Audi A4 secondary air injection system diagnosis and repair DIY by Edge Motors
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- Опубликовано: 12 сен 2024
- AUDI SECONDARY AIR INJECTION PROBLEM REPAIR
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WWW.EdgeMotors.COM
in this video we show you all the components, operation and diagnostics strategies of secondary air injection system of Audi A4
Edge Motors
service@edgemotors.com
845-269-3846
107 E Railroad AVE
West Haverstraw NY 10993
This is probably the best quality RUclips repair video I've ever seen. Subscribed
Seconded. This guy really knows his stuff. Well done.
After many years of this video posting...i.myself, still rate it the utmost best .. just too excellent ..Thank you love from Nigeria
Very helpful video I've been looking for a fault for some time and found the fault from your video
Thanks again.
Thanks guys, this is a great video. You did a really good job covering all the details and pointing out all the components was very helpful for identifying my a bad combi valve.
Nice job Thanks! ... you could probably cut out a lot of dead-air and unnecessary footage to get it down below 15 min ;) but this video will save individuals many $100's.
As someone who had no understanding of the secondary air system, editing any of this content would have been a severe disappointment.
Lithuanian? I have a friend who has the exact same accent...nice. Have the 16795 code and will check the system soon. Diagnostic says the fault is intermittent and points to the pump I believe. Car runs well enough though, even when cold. Thanks for the info. Well done.
Man what a great public service!! Thanks! You are one hell of a mechanic.... I have an '02 Passat 1.8t which is throwing codes PO442 and PO411. Are they related? Cant get inspected. You make it look easy, but this is one of the most difficult cars to work on that I have encountered. Thanks for your efforts and time.....
I have the same problem. Thanks to you now i know what to look for...
Good video - thanks!!! Pump is difficult to take out, but kept working with it as you suggested and finally was able to remove it. Took the bolts and rubber grommets off the pump prior to removing in order to get it out. Also did not put bolts on new pump until had put it on.
best DIY on this diagnosis and repair. done the whole thing myself and it runs perfectly. btw. I've got the BEX variant of this engine on my a4 b6 and the pump is more to the center of the bumper, its rotated and bolts are more obcured. other than that the repair process is the same. audi moved it because of the second IC this engine variant has got.
Nice video very clear explain thanks for the good information
Hey, great video! I have a question about the EGR/combi valve. I have a 2004 a4 b6 1.8t. I removed the combi valve and the adapter (the bracket it attaches to), and I noticed the engine block doesn't have a hole in it where the adapter attaches to. Is this common? Will it hurt the car and will everything function normally like this? The car seems to run good, but has a secondary air injection code. Eveything but the egr passed the tests. Thanks again!
Hands down the best
Great troubleshooting video, spot on for my issue. Quick question - are both the SAI pump and the fuel pump running on the same relay, 373? Thanks for the response, keep up the great work!
Thank you for this video. I have 01.5 B5 Audi A4 1.8T with the dreaded P0411 SAI code. This code is a nightmare and I never properly diagnosed ever because I am not professional mechanic, just a hobbyist. My situation is that the SAI pump turns on but I still get the code.
man where you operate i will take my car and its will be in the best hand.Thanks for your message
yep, I have the same problem - had a blown fuse + pump does not running... already ordered replacement.
2001 allroad
Hey man! Another great video broski, keep em up!
Excellent diagnostic. BUT ... would think the reason the 40 amp fuse is blown would be good to know as well ??... there must be another issue to cause the fuse to be blown ?! Maybe pump is worn badly and near failure causing heat build-up , or ...??? Again, good diagnostic though ...
When I disconnected my connector and hose from the pump they both had water. however my fuse was not blown. I know my combi valve is bad but do you also think my pump should be changed?
The car jerks when driving constant speed at highway. Gives the fault code P0411 but can it cause this? Or is it possible that MAF sensor is faulty but does not give the fault code? I just unplugged the sensor and car still turned on like no effect at all. Didn't drive it, though.
top notch video.
