View Full Version : code 16795
cuprabaz
01-11-2004, 14:01
The engine check light came up, and when i had a look with vag-com this code came up:16795 - Secondary Air Injection System: Incorrect Flow.
Any ideas what may be causing this? the car is going great!! :confused:
just a guess, which way is your DV mounted?
I had this recently.
I need to replace my EVAP pump! (£300 from seat!)
I'm trying to source a cheaper one.
cuprabaz
01-11-2004, 15:15
I had this recently.
I need to replace my EVAP pump! (£300 from seat!)
I'm trying to source a cheaper one.
:-o
What's an EVAP pump??? :confused:
My dv is reversed but that won't have any effect on anything, as forge say there dv's work in either direction.
not the dump valve.
Don't panic it could be something different.
From what I've read the EVAP pump resirculates the fuel vapers/emissions back into the tank when you first start the engine (when choke is open).
When I start my car on a cold AM I can hear a screaming noise (I know the 20vt lump is noisey but this is obviouse) once the car is warm the pump is not used. so driving won't cause any damage (I think/hope)
cuprabaz
01-11-2004, 16:26
i removed my N249 valve a month or so ago and re-located the N211 which i think has something to do with this EVAP, not sure tho!!
I don't have any screaming noises apart from the exhaust!! LOL
Cleared the codes so i'll wait and see if they come back.
Uwe@Ross-Tech
02-11-2004, 02:51
Secondary Air and EVAP are two totally different systems!
Secondary Air works like this:
http://www.12v.org/engine/index.php?section=hw&sm=2nd
The 16795 code is very common on cars with the secondary air system. It's usually due to a cracked vacuum line, less frequently due to a bad kombi/multi valve in the system.
-Uwe-
Secondary Air and EVAP are two totally different systems!
Secondary Air works like this:
http://www.12v.org/engine/index.php?section=hw&sm=2nd
The 16795 code is very common on cars with the secondary air system. It's usually due to a cracked vacuum line, less frequently due to a bad kombi/multi valve in the system.
-Uwe-
Whooops
Sorry!
cuprabaz
02-11-2004, 09:25
I've replaced all the vacuum hoses except the one from the N211 to the silver regulator type thing at the right hand side of the rocker cover. (this line used to go to the KO3 actuator) it looked a bit shagged but i ran out of the new hose so i'll test it later!
Cheers UWE ;)
Kris cheers for the heart attack! :D
I'm a little clearer now! (thanks Uwe for the link)
Its not an EVAP pump I need,
It is a secondary air injection pump. (which is £300 from seat)
Uwe@Ross-Tech
02-11-2004, 12:34
It's relatively unusual for this code to be due to the pump itself.
-Uwe-
It's relatively unusual for this code to be due to the pump itself.
-Uwe-
I can't be sure that this is the exact code.
Hmm - my secondary air pump has developed a subtle screeching on cold startup. Its definetly the air pump or valve (?) as you can hear it spinning down after warm up (with associated pitch change in the screech!)
I'll plug in VAG-COM tonight and check for codes.
Thanks for the info chaps.
Regards
Peter
Seconday air injection pump.
£255 + vat + fitting SOD THAT!
I managed to find a second hand one for £100 inc delivery + 1 yaer warrenty!
(took 8 hours of searching the internet and about 50 e-mails)
Let me know how you get on with fitting Kris, from your description above ("screeming") it seems mine has developed a similar fault.
Cheers
Peter
I'm not fitting but I'll ask my garage for you.
cuprabaz
05-11-2004, 09:58
the light came back on last night, i've done around 200 miles since clearing the code. started the car moved it into the garage and switched off, it was omly running for around 30 seconds. Started again an hour later the the check light came up!
We've always wondered why the car sounds like a jet engine shutting down when switched off after only being run for a short period(under a minute)
Just checked for fault codes on mine - there are none. Also checked "readiness", "secondary air injection - passed". So maybe just a bearing on the pump on the way out? The thing is, if I blip the throttle slightly whilst the air pump is on - it really doesn't sound good :(
I'm wondering if its not related to the multi-valve thingy that controls the injection. Maybe this is faulty?
Peter
PS: edited to ask: Any idea where to locate the combi/multi-valve?
cuprabaz
05-11-2004, 14:50
Is the combi valve the N211 valve if it show you on a thread on here somewhere.
Do search for N249 removal, there are pics on there! ;)
I had this error, turned out to be a vacuum pipe from the inlet manifold had popped off.
Could hear a high pitch hissing noise at idle.
My car's just been in for a service and I asked them to take a look at the secondary air injection pump. Discovery was made that one of the pop rivets that hold it together had fallen out! I had a look at it, the housing was therefore leaking or touching something, thus making the noise. They kindly fixed it for me, and hopefully its now a goodun!
Thanks Jabbasport for excellent service :thumbup:
Peter
cuprabaz
13-01-2005, 12:06
on the ibiza cupra where about is the secondary air injection pump located? every single vac hose on the car has been replaced with silicone hose so that rules out the burst hose theory.
the code only comes up when the car has been shut off while the pump is still running and i've done 500 miles since the burst vac hose was replaced and sure enough the code re-appeared.
I on a leon its more or less under the washer bottle (ish)
I think you have to get under the car to see it.