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Discussion Starter #1
I have a 2011 Subaru outback. Over the last year I have replaced the engine and the torque converter. Now the ECU is acting up and I need to replace it. If I can find a good place to buy a used one cheaply I kind of need to do that..
Any ideas on where I can find one cheaply and quickly? I'm from Baltimore
Ty in advance
 

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03 H6 OBW & 06 WRX Sportwagon
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do you feel certain the ECU is failing? not a common failure.

check car-part.com ,put a WTB in the classifieds here and at ultimatesubaru.org
 

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Master Caster
2005 XT, Mildly Modified...2006 XT Limited, Highly Modifed
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ECU can be repaired also.

But what directly tells you, it is the ECU?
 

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I had it in the shop a little while back with sudden stalling issues. The car started sounding really rough. The mechanic told me the ECU was going bad in it...I located where my ecu was and saw that it's not that complicated and can change it out. Thank you for the site. I really do appreciate it.
 

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2005 OBXT Limited, VF37, STI intake, 5MT
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I'm not 100% certain, but for 2011, you will probably need to reflash the ECU to match the car (VIN, mileage, immoblizer, etc). However, I'd talk to your local dealer about if they are willing to play with a used ECU. Some dealers won't touch it unless it came from SOA.
 

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Tracy - no guarantees of course but, in a new thread, if you asked for a shop recommendation near your city, someone might direct you to a subaru friendly mechanic of good reputation. You need a second opinion I think.
 

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2002 Pair: 3.0 VDC Wag & 2.5 Limited Sedan
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moved thread.
@Tracygg

very uncommon for a ECU to actually go bad, without it being a flood car. or some kind of abused turbo race car.

maybe have a dealer confirm diagnosis, and then have a regular mechanic replace it with a used one. (used should be fine, unless from a flood car).

edit: rare that these 2010-12 have engine problems necessitating a engine swap. = ultra rare on this board loaded with them (like you got one problem car there,...or a problem mechanic....or both).

and most importantly, you had the torque converter replaced.

there is a extended warranty on the whole transmission, 100,000 miles,
....or if more then 100,000 miles you only have till july 31 to find out if the trans is acting up again for a free fix:

and stalling can be a trans problem.

https://www.subaruoutback.org/forums/66-problems-maintenance/429481-cvt-warranty-extension-2010-15-a.html
 

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2012 Outback 2.5 Limited
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With modern cars it's more important than ever to do proper diagnostics before "throwing parts at it" due to the sophisticated designs and exceeding number of parts that could cause trouble. An ECU rarely goes bad, and to have a digital component like an ECU that controls everything about the car "selectively fail" by only having the engine running rough but everything else works seems even more fishy. I'm not saying it's impossible but it would be pretty darned low on my list of suspects.

An OBD2 scan tool (ideally one that can also read the Subaru specific protocol) is invaluable in this instance. Step one is verifying the tool can actually communicate with the ECU. Once that's confirmed you can start looking at the basics of engine monitoring and also scan for codes. The factory service manual has specific troubleshooting procedures to rule out which components are bad.

The mechanic should be able to articulate how they reached the conclusion as to which part is at fault by explaining the troubleshooting steps they went through and also show you the scan tool results.
 

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Now the ECU is acting up and I need to replace it.
It's probably not the ECU.

The shop misdiagnosing this is far more likely. I would not replace it just because one mechanic/shop tells you it's bad. Make certain the person diagnosing is a Subaru specialist and get a 2nd or 3rd opinion.

If I can find a good place to buy a used one cheaply I kind of need to do that.
You can't do that on this car. It needs properly married to the vehicle, a dealer will likely have to do that. Make sure your local dealer will do that to a used ECU.

Car-Part.com--Used Auto Parts Market
ebay
 

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Read any OBDII codes that may have been thrown. Do they point to an ECU issue? If not, your issue may be something as simple as the Mass Air Flow Sensor needing to be cleaned or replaced or an air leak in the intake duct or a failing spark plug coil. I would never swap out an ECU without direct evidence pointing to it.
 

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Master Caster
2005 XT, Mildly Modified...2006 XT Limited, Highly Modifed
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Did your ECU get wet?

I you source a new/used ECU, it will need to be linked to the immobilizer and key. It also will read the salvaged car's ECU when you hook up for emissions which will be an automatic fail.

The best thing to do is have it repaired, or source a legitimate dealer replacement if you are subject to emissions testing.

I know, this happened to me.
 

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On the Super Mod Squad
2002 Pair: 3.0 VDC Wag & 2.5 Limited Sedan
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with all the work you have had,

maybe some wiring harness or engine ground is open to the elements,
like wiggling apart / getting worse. ... possibly exacerbated by dampness.

________

and as this is a 2011,.... how is the battery? how are the battery cables.:
a old battery can make for many a check engine code. (weird ones,....things that could make a mechanic think ECU).

(lots of people make their fist post here with 5-7 year old cars, with "many" check engine codes and it is the original battery that is giving up. - making phantom codes as none of the cars systems have 100% of the power they need, ...and they are all complaining.
 

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I have a 2011 Subaru outback. Over the last year I have replaced the engine and the torque converter. Now the ECU is acting up and I need to replace it. If I can find a good place to buy a used one cheaply I kind of need to do that..
Any ideas on where I can find one cheaply and quickly? I'm from Baltimore
Ty in advance
Are you having your work done at a dealer or an independent shop?

If you are desperate for a cheap ECU you can start by checking the Crazy Rays locations.......of course after all the rain this week they are most likely mud holes.....:grin2:
 
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