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Discussion Starter · #1 ·
A couple of times over the past month, i've noticed my 2003 9-3 2.2D Saab was a little slow during the first few seconds after a cold start, however after no more that 30 seconds, the turbo seems to kick in and all is fine for the rest of the journey. I had put it down to just the engine being colder than normal during the recent drop in temperatures.

However 2 days ago when the car was lacking acceleration shortly after a cold start, I put my foot down, the CEL came on and the engine went into limp-home mode.

Later on I checked the code and it has come up as P0244 - TurboSuper Charger Wastegate Solenoid "A" Range/Performance. I cleared the code and it has not returned, however I notice that over the last couple of days the car is sluggish for the first 2-5 minutes till the engine warms up, if I don't put my foot down hard during this time, then it is fine and after 5 minutes I have normal performance.

Looking through the forum around what the wastegate is and what is does, I get the impression that it is my "Boost Control Solenoid" or BCS which is at fault and is possibly sticking when the engine is cold?

Is this part serviceable? Can a little squirt ot WD40 in the right place sort me out and if so, does anyone have a diagram of where this solenoid can be found?

Any help or advice would be most welcome.
 

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the solenoid sits in a little rectangular box on top of the wastegate actuator. there are three rubber tubes attached. the solenoid acts like a valve routing pressure through those tubes.

Solenoid is actually a misnomer here, since the solenoid part is an electromagnet in that small box. the steel shaft is connected to the actual valve, but everyone calls these "solenoid valves."

The solenoid is used because it can be turned on/off very quickly, like 100 times per second. In this way it can act like it's partially open. The amount of on vs. off time controls how far the wastgate can open in this application.

The electromagnet part of solenoids are prone to sticking. That's often how they fail. They are sealed in a plastic enclosure, and generally not serviceable. You can verify that the electrical connection has not been mangled in some way. Otherwise it probably needs to be replaced.
 

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I haven't looked under the hood of our 9-3 yet but the "plumbing" should be similar to my Subaru. There should be a vaccum hose connected to the turbo compressor outlet that leads back to the BCS. Another hose from the BCS will head back toward the turbo and be connected to cannister of sorts that has rod sticking out one end (wastegate actuator).

I have read people using brake cleaner to wash out the BCS.
 

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make sure that the tube coming out of the actuator is connected as it is only a push fit, if you look to the back of the turbo you will see the actuator with the rubber pipe leading towards the bulk head, this should in turn push into a smaller plastic pipe that runs to the right and behind the abs module. if these 2 are not connected then you will get no boost whatsoever below 3k revs than when u hit 3k the turbo will be on full boost all of a sudden and could reach enough pressure to blow it. just a thought as my 2 pipes had come apart and had the same feeling as yours, mine is the 125bhp 2.2tid
 

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Discussion Starter · #5 ·
Since the car eventually behaves itself once it has warmed up, I can't see this being a disconnected hose, as I would think this would cause permanent performance problems?

ctrlz said:
The electromagnet part of solenoids are prone to sticking. That's often how they fail. They are sealed in a plastic enclosure, and generally not serviceable. You can verify that the electrical connection has not been mangled in some way. Otherwise it probably needs to be replaced.
Do you think that my problems will gradually get worse and the unit will eventually fail? I was hoping this was just a minor inconvenience which could be addressed in the new year.
 

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cuggybear said:
Do you think that my problems will gradually get worse and the unit will eventually fail? I was hoping this was just a minor inconvenience which could be addressed in the new year.
In my experience sticking solenoids continue to stick. Usually they are nothing more than steel bars that move back-and-forth in an electric coil. The ends of the bar are held in simple sleeve bearings with some light grease. The one for boost control is pretty small and seems to be encased in plastic. I have been able to service larger ones on home appliances where you can see the whole assembly, but this one is nothing like those.

My comments about the hose arrangement pertain to the 2.0 petrol cars. Yours may be a bit different.

here's what mine looks like:
http://www.saabcentral.com/forums/attachment.php?attachmentid=686

1) line from turbo compressor to solenoid
2) solenoid to wastegate actuator
3) vent to intake

You can see the rectangular box where the three tubes connect. that's the solenoid valve. The square bit on top of the rectangle is the electrical connection. you can see the wires coming in from the left.
 

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Discussion Starter · #7 ·
Thanks for the picture, always handy to knwo what you are looking for!!

Obviously mine is the 2.2tiD so it will be in a different place, but should not look too different I would imagine.

Providing I can find it, would you say it is fairly easy to swap out with a replacement, or would it require specialist tools / recalibration etc?
 

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According to the WIS you should have a Garrett variable nozzle turbine which does not have a wastegate!

Surprise, surprise!
I can't explain your wastegate solenoid code.

Anyone with diesel experience?
 

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Ok, considering this thread popped right back up from 07' - I will chime in as well..

My car does the same exact thing. It's slow until it fully warms up.

However, with the tune (vtune) the slowness turns into bucking and chocking (basically more pronounced) even from the slightest taps of the gas pedal.

Of course, I remove my foot from the pedal fearing something might happen, but it NEVER throws a CEL. On my HP tuners diagnostic tool, I got a KR of 7 (tuned) and a 3-4 (not tuned)

Anyone have an idea if this related to the above mentioned posts? Because I seriously don't understand any of the discussions that went on.

My dealer seems to be the one: "if there is no CEL, we ain't looking at it"
 

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I'm not convinced.
I can't back up my claim convincingly but I also have a 2.2Tid which has had it's share of CEL joviality.

EVERY time the CEL is on, the same P0244 code is stored.

The last time was a split charge air hose (obvious fault), time before that was a split intercooler.

The P0244 code was stored, along with at least one other (sometimes a couple more).

My best guess, is that when the car goes into Limp Home Mode, the car shuts off the Turbocharger, maybe the car deliberately closes the solonoid (or whatever it is), this is HOW it goes into Limp Home Mode and P0244 is a result of the CEL activating, and NOT the actual fault which caused it in the first place.

Happy to be discredited. :):)


EDIT:just noticed the dates on the posts, typed it now so it can stay!
 

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it could be the exhaust gas recirculation (EGR Valve).
get dirt in short distances drive and spirit drive.
it can be cleaned or replaced.
That's is common fault of diesel engines.
 

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It seems my #1 hose is not connected anywhere.
Is this right ??

if not: where should I connect it to? (saab 9-3 2003 vector cabrio)
A picture would be welcome!!

Thanks!

In my experience sticking solenoids continue to stick. Usually they are nothing more than steel bars that move back-and-forth in an electric coil. The ends of the bar are held in simple sleeve bearings with some light grease. The one for boost control is pretty small and seems to be encased in plastic. I have been able to service larger ones on home appliances where you can see the whole assembly, but this one is nothing like those.

My comments about the hose arrangement pertain to the 2.0 petrol cars. Yours may be a bit different.

here's what mine looks like:
http://www.saabcentral.com/forums/attachment.php?attachmentid=686

1) line from turbo compressor to solenoid
2) solenoid to wastegate actuator
3) vent to intake

You can see the rectangular box where the three tubes connect. that's the solenoid valve. The square bit on top of the rectangle is the electrical connection. you can see the wires coming in from the left.
 
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