Secondary air system - tips for troubleshooting - Motorservice Group

In most cases, a fault in the secondary air system can be identified by a scratching or whistling noise, or by the secondary air pump no longer working. In this technical video, we provide tips on troubleshooting and show how you can test the components in the secondary air system using simple methods.
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[@WA3TTS1]

Thanks for this video. I had checked vacuum lines to the solendiod switch and vacuum diaphram on the secondary air valve, but forgot to check whether the diaphram on the secondary air valve itself would hold vacuum with my Mighty Vac tester. Air output also seemed weaker than air input on the secondary air valve from the electric air pump, but some air was getting through with the air pump on at engine startup. Given your comment about being able to hold 690mBar, I think I found the problem as I only get momentary vacuum gauge needle deflection to about 5 inches and the vacuum collapses before the next hand pump cycle from the Might Vac to the vacuum diaphram vacuum port. Multiple hand pump cycles do not build vacuum on the vacuum diaphram valve. So the vacuum diaphram in the secondary air contro valve must have failed. Given this vacuum test result and your info, I will change out the secondary air valve before pulling the exhaust manifold for air port cleaning. Vehicle is a 2001 Saturn SW2.

[@interrobot1]

A very helpful video, thanks!

[@NorthernBandit1]

Generally speaking great information...thank you! 2002 P38A 4.6l

[@teegee3132]

I was hearing a exhaust leak when I started up my D2 and the noise would go away after it was warmed up..it was one of these valves making the noise.

[@saifal-busaidi9062]

Well done man 👍

[@LustfuII]

Very professional 👍🏽👍🏽👍🏽

[@ericxiong6582]

Very informative video.

[@Golo1949]

Very clear.

[@franciscoantonio7183]

thanks for the information

[@bigcraigz]

I have a 2001 Cadillac DeVille recently the secondary air pump sounded like a spaceship for like 15 seconds when I started the car finally it quit working so I replaced it. my car has a tube coming off of the pump that goes into my fender for exhaust but when I press the gas pedal smoke comes poring out of my fender. please help I can't figure it out. thanks.

[@nealjag3917]

thank you i no what to check now

[@kebruya]

Very helpful, thank you

[@DieterBohn]

Great!

[@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?

[@MrWtovar]

How would i know if the pump is blowing the right amount of air in a DIY occasion?

[@Alex-jp3ek]

I’ve replaced a new air pump & relay. Idk if I need a new secondary air pump control valve ? Or what

[@Marko755974]

perfect

[@BarakatBarakatt]

Thanks

[@krishunt9889]

barakat bara

[@truthbetold8425]

I removed my secondary air system check valve from the cylinder head and with vacuum hose and Air Pump attached. Cold started the car, the valve opens, and a high volume of air flows through the valve so no issues with the system. But my engine light is on and giving a "Secondary Air System Insufficient flow" code. I assume this must be carbon build up in the ports located in cylinder head. Also, I can hear the valve (when bolted to cylinder head) fluttering during the air pump on cycle which would be an indication of insufficient flow after the valve (in cylinder head.). How can I clean out the ports in the cylinder head of an e46 325i ?

[@mattmo1534]

I had the same error and it turned out one of the old plastic hoses supplying the engine from the air filter was cracked around the back. I would simply try to touch all around the hoses to assure you don't have a leak in the hose which would lead to an insufficient air supply.

[@SergioProdi]

Where is that relay located? My pump issen't working...

[@neocatharry2693]

Forgot to mention the air hoses attaches to the solenoid valve and air check valve. These hoses can be cracked or broken causing issues as well.

[@DieterBohn]

There is a separate video on this topic: kzbin.info/www/bejne/hpSTmIdqqt-JpLM

[@elguero172967]

Great

[@rejisheema]

I have the same issue O2 sensor wire broken problem I find after i replace new O2 sensor now fix everything working 👍 2nd air system leak fixed

[@alexjauregui1982]

Hey man I have question I have a 2001 BMW x5 no check engine light turns on but I secondery air smog pump wont activate it turn on but when u put scanner it show it's not activated . What should I do any 1 help me please

[@oeungmao1]

i have 97 bmw 328i an air injection pump is commanded ON (activated) only at cold start..morning or after 7 hours rest.

[@afz39]

Hi, I have a P0492 error code coming up. Secondary air Injection air system bank 2 mailfunction... 1 is it serious? 2 is it a easy fix?? Thank you. From New Zealand.

[@ceawatso1]

I have the same code on my 2003 bmw 525i. Did you ever get yours cleared? If so, what did you do?

[@afz39]

@@ceawatso1 the mechanics said its not serious. Can be fixed by removing the secondary pump. We left it as if is. Everytime it comes up I just clear of using my OBD11 scanner

[@deltaside358]

Your test made me make a mistake. I bought a new secondary air pump. at the beginning the airflow is low then it increases because the voltage or current intensity changes and stops after 90 " with the 12V battery test the airflow remains low. not only tested with a battery unless you have a DC generator

[@Randysfishingadventures]

Hello. What if the pump come on when car is off. draining battery. i have that problem.

[@Randysfishingadventures]

My problem is that the pump is staying on when i turn car off and i ends up draining the battery. Any solutions to this ?

[@juanto303]

What if I find water when I disconnect the hose at the valve?

[@DieterBohn]

Then either the non-return-valve does not "close" to grant "non-return"-function or there is an other leakage where water can get in.

[@robertpadilla8377]

I have a 2002 e320 mbz pump runs for about 40 seconds in morning then shuts off then comes back on again engine light comes on code 0410

[@christiehamilton6700]

What if your air pump doesn't click on when u start engine, but wen u check to see if pump works w external power source, it clicks on, what is my step?

[@iamstd2]

Check the control circuit of the pump. Something is keeping the pump from getting the signal to turn on. Check any fuses, relays, or switches. Also check input sensors that tell the computer when to send a signal to the pump. Sometimes it can even be a bad ECM.

[@DieterBohn]

BTW. the sec. air pump (SAP) only runs approx 30-60 seconds after "cold" satr. What means: if the engine is warm no SAP is necessary :-)

[@AmberlyGavin0906]

Oh boy I smelled that burning wire before mine gave up!.

[@manuelsanchez5586]

i have whater in my motor can bee tha secondary air pump

[@DieterBohn]

What means "water in my motor" - the motor is a big item. Ambient air contains a lot of water, much more than In the piston there ist the ignition, so every water will be "burnt" (resp. becomes steam)

[@PANELA.DE.PRESSAO.707]

🇧🇷🇧🇷🇧🇷❤️❤️❤️

[@Bassboy1972]

Screw the SAIS and buy the bypass. Dealerships want thousands to replace this system.

[@neco1562]

I AM AN AUTOMOTIVE TECHNICIAN

[@victoriafrasure148]

Someone hit me from the back now my car is making a noise maybe 2 minutes or less after start up 🥺😭 of course that person didn’t have insurance and I only have liability 🥺

[@menne36]

Sue them

[@calimero1569]

This video entirely expresses after the introdcution of Ecotec opel entirely sucks!!! Euro 0 1 or no car please

[@anthonymason9696]

Rreeeeee my ke

[@laquenttoussant806]

Why this video isn't subtitle?!?! Some deaf/hard of hearing mechanic so some research and need to understand how it work.

[@petrusjood7969]

good day i have a Audi A6 2006 2.4 it give me a P0155 and P0411 do not start what can be the prodlem