Today I got the engine light up and a scan revealed 16795 Secondary Air Injection System (B2) - Incorrect Flow

or Secondary Air Injection System: Incorrect Flow Detected : P0411

I am guessing this is a result of disconnecting the N249 so have cleared the code and will replumb everything in tomorrow :(

Today I got the engine light up and a scan revealed 16795 Secondary Air Injection System (B2) - Incorrect Flow

or Secondary Air Injection System: Incorrect Flow Detected : P0411

I am guessing this is a result of disconnecting the N249 so have cleared the code and will replumb everything in tomorrow :(

What you may have done is removed the vacuum line to the N112, which is the vacuum valve that opens the combi valve on the the head, to allow the secondary air pump to blow air in. That error code indicates that your secondary air system is not working, so i recon it's down to that valve, since it sits right next to the N249.

You should be able to get the secondary air working again. This picture should help you:

Yes I figured it was the N112 as well anyway its back to normal plumbing now so I don't anticipate it coming on again.

While plumbing it back in though I did make an interesting find which seems to have smoothed things out lovely but time is the teller.

You know when you look and think something is different, spent a moment scratching my head and then thought my coilpacks looked wrong somehow, pressed down on one and it slid down about 7mm. They where all like it even the one under the vacuum cannister :confused: don't know why as I changed the plugs myself back in March and know I pushed them firmly home.

Anyway so far so good but I will be monitoring them.

I had a remap and it hesatates and sometimes the remap dont work at all. Any suggestions

What map is it?

Mine is smooth as silk now. The cure? Well a very simple one for me luckily. Coil packs had popped up, I pushed them in and next day they had lifted again. Closer inspection revealed my plugs had worked loose and leaking gas was blowing the coilpacks up causing a splutter as the boost came in on part throttle. Don't know if the loss of compression or the bad coil/plug connection or both combined caused the hesitation but I torqued the plugs up to correct values and the coil packs have not moved since. Now the car is running fine with more power, smooth acceleration and better mpg.

Am currently trying Hitachi coilpack revision E, they are bolt down ones and they seem very good so far. Ordered them from vagproducts and recieved them today. No more pop up ever They have received favourable reports on other forums for reliability so thought it was worth a punt

Nice one Lex Dysia, how much did you pay for them? Im thinking about getting some. Thanks.

Nice one Lex Dysia, how much did you pay for them? Im thinking about getting some. Thanks.

£107.49 delivered from https://sslrelay.com/s74326199.oneandoneshop.co.uk/sess/utn;jsessionid=154713f703c6a3e/shopdata/index.shopscript part no 06B905115E Oh and a couple of quid for some M6 X 20mm Cap bolts

yes my car loves the lpg. i ham taking it bk for the 2nd time. they told me it was the mass air flow at 1st so i replaced it and it was better but im still gettin the miss fire wen i floor it. i have also changed the dp to a 007 and its still the same and the dp is not giving me the pzzzzz sound like it should. oh and thanks i am getting the diagnostic done again tomorow

Can someone translate for me ,please.

Can someone translate for me ,please.

why u not english

why u not english

Seriously are you english.

I need too know.

If you aren't then fair enough, you are then perhaps you could try a type something we can all read.

ok fatty. wateva u say big boy

I can help you if you want, but I have trouble reading your posts.:(

I went as far as replacing the N249, DV, Air Temp sensor in inlet manifold, 1 vac hose, 1 breather hose, 2 pressure hoses, air filter.....

All had no effect on 17705, and occasional reduced boost days!

So I cleaned the TB after all this, and now it runs good as gold! It's faultless now. I must have done about 5k miles since, and it's still fine. Smooth persistent power.

I've since fitted a boost gauge to monitor the inlet pressure, which should help me keep track of things. I've even trialled the APR stage 1 map, which hit a lovely 17psi peak, and things are still fine.

My advice would be to clean the TB before you spend any more cash on guesstimate solutions like I did.

Yep TB clean seems to of worked for me, so far so good! this is on a standard car, remap coming soon though.

My 17705 is back! After 6 months of freedom!

Looks like I'll be cleaning the TB again.

I guess it's just a standard service procedure now, to keep her sweet. Looks like the schedule is every 6 months.....

Now where did I put that can of carb cleaner?...

Ive got that fault code aswell. Maybe i should try cleaning the carb .ive had a smoke test and theres no leaks anywer

my 17705 is back! After 6 months of freedom!

Looks like i'll be cleaning the tb again.

I guess it's just a standard service procedure now, to keep her sweet. Looks like the schedule is every 6 months.....

Now where did i put that can of carb cleaner?...

wat is tb?

TB = Throttle body which is what you use carb cleaner on. There is NO carb on your car so don't bother looking for one Here's a link to help you How to : Clean your throttle body - uk-mkivs

thats worth trying . mite save a lot of money to if it solves it. job for tomorow ha

My 17705 is back! After 6 months of freedom!

Looks like I'll be cleaning the TB again.

I guess it's just a standard service procedure now, to keep her sweet. Looks like the schedule is every 6 months.....

Now where did I put that can of carb cleaner?...

Just a thought but have you ever taken the intercooler off to see what gunk was in it? I remembered this thread from a bit back http://briskoda.net/octavia-i/oil-smic-should-i-worry/115628/

If the throttle body is getting dirty maybe it would be worth tracing it back a bit.

I'm taking mine off tomorrow to fit the FMIC, gonna be interesting to see what its like.

Edited 14 November, 200817 yr by martziniuk

Maybe i should try cleaning the carb .ive had a smoke test and theres no leaks anywer

What do you mean by smoke test exactly, I ask because I can't see how that would prove theres no leaks. Unless it from inside the engine.

Sorry abit of topic here but when cleaning the tb is it necessary to use a vagcom for the Throttle Body Alignment or will it run its self in ? just a bit unsure weather to do now or wait till i have a vagcom.

What do you mean by smoke test exactly, I ask because I can't see how that would prove theres no leaks. Unless it from inside the engine.

thats just a name for it,i dont think its actually smoke but it is some form of pressurised smoke. it goes in the engine and if u av a leak it seeps out . mine wasnt leaking.they cleaned my throttle body but ive still got the hesatating. the code p1297 is still popping up

Forgot to post up again on this thread. After bypassing the N249 valve and all was well for about 2 weeks and gradually the symptoms returned over continued mileage... :( - at the moment the symptoms are loud and proud and I am beyond fed up with the car. I attempted to take the car to have the original map put back, only when they tried the car wouldn't start!!! So I am a bit stuck now, especially if my original map is lost doesn't work :(

I recently did a TB reset which I think improved the symptoms a little but didn't cure it - not sure if there is something related there, perhaps a sensor on the TB that's faulty? I'm going to reconnect the N249 as this obviously isn't the problem - I've ordered some di electrical grease to coate some of the electrical connectors, but I'm fresh out of ideas besides this.

If something is faulty with the car it would be pointless be going somewhere else for another map/remap costing £££'s - but obviously the way to tell would be to put the original map back on to see if the symptoms go - otherwise I'll never be certain.

have you tried a new maf mate as this was giving me hesitations but no fault codes worth a try :thumbup:

try to disconnect it first and drive without it connected as thats a default setting if it makes a difference then try a new maf:thumbup:

I'll give that a try mate - no harm in trying