Gambit

iTrader: (6)

ok so started getting this CEL the past couple of days on MY06 Impreza STI, it can be cleared etc but comes back on the following morning.

P2432 Secondary Air Injection System Air Flow/Pressure Sensor Circuit Low Bank 1

questions

- what part of secondary air pump system is it relating to?

- Is there a quick fix i.e. not removing and deleting codes?

- How much of a job is it to remove the system with engine, turbo, downpipe & up-pipe all in situ? i already have the blanking plates.

- being an early 06 (Feb) i have no barometric pressure sensor to worry about?

cheers

BrownPantsRacing

iTrader: (6)

Oh dear. I had this years ago. The fault codes don't always point to the part at fault.

The 2x valves are something like £300 each and the crappy plastic pump is £800 to replace. It can get very expensive.

I used the cosworth blanking plates and blanked the heads off, removed the system and had the codes turned off. Totally pointless system.

There are quite a few threads about this already if you do a search.

Good luck.

BrownPantsRacing

iTrader: (6)

To remove the pipes to fit the plates we had to remove the intercooler & headers to get to it properly. Good few hours work, but worth doing.

Gambit

iTrader: (6)

yeah had searched loads but getting a few conflicting reports about disconnecting, leaving everything as is, sensors, deleting codes etc

ideally id want it all out - so that might just be the way im gonna go!

BrownPantsRacing

iTrader: (6)

You need to blank it off. You can't just leave it all bolted on and just unplug it as the valves may open and let gas in etc or transfer heat that you don't want. If it's not being used the valve pipework should be removed and blanking plates fitted to the heads. I left my 2 valves in place on the top of the engine and just removed the pipework. So long as the heads are blanked and the codes are turned off you are good to go!

jazzyjembreaze

iTrader: (11)

As above , junk it

Gambit

iTrader: (6)

ahh see now we are getting somewhere! so you leave the 2 valves on top of the engine - electrical connectors remain plugged in also, or disconnected?

BrownPantsRacing

iTrader: (6)

Not sure that makes a lot of difference. Can't remember if mine were unplugged or not. I would imagine yes, unplug them & leave them in place.

Gambit

iTrader: (6)

i assume they are left just cause they are awkward to remove.

BrownPantsRacing

iTrader: (6)

One is easy, the other requires removal of the headers. Also not too bad to do mind you. If you remove them you'd have to make blanking plates for them too and it's just a lot of extra work that isn't needed.

So long as the heads are blanked off your fine.

Gambit

iTrader: (6)

spot on cheers

smiffywhu

I've got a replacement secondary pump off a 07 sti you can have for free if you ever need it.

Good Luck

BrownPantsRacing

iTrader: (6)

It's not normally the pump that fails. The valves start to stick open, closed or part open as they age & corrode. Normally a valve, but not easy to tell which one is failing.

JayBeach

Hi Smiffy,

You still got the pump hanging around? Will take it off your hands if poss. Turning into a big of a money pit at the minute so trying to source parts as cheaply as poss.

Cheers

Jay

Pepen

[QUOTE=BrownPantsRacing;11668736]Dios mío. Yo tuve esto hace años. Los códigos de falla no siempre apuntan a la parte que falla.

Las válvulas 2x cuestan algo así como £ 300 cada una y la bomba de plástico de mierda cuesta £ 800 para reemplazar. Puede salir muy caro.

Usé las placas ciegas de Cosworth y borré las cabezas, quité el sistema y apagué los códigos. Sistema totalmente inútil.

Ya hay bastantes hilos sobre esto si haces una búsqueda.

Buena suerte.[/QUOTE
]



good morning mate, I have the same problem in my sti. Could you tell me the codes of the valves and the pump so I can ask Subaru and make the purchase to repair my car. Thank you so much for everything

BrownPantsRacing

iTrader: (6)

[QUOTE=Pepen;12124274]I have sent you a PM.

See below:

Sorry but this was 10 years ago for me now. Also there are a lot of codes associated with the secondary air system, something like 20+ related and the P2432 code while indicates low air pressure to bank 1 of the secondary air injection system it doesn't always point to the part that failed. Could be either of the solenoid valves of the pump itself, all of which are very expensive. You are best getting this looked at by a specialist who will be able to tell you more accurately which part may have failed.

If you decide to blank the system off then you will need the 2 blanking plates that go on the heads, you will need to remove the pipework to these ports from the solenoid valves, the valves themselves you can unplug and leave in place as they should stay in the closed position and the air pump you can unplug. Then you need someone who can map a car to turn off all the associated codes that bring up the check engine light like P2432. There are lots.

Be careful when fitting the blanking plates to the heads, we had to remove my intercooler and complete inlet manifold to get to these and they can be very tight indeed. If one of the bolts snaps (which does happen easily) then the engine needs to come out. So get this done by a specialist if you are unsure and not fully competent.

Good luck.

smiffywhu

hi Jay.

Sorry this got checked about 3 years ago when converted garage to a gym.

Gambit

iTrader: (6)

just for the record. mine got junked and codes removed. The issue though as it turned out was a split in the hose from the pump to the valves. The split in the hose was where it split to the 2 banks.

item number 2 in this schematic
http://opposedforces.com/parts/impre...llustration_9/