Secondary Air Injection Systems on German Vehicles

Description and operation of secondary air systems on VW, Audi, BMW, and Porsche vehicles.

[@truthbetold8425]

To trouble shoot try this: Step 1. Trace the vacuum line from the secondary air pump valve (mounted to front exhaust port) back to the vacuum solenoid located at very rear of engine (you will need to remove the air cleaner box assembly to do this) and confirm no broken or leaking vacuum hose; Step 2. Unplug (the same vacuum line that you just check) from the secondary air pump valve (valve is bolted to the exhaust port on cylinder head). Step 3. Start the engine when conditions are present that secondary air pump runs (cold engine). Step 4. a). If there is vacuum flowing through the vacuum hose that runs to rear of engine, that then stops flowing when air pump stops running, then the issue is the secondary air valve bolted to cylinder head. b). If there is no vacuum while the air pump is running, the issue is the solenoid, or broken vacuum line running from solenoid to intake manifold. Check Vacuum line is OK, replace solenoid. NOTE: To check if vacuum flowing through vacuum line, use smoke source.

[@sgudino1]

Great breakdown. You rock. I was having a code appear after a timing belt job from a shop. You guys broke down what the parts looked like and where they connected that when I went out to the car and investigated I discovered that the shop had left a hose disconnected. Saved me time and money from them having to do anything and me having to go on my free time and sit around as they look for the problem. Thanks again, keep it up.

[@bbstacker70]

Outstanding video. Thank you so much for posting.

[@jwagner1993]

Video is awesome. The system is absolutely stupid

[@lesblumling5614]

Great concise tutorial-THANKS

[@W.Khairi]

Great explanation, Thank you.

[@davidhall3747]

Great Tutorial on Secondary Air Injection System. Its the best by far I've seen. We own German Vehicles- and this tuturial will help with the Diagnostic/Troubleshooting of our fleet. Thanks a million.

[@PGGraham]

This was useful to me. My output hose was broken. (2.7l twin turbo. The output line splits. It was broken on both sides. Someone tried to fix it - poorly.) My only suggestion would be to show some pictures of the system in-place.

[@GermanAutoInstitute]

We're a theory site, not a repair manual. I recommend buying the factory Bentley repair manual for things like that. I'm not sure if you have an S4, or an A6, or an Allroad, but they secondary air system is different in each vehicle, I think the S4 doesn't even have it. The Allroad the pump is down in the back sort of under the intake manifold, and the kombi valves are on the back side of the head so it'd be very hard to show it in place. That's why it's useful as a mechanic to understand the theory of how the system works, because once you do it doesn't matter WHAT German car you're on, whether it's a VW, BMW, Audi, or even a Porsche, they all function the same, the parts may be slightly different but you can deduce how it works and how to fix it. I know it's probably WAY too late but this heat shrink tubing here is the best way to fix it. Some 2" heat shrink even has glue in it. You can put hoses back together that are missing large gaps even. www.delcity.net/store/Triple-Wall-Tubing/p_330.h_77221

[@GermanAutoInstitute]

It varies so much from application to application it would possibly be more confusing. Some of them have kombi valves with vacuum disphrams and a vacuum solenoid, some of them just blow open from the airflow of the secondary air pump, some of them have electronic kombi valves that use an electromagnetic solenoid to open. They all function the same though. I probably could stand to talk about how to repair them. There's some really big heatshrink tubing that's very heavy duty that not only does the job well but looks kind of OEM when done as well

[@btnerual]

Great information, straight forward informative brake down. Thank you

[@babisfoititis]

Checked the combi and its fine..vacum all ok..secondary air solenoid works..i have no power to the air pump..it just wont start in the mornig.I have vacum on the combi valve and its opens when cold (i can hear the exaust if i unplug the hoses from it) and closes fine when engine warms up. Could it be a relay? I have no leaks from the solenoids and hoses, not even from the pump. I think my problem has to do with the power. Any sugestions?

[@davidhall3747]

Check the Relay and Fuse feeding the relay. Without a Wiring diagram- you will be lost.

