code 1416 aux. emish. controls

my check engine light has been coming on and off every now and then for hte last yr. finally read the code and it was 1416 Manufacture control aux. emiss. contols..what is this??? maf sensor??? i noticed the light would always come on after i messed with my air filter..k*n cold air intake..

there is a emissions vent solinoid between the cab and the truck bed. they are prone to going bad. a smoke leak detector is the best way to check it. if it is leaking it will turn the light on. check for other leaks in the evap. syatem too

u think thats it?

P1416
Port Air Circuit Malfunction/ (AIR) System Bank 2
what does this mean????

P1416

Port Air Circuit Malfunction/ (AIR) System Bank 2

what does this mean????


what yr/engine are you talking about !

what yr/engine are you talking about !

2001 5.3 v-8

Do you have air injection?

2001 5.3 v-8

lucky you! you got that california air pump ....this is special just for people where you live....

this air pump fills extra oxygen into the exhaust , this passes thru check valves one on each side of the engine...this then only on cold start gives the cat conveter the needed oxygen to rapidly remove hydrocarbons for the first 5 min of the cold start..


my truck does not have this B/S pump ...but my 96 impala SS does..

you must replace these 2 check valves , then see if the problem goes away....if not replace the pump...

do not replace the pump with out replacing the check valves, as these valves have rubber diaphrams that fail with this amount of useage and when they do the pump gets destroyed...I suspect your not pumping sufficent air and the O2 sensor is reporting this to the PCM/computer..

this pump should be mounted near the passenger side firewall area...remove the hoses ,,,,see water ? If yes these check valves need replacing ..

you can also run engine with the hoses off and see if the exhaust blows out them ..that means there bad..

thanx for the info anybody else have this problem or have had to do this fix??

i see where the hoses come off the air pump but where is the thing u are talking about on the firewall?

i see where the hoses come off the air pump but where is the thing u are talking about on the firewall?


I never said anything was mounted on the firewall.....

on the passengerside of the engine bay is the air pump location ..then on each side of the engine are these check valves...did you remove the hoses and inspect, troubleshoot as I recommended...?

do you have a manual ? any Idea what I'm describing ?

on each side of the engine off the metal tube that comes off the air pump i saw a big looking nut thing that look like it could have something inside of it..is this where the check valve is located?? what if i just left the valves out of it??

on each side of the engine off the metal tube that comes off the air pump i saw a big looking nut thing that look like it could have something inside of it..is this where the check valve is located?? what if i just left the valves out of it??

you have no idea whats going on here ..I suggest you have a repair shop handle this...these check valves are part of the programmed emission controls with your california vehicle..

if you have time and money you should purchase repair manuals and start studing on how these all work...

go to the part store and see what these parts look like ...if you have tools and the ability to properly use them this is an easy task..

if not go to a repair shop ..

I dont know about silverados but i have had trailblazers with the same code and since they are mounted on the frame they suck up water and grenade. I would check the pump first then move down the lines.

I dont know about silverados but i have had trailblazers with the same code and since they are mounted on the frame they suck up water and grenade. I would check the pump first then move down the lines.

like I stated with the air pump on the LT1 , the check valves fail this is where the water comes from...all that exhaust condensation gets ramed into the air [electric pump] then it shorts out or just stops...

these valves are only good for 10yrs and should be checked ever year for back pressure/water entering the pump....on the LT1 the air supply for pump is just in front of the MAF so the MAF also gets dirty ...as the exhaust gas goes into the intake which also throws other DTC'S...
I had to buy ac delco check valves because the aftermarket check valves by standard are only 5/8 inch dia..the OEM are 7/8 dia ..so the hoses did not fit correctly on the stardard manufacturers part..

with the pump it was 200.00 total...to fix....

i really think u are right about this..this last week we had 90 degree temps out and the check engine light stayed off..first rainy day came and it came back on....make sense to u jcat??

is this the check valve u are talking about? i noticed one on each side of the engine and they do come off the air pump and go into the exaust manifolds..let me know thank you very much.

is this the check valve u are talking about? i noticed one on each side of the engine and they do come off the air pump and go into the exaust manifolds..let me know thank you very much.

yes ! and make sure you use two open end wrenches only rotate the check valve ...hold the piping steady ...

What part do i ask for when i go to the parts store..the guy at the local kragon is an idiot...and at napa i'm sure they'd have to order it lol..so where did you get yours at?

What part do i ask for when i go to the parts store..the guy at the local kragon is an idiot...and at napa i'm sure they'd have to order it lol..so where did you get yours at?

advance auto has them or the dealership...the dealer wants 20.oo ea..advance auto is cheaper but lower quality ...

so what part do u ask for when u go to the dealership? i plan to go there to get the part i don't want any problems with it fitting..i will probably just do both at the same time..let me know thank you j cat

so what part do u ask for when u go to the dealership? i plan to go there to get the part i don't want any problems with it fitting..i will probably just do both at the same time..let me know thank you j cat


they would be called secondary air injection check valve..you must do both ,,but remember you may have to replace the pump as well. water entering the pump does kill it ...

see if the check valves fix it first ..