BMW 328i Secondary Air Injection System Testing P0491/P0492

[@markp1016]

I had p0491 on my n51 e92, and code remained even though got a new air pump, new check valve, and new hose. Found out there was moisture in my hose that was messing up the flow. And triggering the code Fox was: removing both hoses connected to secondary air pump, Spraying a little isopropyl alcohol into the pump and both hoses. Let it dry. Been good since then.

[@miguelangelfloresflores5409]

THANK YOU!!!! I didn't know what kind of tool to use!! I was going to use a wrench,,, yet,, it was hard to get to!!,,, I got a wrench!! Thank you again, BOSS!!!!

[@valerianpantsulia1730]

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

[@sipmeister3611]

Appreciate the knowledge ive had refurbished a air pump it it working but making an clogged exaust noise I assume it’s this thanks

[@perspolis1818]

Excellent video. Professionally done

[@derekrostock1596]

Thank you for this video! Question. I’m building a 128i track car and will be deleting anything not essential to performance. Do you know if deleting the SAP will decrease performance either by messing with AFR’s via the O2 sensors or the DME somehow cutting power? Just curious if there are any negatives to deleting this other than emissions. TIA! Cheers

[@El_El_Guapo]

Hello, thank you for the video. I can blow through mine, but I am met with resistance and have to blow pretty hard. Is that normal or should the air blow freely

[@jomartacut3559]

Same problem here. Is this normal or a sign of faulty valve?

[@El_El_Guapo]

@jomartacut3559 mine was faulty. I spent a lot of time and effort into cleaning it hoping to unclog it. Reinstalled multiple times and retested, nothing worked. I ended up buying a new one. Strangly the new one seemed exactly the same, but cleared my code. This was a total nightmare for me. If possible, save yourself the trouble and just buy a new one. Don't go to pick and pulls because if you do find the correct valve, I guarantee it will already have been tested and is faulty. Good luck.

[@jomartacut3559]

Thanks much. I’am having the dealer look at it as its under sulev warranty.

[@ArieteArmsRAMLITE]

thank you for taking the trouble

[@JoseGarcia-br3uh]

How you clean the air ports ?

[@sergioferreira3589]

Hello. Good video My ports are clogged in the head. Is there a way to clean them without pulling head out. Ty

[@jaxonhundertwasser3068]

Hi, we’re you able to figure this out? I may have the same problem with my e90

[@nahtannoJv8]

any update on this?, one of my ports are clogged as well. I am letting it sit overnight with crc carbon cleaner to see if it helps. I am at 156miles so no SULEV warranty for my N51

[@dferrari888]

@@nahtannoJv8 Did the CRC carbon cleaner work for you?/ did you spray it directly in those two holes there with that valve disconnected?

[@nahtannoJv8]

@@dferrari888 it didn't work, and I did spray it into those two holes

[@scytrex9694]

@@nahtannoJv8hey, did you ever fix the problem?

[@donaldwhiteman3224]

Beutiful video

[@BeemerReborn]

Mines had burn oil in the ports, I sprayed parts cleaner and ran a brush through it and now I don’t get that burning oil smell out the exhaust when the engine gets hot.

[@leo4870]

I have a p0492 code what’s the most likely to be the pump works the valve has been change relay is good

[@Chris-wp3ew]

HI there... Is that the secondary air injection valve or the EGR valve? I'm looking to replace the EGR valve and multiple sites shoe that exact part as the EGR valve. I'm so confused...

[@kyhomegarage3430]

It’s secondary air injection valve.

[@xsil20x]

Hi I’m having same problem with my 08 e90 as the ses light is on for secondary air pump insufficient flow bank 2. I’m curious how did u clean/unclog the air ports ?

[@jaggercole8878]

you probably dont give a damn but does anybody know a method to log back into an instagram account?? I somehow lost my password. I would love any assistance you can offer me

[@daxtonharrison8208]

@Jagger Cole instablaster ;)

[@jaggercole8878]

@Daxton Harrison Thanks so much for your reply. I found the site thru google and im in the hacking process atm. Looks like it's gonna take quite some time so I will reply here later with my results.

[@jaggercole8878]

@Daxton Harrison it worked and I actually got access to my account again. I am so happy:D Thank you so much, you saved my account !

[@daxtonharrison8208]

@Jagger Cole glad I could help :D

[@smooveking773]

Mine has zero air flow can i soak it in breakcleaner or would that even work

[@kyhomegarage3430]

Smoove kings I don’t think it would. Just get another one.👍

[@smooveking773]

@@kyhomegarage3430 okay thanks

[@radekskreczko]

my ports are clean, changed the pump, changed the hose, check valve is working as I tested it like in this video and still check engine light is on, I don't get it is there something else part of the secondary air?

