Mercedes W203 trouble code P0410 and P2036 secondary air injection fix 

Wow, you did quite a research on this engine. Your explanation of how and why this system works really helps. Thanks a lot for sharing!

Thank you for taking the time and trouble to put this together very helpful in explaining the system which is similar if not the same on my 2002 CLK.

Thank you so much. Can finally fully Understand how this whole secondary air inject system works and diagnose the issues. Awesome video

Video was lots of help. Thanks for putting it on here. I had to replace the flap that opens and allows supercharged air in. It was stuck closed and ran terrible. And yes it was expensive. Just the part was around $400. You're right, don't start there unless you have to.lol

Awesome video! Good job! Need more videos like this. Videos that are detailed and knowledgeable and actually informative and helpful.

What a video man. Kudos this helped more than any forum. Thank you

Great video and very good instructions! You helped me to repair my 2002 CLK C200. Thank You very much! My best wishes for You from Finland. Keep going :)

Good news for those with a 1999 C230 Kompressor. The two replacement valves are near the front, passenger side, close to the air box and hose to the compressor. They are simple to get to. The shut off valve is easy to remove and replace. The check valve is hard. It is screwed in very tight to a brass tube. You can't get a wrench to the nut on check valve and even if you did it takes superhuman strength. All is not lost. Follow the brass tube underneath the car. Jack it up and you see it enter the engine case and is held on by a easy to get to nut (look near the O2 sensor on the exhaust pipe). You can now remove the hex bolt holding the bracket of the brass tube (back in the engine compartment). Pull the whole tube out, put it in a vice, and now you can get leverage on the check valve. Reassemble and clear the code. By the way it was my check vavle that was severley carbon corroded.

Thank you so much for the info! Especially explaining the use of that second valve and how it can fail. I bet thats where all the trouble is gonna be for me. My MB SLK 200K also has a supercharger and has no separate electric pump. Not much can go wrong with it except those valves. Why on earth do they even make these emission systems is beyond me. How much emissions is it going to prevent compared to all the trouble it makes? I bet all the emissions its purportedly saved has been wiped out by so many trips to the mechanic just to get that thing fixed!

Do you happen to know the part number or name for the brass pipe that you connected compressor to? If you go under the car it’s connected to block itself and has a large bolt maybe 1” head connecting to block and my thought is if I can remove it I can clean it take off the pipe completely since I don’t have access to air

This is a good detail of the air injection .

Awesome vid, thank you! You helped me out a lot. We should be able to screw the damn thing off but I guess some sort of Mercedes tool is required... I cleaned it but I'm afraid it's too rusty. Let's hope for the best! Thanks again - Greetings from V in Belgium

That was great I now have an idea and the info to tackle my error code Thanks for the video

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

Thank you very much for the video. Very well explained. Now I know where to look for what's wrong.

Thanks for the video. It is good to see someone else's working ideas on the M111 engine and the dreaded 0410 code. I am doing the same myself at the moment. Following along with your sound logic I checked the vacuum at the servo input and output. In, yes. Out, no. The big question for me is where does the other line off the bottom of the servo go and what does it do? It seems to be a bigger vacuum line. Any ideas?

Thanks for the information, after driving my car from last fall until the shutdown without a problem, all of a sudden my CEL light comes on if I let the car sit at idle (it seems to happen only when I allow the car to idle for a few minutes) It has not put the light on, but I think the car standing in the garage without being used may have caused the problem you are showing.

Please help im lost. I checked the electromagnetic check valve its working OK. I also have constant vaccum from the kompressor that connects to the solenoid. I cleant the denso control valve also OK. The check valve i replaced with a new one ( that you cleaned in the video). The problem is, i have no boost presure from the manifold that is bypassed before the the denso valve. I assume a O2 sensor could be bad or the waste gate ( trottle body on manyfold side or near the kompressor is bad). There is no pressure in manifold for 30 sec. Any ideas ? Could i try to reset the throttle bodies ?

Thanks for the video!

The codes I have are p0410 and p0418 I all ready replaced the injector fuel pump. What are the next step i should do. I got a clk350

Very nice explanation, understood The System for the First Time ;-) I replaced both valves but still get Codes, now i will check the vacum lines... Agree with the checkvalve, Its a real mess to remove it, hat to build a Tool...