[@williamschuyler6294]

What if i disable and remove this part, how will it effect my engine other than throwing a code

[@jenniferboudreau9366]

I heard that there could be a smell/stink of hydro carbons into the car. I’m sensitive to the smell and the noise on start up so I’m replacing mine.

[@OverlandTT]

Great info, any idea why both of my air pumps will have stopped working after they were disconnected during the coolant pipe upgrade on a 2004/5 V8 Cayenne?

[@solidpnoy]

Nice! My MB threw a 0410 code and upon further inspection...found the hose that cross between the 2 kombi valves to be split almost in half.

[@RLTPDX]

ready I already put some new spark plugs and ignition coil. Still have the same problem Code : Random/Multiple Cylindre Misfire Detected P0300 - 008 - Implausible Signal - Intermittent p0302 - 008 It is not dripping coolant by the spark plugs, I mean they are dry (As it should be) Audi 2004 A4 Quattro 2004 1.8

[@tullgutten]

try unplugging the air mass sensor, it will go in emergency mode and if it runs fine reaplace the air mass sensor, this just happened to my car some days ago and the engine did stall completely sometimes

[@JCTHiking]

I'm sure. It hasn't failed yet, but it does sound like a jet liner when I start it in the morning. It runs for about 30 seconds then stops.

[@test-sf9uj]

Thanks, helped me understand the system and diagnose my issue with VAG (ended up that mechanics swapped two relays when I had a lot of issues with wiring)

[@hamidlogari1]

I have GL 450 2015 looks the water the secondary water pump doesn’t work. I touch the water reserve it cool but my car is at high temperature. Can you explain why is it like that. I replaced the water pump.

[@raphaelsargeant7034]

How you doing? I have a 2005 mercedes ml350 w163 , my problem is the P0410 secondary injection pump circuit malfunction, the pump runs or blow air with wires from the battery , the electrical connector has ground . My problem is there's no continuity from the pump electrical connector to the 40 amp fuse , my next test was jumping pin 30 and 87 the pump does not run , pin 30 has over 12 volts pin 87 has No voltage when jump or trigger. Thanks

[@jwagner1993]

Another thing, u can find these pumps on any junkyard with VWs. I bought one very good per 20 dollars

[@nathanielholloway8267]

😤 and I swapped my Jeep Grand Cherokee for a Audi..and now I got this problem😡. Stick to American.

[@patiencemorrison1231]

Hi, please can you help me solve this problem. i scan my 2.5 vw jetta mk5 with vcds scan tool. i had this error code: 005170 - Secondary Air Injection Solenoid Valve (N112) P1432 - 004 - Open Circuit. what could be the problem and how to solve it. thanks

[@illusion2055]

My engine is running fine, but I do have the check engine light on for this reason. I am going on a long road trip, will I be affected?

[@JoaoCosta-pb1vd]

Que grande video 👍 boa explicação, obrigado 👌

[@rickperry3969]

I have the famous P2432, I replaced the sensor on the line coming from the Secondary Air pump My pump runs 100% I get code on VCDS P2432- 002 Short to Ground Secondary Air Inj. Sys. Flow/Pressure Sens Bank 1 I have 4.2l FSI V8 I am assuming it’s the bank 1 sensor - the left sensor of the 2 sensors next to each other with small Vacuum lines from Kombi Valves I appreciate you guys for helping out

[@johne6081]

I had to fix my SAI system (2001 VW Passat wagon, 1.8T) to pass California smog. Replacing the somewhat carbon-clogged combi valve eliminated the check engine light, but the readiness monitor never cleared to 0 (ready). On cold start, I found no vacuum at the combi valve vacuum control inlet hose, but vacuum at the "F-hose," which pretty much pinpointed the SAI control solenoid valve under the intake manifold. I replaced it, and the discolored and stiff silicone vacuum hose connect the two, drove a 10-mile loop with a couple of decelerations from 45 mph and 3 restarts, and I was ready for my smog test. :)

[@JerZeyFiveOh]

Thank you for explaining your process on how you fixed the infamous SAI system on VW/Audi platform. I also have AWM engine code 2001 Audi A4 1.8T and lived with the infamous P0420 SAI system fault for 13 years. I never studied the SAI system because in NJ you are allowed to have one readiness monitor not complete and NO check engine light. I had a general idea that the n249 valve (SAI control solenoid under the intake manifold was the culprit since mine are original to my knowledge, I am ready to tackle and finally fix it for good.