Hey bro!! i have a question maybe you know something.... i have boost leak, heavy steering, heavy brake pedal... and sometimes in the morning have rought idle .... so i did a leak test and it dont have any leak ...i change the HPFP,the vacum pump and the PCV valve... but still the issue.. so you think the issue is the secondary air pump??
Great video, thanks for posting!
Awesome video! I smashed the LIKE and SUBSCRIBE buttons like they owed me money!
Yuor the best
Awesome video!
Great video!! My situation: Audi A4 1,6 2002 motorcode: ALZ. Got a dianose made earlier with a P1423 error - so my Secondary air pump is not running on cold start (2 degrees celcius outside now). I took the secondary air motor out and it was full with water. I don't have a VCDS diagnose tool, so I checked the fuse, not blown. Checked relay (373) saw video how to check it with wires onto the battery, it clicks. Haven't check selonoid, don't know how to. So I checked if power was delivered to pump cable with multimeter, doesn't seem to be any power comming through to the pump... Can't see any visual damage to the cable wrapping when following the cables... Do you have any ideas?
+Jens Jacob Storgaard Jensen theck the pump it self if it works by applying power to it directly...
but if you had water in it, the combi valve behind the cylinder head is not closing, so you have to replace that .
If you take the fan relay off the car will start?
If I have the code p1423 can I drive the car still. I live in Hawaii and we don’t have any smog laws
Question: If there is water in the Air pump but somehow all the water was managed to get out, would the Air pump still be good to use?
It depends on how long the water stays there
I have a question if you have a slight leak from the exhaust manifold to the turbo housing on one of the three bolts that bolts the turbo to the exhaust msnifold do you think this is enough to trigger this code the p0411? I did a head gasket.and in the process of taking it apart one of the bolts broke inside the turbo housing and.I had to drill and retap it and I think I might have to redo it because it has a slight leak I can only see it on a cold start while the sec air pump is on because of the morning condensation then once the pump is off its off it stops like bubbling the moisture from the condensation I do not get any other codes and I have checked.everything else and its driving me.nuts any recommendations would help thanks
by the way the evap purge valve solenoid is constantly clicking and has like ,10-11 volts constantly and was not working and had a rotted check valve right after the evap pump bu the air filter and I changed out the check valve and its installed the correct way and I got the purge valve solenoid to work by twisting the screw inside it when before it was always.closed and not working so im like confused to as why I never got any codes before but now I do
Ok quick question i pulled off a hose going to the air injection pump and water poured out...now what all should i look at to replace? I know more than likely the pump is bad but I don't have the program you were showing to test everything so i don't know what else is.
most likely your combi valve is stock open. thats the shiny thing behind the motor... take it of and see if it is in closed state and apply vac to it and see if it opens...
If it opens then what else would i need to look at?
Helldron01
you have to make sure it closes...
What is the last part you replaced? Very helpful!!
that was a combi valve
I have a problem with a no start, my pump turns on and stays on along with my fan, I understand now from your video how to cut off pump but can you give me a idea of what to do about the no start, I have fuel pressure, I changed the spark plugs and I have no codes
Spark?
Did it gives u bad mpg bc of the Secondary Air Injection System ?
Same question!?
Can I use VCD-lite to do this or do I need the full version?
what if the pump is on even after I've been driving the car for a while, I turn off the car and the pump starts to run?
what do I do
I have a question ,whats the relay number for the secondary air pump inside the ecu, there are three,373,219 and 369 thanks
felipapa77 no one ever answers this question. I have the exact same relays. I'll be keeping a check on the follow ups!
