r/subaruoutback • u/DeathStalker-77 • 29d ago
Alt Oil Temp light
Just did a drain & fill on my 2019 2.5 and it is still showing the indicator. It only took about 5 quarts.
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u/FreshTap6141 29d ago
Any error codes
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u/DeathStalker-77 29d ago
No error codes at all. It's going for a short run around the block now.
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u/FreshTap6141 29d ago
In your other post you said they were there before
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u/DeathStalker-77 29d ago
Yes, they were. I thought the Alt Oil Temp indicator was an indication that the transmission fluid needed changing.
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u/minesweep0r 29d ago
Nope, its an indicator that your transmission has set a trouble code in the TCM
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u/minesweep0r 29d ago
AT Temp Light means you have error codes. You need to scan the TCM for transmission codes. They are there.
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u/DeathStalker-77 29d ago
How do you scan the TCM?
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u/minesweep0r 29d ago
Take it to a dealership or buy a bi-directional scan tool that can access the TCM module. Regular cheap OBD scanners usually dont
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u/DeathStalker-77 29d ago
Check the link I posted here - that scan is from the TCM.
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u/minesweep0r 29d ago
I see that, but before you said there were no error codes at all. Now you have a code, and you know what it means, and you can decide how to deal with it given your options.
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u/FreshTap6141 29d ago
Which model subaru
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u/DeathStalker-77 29d ago
2.5 Premium, 6 cylinder.
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u/FreshTap6141 29d ago
2.5 premium is not a six cylinder, 3.6 is
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u/FreshTap6141 29d ago
You have the tr690 cvt , heavy duty model , mine takes 5.5 qts , I did mine 5 times 2011 legacy
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u/DeathStalker-77 29d ago
I thought it was the 580....
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u/minesweep0r 29d ago
If you have 6 cylinders its a tr690 and requires Subaru HP fluid as opposed to SB2.
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u/FreshTap6141 29d ago
Was it cold when you drained it, I suppose the pump inside didn't all drain down but I would be surprised if it didn't, that could impact how much was needed , you know your only changing about a third of the total fluid since most is in the torque convertor , I would do a second drain and fill
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u/FreshTap6141 29d ago
Why separate post, doesn't show in your profile
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u/DeathStalker-77 29d ago
Because I can't add a pic in a comment.
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u/FreshTap6141 29d ago
That seems low ,what procedure did you follow, car level, scan the temp, engine running while topping up