[@johne6081]

@@JerZeyFiveOh Easy test of that control solenoid valve: disconnect the hose to the control port of the combi valve, put your thumb over the end of the hose, do a cold start, and check for vacuum. No vacuum (my case) --> leaky vacuum valve portion of the solenoid control valve.

[@JerZeyFiveOh]

@@johne6081 I will definitely do a test! Thank you for the tips.

[@tankprotect2746]

Hi, please can you help me solve this problem. i scan my 2.5 vw jetta mk5 with vcds scan tool. i had this error code: 005170 - Secondary Air Injection Solenoid Valve (N112) P1432 - 004 - Open Circuit. what could be the problem and how to solve it. thanks

[@vitocoppolecchia4243]

Where can find info on bad rough idle on A4 B5 1.6 ADP motor 1995?

[@JUKE179r]

Working on my 2001 Land Rover Discovery's SAI pump brought me here. Great info. Cheers!

[@michaelhiggins7365]

Wow! What an incredibly well done video! Thank you !

[@jameswan670]

Hi. Secondary air pump issue will be caused by P0430? If catalytic converter is clogged, then this pump will run continuely? My pump does not off even after starting of car for 20min

[@valerianpantsulia1730]

After all..........God Dammit today's BMW brand///// Nice video and Good job, it was very interesting. Thank you ////////////////////

[@HardWhereHero]

Can you clean a Kombi valve that's stuck open? I stuck some rubber gloves on my jetta and with it shut off the valve should have been closed but the gloves filled up quickly when I jumped the secondary air pump. Thinking that the valve is corroded and stuck in the open position.

[@YiZuSc]

Can we spray carbucleaner thru the kombi valve and selenoid (Of course, first disconnecting the houses and harness) without unmounting?

[@lannyzuniga723]

I have a check engine light on my 2000 vw jetta and it was code p0411. I bought a new air pump and put it on and the check engine still came back . I need a smog test too. I bought this used car. What should I do? What can I do?

[@transam8607]

I have an 08 Jetta 2.5 and the secondary air pump keeps blowing the fuse I'm not sure weare the pump is located I think it's under the intake manifold if someone knows please help

[@Lehmann108]

Great video and clear explanation, but you have to stop saying "oxygen" when you mean air. There's quite a difference between the two!

[@magellanmax]

Good vid! I'm curious, my 99 A4 B5 is popping up two codes; P0422, which I'm assuming is a secondary O2 sensor issue and P0441 which I also checked and turns out to be a Secondary Air Injector issue. (hose) I guess my question is; Can the SAI problem also trigger the P0422 error code?

[@GermanAutoInstitute]

The p0422 means your catalytic converter itself is faulty. P0441 is evap system incorrect purge flow...there's a small solenoid called an evap purge solenoid by the air filter housing. Google B5 A4 evap purge solenoid. Then find that on your car, remove the vacuum hoses to it and tap it on white paper, if black stuff comes out the charcoal canister has contaminated the valve and that's charcoal stuck in the valve. That's why you NEVER want to top the fuel tank off after the pump shuts off, it fills the canister with fuel and the charcoal then leaves the canister. Your faults have NOTHING to do with SAI at all. I do performance tunes, if you want to message me privately, if your A4 doesn't have a throttle body cable and it's just electronic I can tune this stuff out.

[@rafaelmata4601]

magellanmax

[@rafaelmata4601]

magellanmax

[@aaronmarsh9667]

magellanmax M

[@Sugarmel857]

My 2001 528I gets a P0492 code but not a P0491. What should I look for?

[@Thelastmistake]

10 q5 3.2 ,swapped driver side head ..the new head doesn't have the port to connect the SAI. ..can I bypass the head and just drill a hole in the exhaust manifold? car runs good exept it throws a code fo insufficient flow detected. would that solution make it for the code not to set again? thanks in advance

[@burningwolf05]

I'm hoping you might be able to help me. I have a 09 Jetta Gli with cali emissions and i got the error code p2432 which is the secondary air pump sensor. I have found plenty of threads talking about it but nobody really has said where the sensor is located. I can get the sensor from work no problem but I don't have any idea where to start looking.