[@kyhomegarage3430]

Does your pump actually runs. Do you hear it when you first start your car?

[@radekskreczko]

@@kyhomegarage3430 yes it does

[@jaxonhundertwasser3068]

@@radekskreczko Did you find a solution to your problem? If so, would you are to share? I have a similar problem and I can't seem to figure out what the issue is. Thanks in advance!

[@radekskreczko]

@@jaxonhundertwasser3068 no I did not, I have the check engine light on, but emissions are do in 6 months, I will take it to a mechanic in a month to fix that, I'll post once I get it fixed... Did you get to the solution?

[@jaxonhundertwasser3068]

@@radekskreczko yes, I did! If your issue was the same as mine: P0492 (or P0491, but not both): I bought an O2 sensor safe carbon cleaner with an extra long hose + a sheet of cork gasket material. • Take off the secondary air valve. • Cut the gasket material in the shape of the secondary port and poke a small hole for the hose of the carbon cleaner. • Get the hose as deep into the secondary port as possible and blast the carbon cleaner. You’ll see the carbon accumulate along with the fluid at the entrance. • Let the cleaner evaporate and clean out the carbon. • Repeat (even turn the engine on intermittently while the secondary valve is off to ensure all the carbon flies out and to burn some of excess fluid). Bonus: carbon clean the secondary air valve in the meantime. Hope it works!

[@oshinaslanian3221]

Ramon, why were the oxygen sensor voltages so high? Is that like a European thing?

[@kyhomegarage3430]

Hi my friend this car uses AFR or wide band air ratio sensor. You will see these type sensors more often in future. Any car manufacturer are using these sensors now. 2.00V is lambda 1. Voltage above 2V will indicate lean and voltage below 2V indicate rich condition. I know this is confusing. They are different from O2 sensors. Hope this help.

[@oshinaslanian3221]

KY HomeGarage Got it, I thought it was just a regular 0 -.900 oxygen sensor.

[@denstylerzofficial]

so as u tested the valve is it means GOOD valve?

[@kyhomegarage3430]

DenStylerz Official - Best Mixes yes sir this is good valve. On this car exhaust manifold port was clogged up. Cheers

[@denstylerzofficial]

KY Home Garage KY Home Garage and if the air flows 2 directions ? Help if i cleaning?

[@PJR1234567]

@@kyhomegarage3430 hello, how did you go about unclogging the ports?

[@kyhomegarage3430]

Paul R. I used screwdriver and wire brush. Nothing special you just need to clean build up of carbon deposits .

[@TheRedcroatian]

@@kyhomegarage3430 thank you so much for this info, I believe that my problem. Last time I took it off I saw tons of carbon build up but didn't bother to clean it. I just bought new gasket because the old one looks run down but I think carbon build up is the actual problem. BTW, I have a 2004 330xi but same principle!

[@HighIntentions-]

There is white smoke coming from my vents as soon as I turn my car on, I opened the hood and it is coming from that same side. Is it possible that may be the reason why? Because I have to change that part or maybe something far worst?

[@kyhomegarage3430]

Do you smell burning oil. Most likely your valve cover gasket is leaking and engine oil is dripping down onto hot exhaust.

[@luisbg8319]

Disculpe amigo, a la valvula de mi bmw2003 325i le soplo y no sale aire por el otro lado. Y me arroja estos codigos p0491 y p0492.

[@gabrielmarquez5784]

Que isiste para areglarlo???

[@RodriguezSteve]

@@gabrielmarquez5784 Replace your secondary air pump

[@gabrielmarquez5784]

On mine it says bank 1

[@angelatrujillo3682]

I have code p00bc , p0171 and p140A

[@coolexperiments205]

did u find out what the p140a code was for?

[@usace69]

اول مرة اشوف عربي يفتهم !!

[@jcoach3064]

I can’t blow through mine at all

[@SubliminalMessagesTV]

Hope you replaced it by now lol

[@jcoach3064]

@@SubliminalMessagesTV 😂 replacement for what I just deleted it it's incredibly pointless piece of metal and took out my own headers put in catless headers and straight piped it

[@El_El_Guapo]

I can blow through mine, but I am met with resistance and have to blow pretty hard. Is that normal or should the air blow freely?

[@jcoach3064]

@@El_El_Guapo I ended up deleting it,just remove ut its pointless really