Hi I have a 2003 Audi A4 1.8t 190 that has a P0411 code. A garage has quoted me £500 to replace the secondary air pump. I just want to make sure that this is the problem as I have erased the error code using a maxiscan scan tool and it takes around 2 weeks for the error code to come back again. I just wanted to check if it was defiantly the pump, or would the code come up as soon as I start the car after erasing?
all this code means, that the secondary air injection does not provide enough air flow. there could be allot of causes to that, including the air pump that the shop is telling you to replace. however does not automatically mean that the pump is bad like allot of shops suggest from just a computer scan.
so i cant tell you from the code if the air pump is the issue, or the only issue... there have to be some diagnostics done before determine if the pump is the issue. if you watch the video, i explain how to check most of the systems parts
2005 audi econ button stays on and no a/c what u think
question- i replaced the combi valve, n75, and SAIP and smoke tested the system. do I need to run vag com diagnostics in order to clear the code or can I clear using an obd2?
thanks
Yes you clear it with obd2 tool...
N75 valve is not a part of secondary air injection system...
+EDGEMOTORS thank you. the n75 does run a line over to the combi valve. I needed to replace it BC I broke it during another repair
my engine light is on, and i was told its the secondary air pump not working,. i check the fuse & it was blown..., i change it & it blows again!!!!!!! what do u think is the problem.,
***** most likely your pump is burned... or the wiring is short to ground somewhere..
check the pump it self if its working.
Hi, I have this same problem where I have water in my SAI pump. But realized that my air filter was soaking up water as well, is this coming from the SAI pump?
What kind of car is it?
2005 A4 B7 but with the same 1.8t as this. It's an australian spec model.
Well if you getting water in the air pump, it could get sucked into the air box....
The best
what if you hear a noise coming from that ?
lready 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
Very long time ago but did you ever figure out the issue? Also I have a 14' s4 and have p0491 and p0492. Misfire on all 3 passenger cylinders, could the secondary air Injection cause this?
where is the SAI relay located?
it is not in the ECU box... only thing there is the fuse
+mike k if you have an A4, its there... you have to pull the ecu out and if its auto you have to pull the tcu out as well
Thanks, it was under the ecu like you said... Unfortunately it seems like all the components are working... Maybe a wiring issue at this point. The ecu is also not throwing any codes although the air pump doesn't come on even in -20deg Celsius weather...
+mike k so if ecu does not throw any codes, why you looking for a problem that might not even be there???
nice !!
Hi mate I have a 2004 a4 1.8 turbo 190 Quattro I have code 0203 wot somrone told me it's misfire on 2 , I have changed spark plugs and coil but problem is still there can u help me pls cheers jason
Id need some more info, is it stock? Or you have some upgrades? Does it only happen at wot and on torque peak or other times too?
Yes its stock mate , at tick over its running ruff ,drive it wise over 3000rpm it goes put your foot down and goes but it then holds back.I've looked at some forums and someone has the same changed the ICM and was fine but someone else said could be one of the injectors its using a lot of water too a lot of clear smoke comes out the tail pipes only had the car a week got it cheap thou so was expecting too spend on it ,any help would be very welcome cheees
I have a 1997 audi A8 Quattro it is showing a code p1280 and I don't know what it is does any body know what it is
2013 s5 error p049100 . Im Trying to locate the secondary air injection pump/houses . Any idea where to search ?
What were your symptoms for the secondary air injection system code?
so what happen if I removed the secondary air pump? actually I did it and no change on the engine occur
You will have a check engine light on, secondary air injection is for emissions only. It does not affect how engine runs, only supplies extra air to cold catalytic to warm it up so it could burn in burned fuel more efficiently.
Привет а можешь на русском такие видео комментировать я слежу за всеми , впринципе с инглишем дружу и понимаю только когда медленно говорят
🌠🌠🌠🌠🌠
whats the cost on this ? i have the same problem
well it all depends on what is wrong with the system.
Ok I got it done for a 100$
carolina law
well that would mean that there was something very simple , like a vaccume line...
what hapends if i not repair that ?
you will not pass state emission test. and posibly way down the road will clogg up the cat.
tanks for your answer. !
Would be nice if you answered some questions on here guy..😑
I do answer questions everyday.
What’s yours?
This is probably the best quality RUclips repair video I've ever seen. Subscribed