[@ryankilstrom2909]

Any idea what the standard vacuum measurement is for the Kombi valve to open? My 01 Audi TT provides a vacuum when it should. It's a bit weak, but the smoke test came out with no leaks. The valve opens with a Harbor Freight vacuum hand pump at 13 mmHg, but the car only registers 6 mmHg, when I hook the hand pump up to the line to measure it. Not sure if my valve has gone bad or something else on the intake not creating enough vacuum. Any help would be awesome. Thanks.

[@socksonfeet8125]

How Do you test the valves that do not have a vacuum line out?

[@jrch6487]

Where can I buy the hoses I have this problem on a 2.5 Rabbit I'm having a hard time finding the hoses please help

[@bayfinest1938]

eBay

[@nettespankins260]

L Yeah

[@WR-yo8ir]

Great explanations .... 🙏🏻🇸🇪

[@martincastaneda6429]

I have a bmw z3 is a 2000 I have the check engine light on I went and they said at outozone is the ECM detected too much secondary air injected can u help me I don't know wat is that

[@fockyoumang]

I subbed, but should I take the combi valve off and run the engine first? What order should I start troubleshooting? It does it all the time while sitting in traffic, clicking turning on and off over and over again sounding like a vacuum cleaner, and on a 95° day, sometimes very rarely it will stay off but that's usually when it's very cold out, around 20° or below. Also I don't know if this is a symptom that could help diagnose but when the pump turns on and off, it sounds like a vacuum cleaner then when it shuts off the idle gets to 800 rpm and there's an ultra low vibration in the car that you can feel rattling your brain and popping your ears but can't actually hear the sound. I'm getting so frustrated that I just want to junk it, not really. It has a built head, cams, valves, springs, port polish, head bolts, stock block, forged rods. I just want a golf 4 door with a ABA block, I'm so done with it right now. Entire suspension, hubs, knuckles, BORA conversion, tuned ECU/ECM, cross drilled slotted rotors with ceramic pads, coilovers, all new pcv hoses, air pump hoses, coolant hoses and water spout from head and y hoses and hoses to coolant tank. omg it's insane, one thing after another, over and over again. Anyone want to trade a 02 337 for a MK4 Golf 2.0L ABA. It needs a few things like valence and interior trim but when it runs right it's like a beast, it has taken every car that's ever tried to test me. Could it be the wastegate actuator or wastegate flapper is stuck or not closing? When I drive really hard it moves but when I come to a stop there's no power or boost, and I turn it off and on and it's fine again. what's the deal? I know it's something stupid because the engine was fully rebuilt less than 1000mi, probably half that. Oh yeah, it has I tiny pinhole exhaust leak at the muffler delete, that's probably the ultra low frequency sound.

[@GermanAutoInstitute]

a lot of what you're saying probably needs a scan tool to diagnose. The pump shouldn't run when the car is warm. And the reason it doesn't do it when it's hot out is it doesn't run over a certain intake air temperature. So the most common issue if the pump is running is the pump is split in half, it is riveted from the factory, look and see if the rivets are allowing the pump to pull apart. You would then need to drill the rivets out and use small bolts from the hardware store to screw it back together.

[@jrnz0r]

Do diesel engiens use secondary air injection system?

[@jorarr5174]

Would this pump not working cause my car to hesatation when accelerate

[@moma0211]

Can this incrase power of little 1.6 mpi 8v golf v

[@djolecar88]

Great video man. I will work on my 2000 VW Passat 1.8T ATW with code P0411 and see what is off! I hope it is just a bad hose but we will see!

[@FatbardhVrella]

I have a question for you on my 2004 Audi A6 2.7t S-Line , I delete the catalytic converter and i want to know if I need any more this air secondary pump or I can just delete it ?? I saw some people the put plate on cylinder and delete this pump do you thing if I delete it is going to do any different on Gas Mileage since I don’t have catalytic converter anymore ?

[@GermanAutoInstitute]

if you deleted the catalytic converter then you do not need secondary air, secondary air just heat the cat up faster so it is pointless after you remove the cat.