I managed to remove the check valve quite easily using vice grips tightly clamped on the metal pipe just below the 27mm wrench point on the valve, then using the 27mm wrench with the vice grips as an anchor squeezing them both together to undo the valve.

Very interesting and hope helpful for my slk 200 k which seems very similar to yours with p2036 error!!!

Man ,you are more than expert 👍

My question is after you cleaned the second valve by the firewall how did you suck the dirt out with the vacuum?? I checked that the first valve was blowing air strong so I think my issue is with the second valve but I’m not sure how to clean it and don’t want to mess up my cat converter. Thanks

Does it have a relay even if it dont have the air pump??. My engine looks different my supercharger is on the intake manifold side.. The air valve seems to be located on the passenger side.. Im not sure.. Can u help me out?

i found water in my 2010 MBenz secondary air pump do you know why

Thank you soooooo much Friend same problem no answer until now thank you

Tks, but my problem does show up on the scan tools, but the main problem I have is misfire, 2-3 cylinder, but I change the coil and spark plus few month ago. I even check my injector is running fine, but idk why keep saying Mis and air, and someone is show up at Wastegate problem, if showing misfire I turn off and turn it back on then problem is gone

hey am Peter and I like this video, it's nice and it helps me understand how the secondary air is forced into the egr systerm( emission). but am a little bit confused how the actuator is connected below the intake manifold . I mean the egr electric valve actuator . I can see 1 line going into the valve suction point. but for the line below and the other at the top. am kind of confused about it . thanks

So if my 02 C coupe is going into limp mode with the p0410 code its most likely the throttle body over the supercharger not working? I replaced the check valves a few years back when I first had this issue but it seems now the actuator over the supercharger isn't working, when I have the hoses all disconnected from it to see it working, it doesn't move when someone gives it gas, but I relearn the positioning of the actuator I can see it move in neutral when someone is giving it gas. Just trying to make sure I'm replacing the right part. Thanks in advance.

Thank you for the information. I have a 1999 C230. Hopefully it has the same valve setup 2.3 Kompressor. Similar codes. Hope mine is not the super charger. My car does go into limp mode but....only sometimes. 70% of the time it runs fine. 30% it bogs down. But I feel like I still haven't experienced the full power of the engine. I've run some StarTron enzyme fuel treatment and some full synthetic high mileage oil treatment fluid. It performed So much better ..but still the problem exists.. Bought 11 days ago.

Thanks for the vid! I did what you showed and I did have air flowing thru the exhaust pipe. I replaced the top valve but check engine light is still on. Do you have to drive for certain miles to see if the light will go off? Also, I read in the forums it could be the O2 sensor but the only code I'm seeing is the P0410

My 2001 C200K M111 engine won't start properly. No consistency in the process. It might stall a bit at start up and loss of power while driving. Again, not all the time. I'm suspecting that the air flap might be the culprit. Any advice will be greatly appreciated.

Hello dear Im having oil in the intercooler and no one knows why and what i should i do if you know please help

What's 'limp mode'?

ok I have the same car 02 Mercedes 230 komp what it does is starts runs just like you said runs for 30 secs then it stops ..when the car stops it makes this pump noise like a suck pop lots of air buing rush at once but it does it after the cars stops and my car does not have that whole othe throttle body and air filter just the one small round one

My 2005 c230 Kompressor is pulling 2047 any help ?

can you help me.I checked everithing but i havent 12v in the solenoid...from whre it takes info or 12??? pls help me

I've just readied my Secondary Air System test. I have a 2005 c230k. here's how I did it. I've done it in the summer where the nights have a low of about 80 degrees F. let car sit all afternoon into the night ( 8+ hours to cool engine down as much as possible). start it and idle until Engine Cooland Temp reaches 160 degrees, should take 5+ minutes. may want to increase idle to 1200-1400 to increase temp.

Hey bro can you please please PLEASE help me out!? I'm getting three codes. P0410 P0174 P0400. Starting with the first. I have a 2002 Mercedes-Benz C320 Base 3.2L. I'm getting p0410 cel code. I've tested the secondary air pump directly and it works perfectly. But when I go to check the voltage at the 40amp fuse, nothing. There is no power at all when the car is off or on, cold or hot. I pulled the relay and checked it and it is functioning perfect on all terminals with 0.001 resistance. Am I missing something here? Why would there be zero power at the fuse? Shouldn't the fuse have a constant 12v and be wired in BEFORE the relay? I'm just about ready to pull out the entire fuse panel and rewire the secondary air pump. Has anyone had this problem before? Tomorrow I will pull the egr valve and tube for cleaning. Hopefully this gets me somewhere on the P0400 and P0174 codes. Does anyone have a diagram of all vacuum lines on this vehicle? I've traced and replaced a few lines, but I am very sure I have a vacuum leak somewhere that I don't see. I do not have access to a smoke machine. But would the cigar technique work? If so, where should I be pushing smoke in? Any help is greatly appreciated! I'm not sure what other relevant information I should include. But whatever I am lacking, please let me know and I will immediately go out to my vehicle to get it.

