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Formerly had 900s have a black 2005 9-3 ARC auto at present
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Discussion Starter #1
I did a search for my issue and found similar threads, but from 2012, 2013 and 2017... and rather than resurrect an old thread that didn't answer the questions, I have decided to start a new thread.

My 2005 9-3 ARC auto has a solid yellow engine light. It drives fine and seems powerful and smooth enough... and is doing 8.1L per 100km... so, not limping. It pulls strongly and the turbo needle goes to the end of the white, nearly to the red if I stand on it... I am happy with the performance, it starts fine, idles nicely... happy days!

When I first got the car, the yellow engine light was on, I googled 9-3 issues and replaced the fuel cap... after about half an hour's driving, the light went out. The next day, however, the light came back on... solid yellow.

So, I plugged in a UBD11 scan tool and it came up with 6 codes:

PO201
cylinder 1 injector A circuit

PO202
cylinder 2 injector A circuit

PO203
cylinder 3 injector A circuit

PO204
cylinder 4 injector A circuit

PO245
Turbocharger/supercharger
Wastegate Actuator A Low

PO246
Turbocharger/supercharger
Wastegate Actuator A High

So, in my research on the other threads, code PO245 suggests a failing ecm.... however both of my scan tools bought up the same codes and it seems to me that the PO245 is to do with a wastegate issue, rather than an ecm failure? As I said, the car is running perfectly, it is not using alot of fuel, it doesn't smell of fuel, no black smoke to suggest it is running rich, starts with no throttle... plenty of go. Also, why would the yellow light have gone out after I replaced the gas cap and filled the tank.... only to come back on the next day... but again, absolutely no running issues?

I am running 98 octane fuel, I put some injector cleaner (nulon) in the fuel tank

Should I cancel the codes and see if they come back on? Should I leave it be, as it is running so beautifully? Or should I start saving for a replacement ecm?

Any advice gratefully accepted
273606
273607
 

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bad ecu
 

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Yep.
 

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sorry but there are plenty of threads on the injector codes all saying the same failed ecu..
 

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Formerly had 900s have a black 2005 9-3 ARC auto at present
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Discussion Starter #5
Yes, there are a few threads on this subject, but no real information in them other than bad ecu.










If code PO245 was an indication of a bad ecu, it would read: PO245 bad ecu... but mine reads:
PO245
Turbocharger/supercharger
Wastegate Actuator A Low

So, therefore, PO245 and PO246 mean there is a problem with the Turbocharger/supercharger Wastegate Actuator being low and high at the same time... I am hoping that someone who has experienced these codes and can actually offer some advice other than bad ecu... and if anyone in the threads here actually found out what the problem was, or did everyone simply buy a new ecm?
 

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2004 9-3 Aero, 2008 9-3 Aero, 2009 2.0T XWD
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Trust me/us, when these things start dumping fuel and throwing injector codes, the ECM is almost always bad. I just cloned one recently due to having these EXACT injector codes. My first experience with this was directly with a Saab specialist.
 

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Formerly had 900s have a black 2005 9-3 ARC auto at present
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Discussion Starter #7
Thanks, but before I go buying or fixing my ecm, I will investigate whether the actuator is functioning and whether the wires are in tact and the plug isn't corroded or anything like that. As there are no symptoms present... easy start, no rough idle, no smell of fuel, smooth acceleration, the boost gauge reacting normal, I am wondering if the ecm is just reading outside it's happy window of measurements... like a . of an ohm over or under what it needs to see, so it is throwing the light on solid yellow.

Since it is still performing ok, I will unplug all connectors and make sure they have no corrosion or damage then reconnect them with some dielectric grease so they get a good contact... and clean all earth/ground points.

Whatever is up with mine is very small... as I said, after filling with fuel and fitting a new fuel cap, the light went out for a day, then came back on again... in the mean time I will try and find someone here in Oz that can sort out the ecm if it ever becomes an actual issue.

If it does ever start running rough, hard to start or smell of fuel or lose power... I will put it in here, like a time line of any further symptoms or progression of failures.