[@awuduissaka6894]

talk a little loud! so we can hear you.

[@tamiibrock6176]

Can you help to locate the secondary air injection pump where it located.

[@piotrhajzral4249]

I got an a6 1999 with a cracked secondary air pipe thingy on the left side in your video. Could this be a reason for a missfire and loss of power? My car is a 2.4 v6 a6 c5 and runs rich i think as it backfires alot and fuel consumption goes up signifcantly. The missfire happens always most when going from cold to warm engine then kind of lets go after 10 km or so but leaves me with crazy backfiring and decrease in power very annoying i must say also the idle gets rough and bumpy when warm as well as stalls if i dont give it a little gas on start. But it starts great on cold. guidance/help much appreciated

[@timmyjumbo4262]

It burns excess fuel during a cold start. It shouldn't have anything to do with anything miss firing. Check injectors spark plugs computer and possibly wiring.

[@denstylerzofficial]

my secondary air pump does not stop after 90seconds... is that possible?! what is the problem?

[@davidhall3747]

Terminal 87 and Terminal 30 could be stuck closed on the Relay feeding the Secondary Air Injection Pump. You might want to get that fixed- so you don't burn up your Pump.

[@aliqadri4672]

Bro does it work only when engine is cold..?????? Plz plz reply

[@opie7257]

Anyone know where the air pump is located on a 2010 VW CC 2.0T? It appears to be it may be in the driver's fender area as I see lines coming and going from that small area behind the headlight. If so, how do you access?

[@jlbueno0611]

Remove the tire and fender cover , and access thru there and under it

[@zinahshakir9455]

my car is running bad,its like dead when I push on accelerator pad,I changed air flow sensor,secondary air pump solenoid,spark plugs and their wires but the car still same?2002 jetta,,2.0engine

[@dubautowerksvwaudibmwandpo6765]

Zinah Shakir Stop throwing parts at it, and get a scan tool from Ross-tech.com then we an scan and diagnose it. Lets start with what brand parts did you use? If you didn't use factory parts, then chances are you juyst made the situation worse. Especially with the mass airflow sensor the ones from the parts stores that aren't Bosch are bad right out of the box.

[@oleschmidt93]

Very easy to understand the process thanks to your video. I have a 2004 Jetta 2.0 that has a P0420 code. When I jumper the secondary air pump relay, air flows through the kompi when it should be closed. Any thoughts?

[@GermanAutoInstitute]

It's pretty common for the diaphragm to fail. If what you are saying is true, you also should get exhaust flowing out that pipe too.

[@David-bz8qz]

Awesome vid mate.. question..i have a peugeut 307. P0410 fault has been diagnosed bydealer as a problem with the air pump and valve...have been looking everywhere to find out what this valve was, because i am going to source new parts rather than pay dealer prices and tbink u have answered it.. The kombi valve...have a great weekend and thanks again👍

[@dinsdalepiranha2333]

Fantastic information. It is very much appreciated. My W12 Phaeton thanks you.

[@riccardocarbo2479]

What year of vehicles does this apply to, exactly?

[@jaiho314]

I hope you can help me please, my cable connected to the air pump is not getting any voltage I have replaced the 100 relay but still the air pump is not working. I hope you can suggest some thing, My car is audi a3 2006 1.6 bse engine.

[@GermanAutoInstitute]

So if you pull the relay out you'll notice the relay has terminals number 30, 87, 85, and 86. Where the pin 30 goes into the relay board should have battery power all the time, 85 and 86 one of them should have ground, and one of them should have power when the secondary air pump is supposed to be on, when that happens pin 30 and pin 87 are connected and it sends voltage to the secondary air injection pump. so if you have battery voltage to terminal 30, and you have power and ground to 85 + 86, then check and see that pin 30 and Pen 87 have continuity when the relay is energized and then own check out the wire to the secondary air pump from where pin 87 goes.

[@ohiomoney9227]

the big plastic one broke on me today is that bad and what is it called

[@bradwessels5425]

Thanks for this video. I have a 2005 Mercedes SLK 350 and noticed the usual slight whine only at cold start up getting much, much louder! Going to have hood open tomorrow b4 starting and run out and put ear by the secondary air motor. Fortunately no warning lights yet and the pump is right up front and top on right, easy to see and replace!

