you it can’t be more clear than that man excellent video

great video. I especially like the step by step analysis. check, prove then proceed. Dave.

really great video! Nice to have you back.. thanks for sharing

Great video wish i lived close to you a good honest mechanic is hard to find. 👍👍👍

It is of great value to a lot of us, thanks!

Will great to see you back with a great video with great info thanks

I smiled when you found the fix. I appreciate the explanation of the process if you didn't have a scan tool and the visual of the O2's working as they should. Oh yeah, that relay was spanked. Great video Will!

Really talented mechanic!!! Thank you!

Welcome back Will! Glad you were able to track down that faulty relay...feel bad for the guy who fired the parts cannon at that thing and missed the target though.

This was super informative to me. Thank You!

Great video super helpful thank you!!and blessings for you and family

Good morning family and thank you for the valuable information 👍👍

Thank you very much Will. Great job brother. So nice to see you. Been thinking about you. Have a blessed and safe week.

Thank you so much for this awesome video. Really helped me out and I learned about the Code P0410. Very thorough.

Excellent diag and repair., Will! 👍 Nice to see you again 😊

Thanks for this video!!! Especially the tester trick to check the relay

Excellent tip Will using the test lamp as a current limiter, thanks for sharing!

Your Viedeos get better and better - Quality and Explainatory !! Thank you und hope to see more in the near Future !

EXCELLENT video. Learned a lot. Keep it up!

Excellent and thorough work.

This video help out a lot. Thanks for it

Nice video Mr Robinson,very well explained

Great video! From San Juan, Puerto Rico.

Great video ...good to see u back ...as usual very informative

thank you, i threw parts at this vehicle, but never replaced the relay, pump kicked right on!!! thanks!!!

Great step by step troubleshooting video! I learned a lot from this. Thank you for posting it. I will use your tips of troubleshooting and try to fix problem code P0410 in my 2002 Oldsmobile silhouette this Friday.

Great Video, and of course it's worth uploading. Just think of whoever replaced all that parts on the car, it reminds us there is a lot of demand for these kind of video's. Glad to see you uploading again, i always enjoy your video's👍

Better explanation, ever, thanks a lot for your video

Very valuable video. Thank you

Enjoyed your video good learning one thanks

Glad to see you are back

Very thorough vid!!

Thank you very helpful video. I appreciate you.

excellent video. I am about ready to do this same job on a 2004 trailblazer

great vid good to see u back

Thank you I appreciate this video I changed the relay on the secondary air pump and the pump turned on and the code went away

At least the computer is not there like some cars do, just crazy lol... perfect place to get water intrusion; great video man!

I thought your video is awesome and taught me a lot so no your video was not pointless

Well done mr Robinson.

Awesome video as always Will !

Finally someone found the problem.

DONT PAY THE RANSOME, HES ESCAPED!! Welcome back, Will. Where ya been!! I almost forgot about you. ALMOST!!! Glad you're back!!

Great advice and thanks good job

great job thank you very much for your information , I do have that same simtoms I hope that of fix my problem .THANK YOU

Good Information, having this issue as I comment, thanks

Thank you.verry informational...

Sir yur explanations r so vivid that u should b college courses! And I liked the ground side testing of the relay w/ the power probe!

thanks for the information, I have a problem on a C5 2002, so I have to find the relay now.

GREAT VIDEO HOW YOU EXPLAINT THANK FOR YOU TIME I LIKE YOU METHODS

Excellent video.

Thanks ..great explanation My 04 envoy pullin 410 code ..its derivable BUT after warm up engine looses a lot of Power for a few seconds to maybe a min - 2 then it runs like an scalded dog Again & them repeats over & Over ..so gota figuar out it its an Bad O2 upstream o2 down stream or replay or pump itself or Check Valve on engine ..thanks alot ..give me an good start to get my daily driver back up ti normal

great diagnostic routine if you have time. in a busy shop, when you see a new computer, new air control valve and new pump, you should go straight for the relay, disconnect it and check the terminals if you don't see any corrosion. spending 30 minutes on-camera alone makes me think that those new parts were most likely replaced by the same person here.

Good video Will I was just thinking about you, its good to know everything is OK. Its also good to know my TB has a vacuum cleaner.

Nice job thanks.

Very professional

Great teaching lesson. You need to have the correct wiring schematic and be able to follow the circuit.

I missed ya big guy. I think the evidence of rust and corrosion proves water intrusion. Sounds like others shot the parts cannon here but, you being a gentlemen, did not point fingers. Thanks for sharing Will, puts a different perspective on trouble shooting. I suppose everything could have been tested using a power probe. Maybe next time you can troubleshoot it the hard way, using test lights, then prove it with the scanner. Lol. Just a suggestion.

Happy to see you again man! You always have great videos with valuable information. Missed ya a little....in a manly kinda way....I may need a bro hug, :-)))

Great video Will

Great video

When testing secondary air injection systems I like to think of it in three sections electrical side mechanical side and The minoring side.

It works for me thanks

very well done thanks

Right on.. thanks

Awesome video! Almost order parts, decide to test n check relays, fuses first before I replace parts, now. By the way, what brand is your scanner?

Hi, I was wondering if that bad relay also activates the solenoid that the air pump is connected to? My air pump is working but the new solenoid I put on is not opening/clicking, like it's not getting any power.

Great video, replaced pump, valve, relay, still throwing P0410 code. Any Idea? Thank you

What tool or software where you using to diagnose and start the secondary air system

Could this cause it to rough idle and stall with heat and ac on? I don’t think it will but I only have this code and I can’t use my ac or heat without it instantly stalling on me. I have done the following, cleaned out the throttle body, changed fuel filter, spark plugs and coil packs, evap system. Stumped. I don’t have any other codes except this one

very good!

this is great information thank you. but for the people that dont have a fancy dancy controler like you have, are there other ways to trigger these parts? how much did your check/controler cost you?

I have a mercedes ml320 and its cranking but its not starting, qnd a diagnose said its the secondary air inyector is it possible that the car dosent work just for that?