In order to test the whole system? Can I just turn on the air pump (connecting it to power) without turning on the engine and see if there's airflow at the exhaust pipe?

Yesterday i turn on the car and after i've made 7 km, check engine light it appeared was the p0410 error... why after 7 km and not in first 30 secounds when the engine was turned on ? Can you help me please? I have c200 2.0 kompressor 163 Hp gasoline engine

One question is rough idle when engine is cold releated to this if that vacuum actuated valve is not working and it is always closed?

Hi, Thanks for the detailed demo. I followed the same and took out the vacuum tube from the valve, it solved the issue and the car started fine. After a while when I closed everything else except the tube on to the valve and used OBD2 to see the codes. There was still the p0410 which I erased. After that when I tried to start the car, the key stopped turning and hence I cannot start the car. Can you help. Thanks

Hi! I have problems only in winter when outside temperature is 0°C or -°C. If I start the car in the morning, I have P2039 code and the engine loss power. After 10-15 minutes come codes P2036 and P0410. When the engine is warmed and I delete the codes, everything is OK and the power is back. When the temperature are +°C, everything is OK, I dont have fault codes... Can you help me please? CLK 200 Kompressor EVO, 120 kW, 2002

9:42 how did you un clog it I feel no air blowing out my exhaust when I do that ?

HELP - dude i have the same engine and have 0-100 13.2 seconds... no fault codes, no misfire just power loss.

Not doubting you, I have the same vehicle year and all, but the hose you have hooked up to the compressor I have air coming from it, not being sucked in. What would be the cause of that? Isn't air supposed to be going in not out? Maybe I misunderstood.

My kompressor doesnt seem to work if i dont let the ignition stay on for about 20 secounds before i fire up the egnine. What could this be? If i just twist the key all the way instantly my car has very love acceleration..

What if i got the code "p2036 secondary air inlet". After resetting by car diagnose, car runs normally. Ater about 50km the engine losts power, it goes like without a supercharger, but i hear that charger is working. Is the issue could be bypass clap behind the supercharger? Or something else?

Hi so what the symptoms are for these p0410 and p2036 codes? I've just got obd2 Bluetooth thing and checked and I've got these codes but before I've checked I've never know that there is any problem with the engine. Is it worth trying fixing this if everything seems alright? Thanks guys

I've been cleaning this valve on my car since 2008. I realized that cold start surging was caused by this valve sticking. I started removing and cleaning it randomly and then when I stopped, it started sticking and surging and losing power. Now I do it once a year. However, I lapsed and last cleaned the valve in 2013, now the valve stuck again while I was driving through the Alps. Was not fun at all to get up those mountains. Now I've got it soaking in carb cleaner downstairs, since the first clean a couple days ago worked, but it must have had so much sludge in there that it hardened again after the clean and stuck open. This design sucks, to be honest.

I sucked out the wd-40 out instead of blowing it out does that matter?

I have c240 model 2002 the car burn oil and smok suddenly ,i have only one. Fault p0400 exhaust gas recerculation. Plz help me.

thanks for the video,. thinking about buying one. would love to chat about the c230, want to get your opinion

Excellent video. Did it resolve the issue?

I have a 2000 Mercedes S500. Will this be the same issue? Awesome video. Thanks a lot.

The check valve intend to block reverse exhaust gas that extremely hot which could destroy shut off valve in short time. The check valve will severely clocked if your engine is abnormal burn fuel like running rich. The carbon deposit will build up faster. For me I think this design must be inspect check valve at least once per year. The most convenient is to replace it a new expensive check valve.

So if you have a Kompressor model Mercedes you don't have a smog pump?

Hi there, i have the same issue and after i erase the fault code i have a huge difference in power.I checked the valves and they are ok...now what can the problem be?Should i erase all the time the error or what to do? thank you so much