[@GermanAutoInstitute]

Except that they're often 600 dollars. Look and see if it's riveted together, the rivets start to fail and the housing seperates. Drill the rivets and by it together.

[@dustanflanagan]

Thanks for the great video. I have a 2003 Eurovan 2.8L 24V VR6. First start everyday (or after sitting several hours) regardless of outside air temp the Idle runs bumpy for about 90 seconds at 1300 rpm. Then it settles in at 800 rpm and runs great. Guessing the bumpy idle has something to do with the secondary air system. Any ideas what would cause this and anything I should worry about damaging letting it run rough? If I immediately turn engine off and then back on after first start it runs smooth without the 90 second bumpy idle. No error codes being thrown.

[@gabrielgillard1519]

That is very normal for a cold start, it happens in every vehicle I've driven in at least, again regardless of outside temperature. Essentially you don't have anything to worry about

[@lti134]

GM go back and completely redesign this system what a mess

[@estchu]

Good video. Clear and concise. What causes code p0491?

[@painkillergko]

Excellent info....

[@stephenponter874]

Two questions for you: 1. What is minimum intake vacuum needed for the Kombi Valve to open properly? 2. My problem appears to be the actual machined port in the head being blocked by carbon build up. Do you know what the best way to clean out all the carbon build up ?

[@davidhall3747]

No known way to clean the Kombi Valve. Needs to be swapped out.

[@Sandman1832]

Haha all this time I couldn't figure what that vacuum cleaner noise was when I first started my car and now I know. Usually only California cars required these, but I noticed my 2000 A6 has this and it is a southern only car. Must be they put this on all the German cars like the Audi, BMW and Mercedes. I wonder if they put these on the newer Audi like my 2014.

[@GermanAutoInstitute]

No, almost ALL 99 and up VW, Audi, and BMW have these. On cold start there's not enough air for the catalytic converter to start catalyzing. Remember when Chevys had smog pumps back in the 80s? That's basically what they were doing was injecting air, but since they were belt driven they robbed power all the time when they're just needed for barely any time on cold start. So zee Germans made it smarter. Since the lack of air but excess fuel that needs to be burned by the cat is a function of cold cylinder temps, it's not something that they just got rid of (the SAI system) as far as I remember they're still on everything.

[@Sandman1832]

That is great information, thanks for the reply mate.

[@crabbyjimmy1]

excellent video thx! I know now that over a few weeks of cold starts my blower was getting louder and louder and then nothing.

[@claudeladow2334]

That darn pump has cost us thousands of dollars throughout the life of our new beetle 1.8t.

[@davidhall3747]

We get parts like that from Pull- a Part. They're dirt cheap- come with a warranty. You just need to remove the part yourself.

[@Blankscr33n]

Thank you so much! Was wondering what that valve was and why theres vaccuum hose unplugged. Thanks to this video got it working again.

[@martine7777e7]

This pump is always on in my car and discharging my battery, what could be the problem? Thanks..

[@davidhall3747]

The relay feeding the Pump is more than likely stuck closed. Terminal 30 is usually Hot at all times on the Relay. If Terminal 30 and Terminal 87 are touching- the pump will never shut off. Terminals 87 and 30 are on the Load side of the relay.

[@muzairanwar]

Thanks for the video. Very informative.

[@rogersocalbeaches5734]

yea, there is no way this is working on my Audi A4 3.0. Silinoid, vacume lines, not even gonna try and fix thsi

[@fockyoumang]

I don't have a catalytic converter. It's one pipe with nothing. Not even h02 sensors. My pump keeps clicking on and off and on and off. It's driving me crazy, it's stalking all the power until I turn off the ignition and restart the car and it's fine again

[@fockyoumang]

it's a MK4 gti 1.8T AWP engine

[@GermanAutoInstitute]

+FockYouMang If you ship me your ecm I can tune your car for 200 bucks with antilag and setup for the catless downpipe.

[@9gUDy]

this system can be delete if it is delete it will affect something on the engine

[@stephenponter874]

Forgot, I have a 2003 1.8T AWP.