I will also replace the spark plugs when I can work out which are best for it, as, as always, there are a few people with ideas all contradicting each other on what is the best plugs... and check the injectors resistance... that sort of thing

I must admit, I am thinking, until it shows any symptoms... letting 'sleeping dogs lie' sounds like a good idea (for now)
 

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Good luck. Your better choice is to replace driver chip for injectors and turbo bybass solenoid (all same chip) in ECU. Or replace ECU. See linked post; disregard thread title.
Help P0034/P0035 codes
 

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your ecu is toast,end of..No ifs or buts we now know in this 9-3ss forum p02** codes = failed ecu,there has been enough of them..
 

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More then likely the ecm is on it's last leg. Check the main relay, it gives power to all of the injectors and solenoids. The drivers for the injectors and solenoids in the ecm are really the only common denominator if all wiring and connectors are good. Obviously check all the connectors, there is also a large gang connector under the battery to check that feeds all of the main harness. We have cloned hundreds of these ecms and repaired many. There have only been a few with the all the injector codes that did not need replacement or repair. Normally there would be an accompanying P0601 and I don't see that as one of your codes. You mentioned a UBD11,what is that or did you mean OBD11? Either way sometimes the generic scan tools are not able to retrieve all the codes.
 

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there are plenty of owners over the yrs have had the P06 internal rom failure code without the p02 injector codes..
 

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Formerly had 900s have a black 2005 9-3 ARC auto at present
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Discussion Starter #12
Are there any places in Australia that fix ecm's? Does the ecm from another car plug and play or does a replacement ecm have to come with the keys from the donor car?
 

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Formerly had 900s have a black 2005 9-3 ARC auto at present
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Discussion Starter #13
In other words, can I buy another ecm and when that arrives, swap it out? Or do I have to send my one to have it sorted? If so, who is best to send it to to get it done?
 

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You'd still have to clone your failing ECU's software and data over to the new ECU using T8Suite, a laptop, and appropriate cable, or remove the old ECU and add the new one with a Tech2 (GM scantool). Either method will work, and pre-2008 used ECUs are available. Best is to get a used ECU with the same part # as the one in your car, but this is not necessary for cloning with T8Suite. You do not need new keys for ECU swap.

Perhaps someone else here can help with outfits who do ECU work in AU.
 

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Formerly had 900s have a black 2005 9-3 ARC auto at present
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Discussion Starter #15
Thanks, so, should I be looking for another ecm? or will whoever fixes mine need to only use mine?
 

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If whoever works on it can actually fix your ECU, they won't need another. This method has been reported to have mixed success here, but I think that depends on both the outfit doing the repair and the nature of the failure. If they have to clone your ECU, you'll need to supply a new($$$) or used one, unless whoever you send it to can also supply you with one, usually used/tested. Then it's just a simple replacement on your end.

In the case of a local shop with a Tech2 scantool and Saab software for it, they'll need both original and replacement ECUs. This may be your least expensive option, if there's a shop near you that can do the add/remove.
 

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Formerly had 900s have a black 2005 9-3 ARC auto at present
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Discussion Starter #17

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Formerly had 900s have a black 2005 9-3 ARC auto at present
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Discussion Starter #18
What about the guy in Kentucky, Saabtunerscott? his ad says he can send a replacement with no core?

Oh, and is it the ECM that is failing and needs replacing, or the ECU? (or both)?

 

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ECU/ECM are the same thing. I've given up being pedantic about ECM here. :)

Ebay ECUs are worth the risk only if you can return them for refund if they turn out to be defective.

I don't know about the Kentucky guy, as the only ECU I've repaired, I did myself. Wanttohelp above might be able to help you out with repair. Good US cloners I have experience with are Brew City Boost and SAGE cloning. Both of those will also sell you a used & tested ECU.

You might also check the "local" Saab clubs. They have parts available, and can probably help you out finding parts & service in-country:
Saab Car Club of Australia

There are also several Saab service outfits in Brisbane:
SAAB Automotive Services
Comet Automotive
Brisbane Saab
 

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You will need TECH2, because "new" ECU needs reprogram IMMO code.
 
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