[@daviddunt9701]

I'm not getting fault codes but my pump is switching itself on when ignition is off, intermittently. But when it happens and I'm not aware its draining the battery. any thoughts why it is turning itself on. If I put the key in and start the engine the pump often then turns off, but turn the engine off and it comes on again? what can I check any fuse or relay?

[@daviddunt9701]

its an Audi A4 B6 Avant 3.0 Quattro

[@davidhall3747]

Sounds like the Relay is stuck closed on the Load side of the Relay. Not the Control side of the Relay. You need to know how to diagnose Relays to confirm whats wrong.

[@anwarsabah2447]

I do not have a check engine light or anything but in California, I have to do emissions test for smog and I can't get the secondary air injections to be ready for my emissions test. Same with the o2 heater. Any ideas???

[@GermanAutoInstitute]

You just gotta keep driving it. Bmw has no way to force readiness.

[@anwarsabah2447]

+DubAutowerks I checked the air injection system and I noticed that the switch that allows vacuum to the smog air pump curl works, but the vacuum does not work. I tested the switch and it works, but it doesn't vacuum when I hook it up

[@johnharris1862]

hey thanks for the video i have question regarding my 01 bmw 330 xi every time i go for inspection i get a rejected sticker because two tests will not run secondary air and evap when i dissconect the vacum line from the solenoid to the kombi valve there is no vacum do you think thats why it will not run the secondary air test? and what are your thoughts on evap and why my car will not run the test? thank you

[@GermanAutoInstitute]

There shouldn't be vacuum to the kombi valve unless the secondary air pump is running. If there's not at that time then there's something up there. Not sure with evap, it should run, and if there's not a fault and you haven't cleared faults recently it should run. You'd need a factory equivalent scan tool to go much further.

[@johnharris1862]

Thank you for you response im gonna have to take it to bmw because it needs to get fixed thnx again

[@brynamay8136]

great video explained everything in great detail amazing thanks

[@ivanalzul]

i have a code 2432 in a 2.5 passat 2013 i need any info about it

[@jikkugeorge1272]

Helped so much. Thanks pal..

[@maveric0738]

Great video. I’ve been debating to eliminate my secondary air pump and it’s corresponding components. Then I’ll need a tune.

[@RavingBob]

Thanks! With this info I have to decided to delete this trash from my engine bay. Great vid!

[@cgeromi]

Awesome video. I have the Sai system on my e46 with the check valve that is actuated by pressure from the Sai pump, not a vacuum line. I tried to blow into the check valve tonight and I cannot get air through it. Should just the force of me blowing be enough to push air through the valve into the cylinder head?

[@GermanAutoInstitute]

With your mouth or with an airline from an air compressor? you can honestly tell if the valve is clogged or not because the pump will kick on on a cold start and you'll sound like it's under much higher of a load will be a higher pitch noise and sound like the pump is struggling.

[@cgeromi]

@@GermanAutoInstitute thanks for the reply.. problem ended up being valve was in fact stuck. Freed it up with some pb blaster and has been working great.

[@henryt3441]

Thanks for the review!!!! Awesome job on describe the secondary air injection operation!!!

[@colinchandler6516]

thanks great video

[@mohamedhalawa3771]

Fantastic.. Thank. ❤

[@inee107]

which wires to power the pump?

[@rodwellmanyike989]

I need help on this

[@David_Watts]

Excellent video. Very descriptive and informative. Keep up the good work!

[@sacooper802]

this informative video deserves a positive comment..great job, i hear an air output leak when pump is on and now from your video i figure output hose is cracked or my pump housing at the rivets has failed, thanks again.

[@dubautowerksvwaudibmwandpo6765]

soupercooper Bolt it back together! Glad to help.

[@Joghtai]

Great information, thanks

[@davidnoorman3889]

Awesome job on this video A++++

[@VANGUARDIANTV100]

Thanks for sharing...excellent intel.

[@AirConditioned]

delete

[@GermanAutoInstitute]

Honestly, there's NO reason to delete this system, it warms the cat up more quickly to reduce emissions, it doesn't hurt horsepower, it's not heavy,. I'm all for just fixing the vehicle.