AT OIL TEMP light - Subaru Forester Owners Forum
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post #1 of 10 (permalink) Old 02-14-2009, 06:32 PM Thread Starter
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AT OIL TEMP light

On the way back home today, the AT OIL TEMP light suddenly comes on, of course disabling ABS, traction control, cruise and my will to live. I pull over to let the trans. 'cool off' since it is a balmy 30 degrees Fahrenheit outside and I've been driving 80 MPH on the interstate. Let the car idle for about 10 minutes, light is still on and flashing. I turn the car off and re-start it and the trans. light is now gone, but of course the CEL, traction control and cruise are all on. I drive it home that way and am at a loss as to why the light came on in the first place. Trans. fluid is at the proper level and nothing smells hot. Car is an '09 with just under 17,000 miles on it, and has had numerous little glitches like this that disable pretty much everything useful for some unknown reason. It is getting frustrating. Is there a way to clear the CEL manually?
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post #2 of 10 (permalink) Old 02-14-2009, 07:13 PM
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You can disconnect the battery and hit the brake pedal, then reconnect the battery after 30 minutes.

2005 Obsidian Black Pearl XT w/4eat
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post #3 of 10 (permalink) Old 02-14-2009, 08:18 PM
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^ I think I saw somewhere here that this method won't clear cels on '09s

Here's how we do it:

http://www.subaruforester.org/vbulle...ol-unit-15564/

MY'03 XS AT offroad; MY10 Triton GLX-R
www.subaruclub.com.au
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post #4 of 10 (permalink) Old 02-15-2009, 05:28 AM
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Is there a reason you are not taking it to the dealer?

Be careful what you wish for.
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post #5 of 10 (permalink) Old 02-15-2009, 09:14 AM
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ADC is right, being it is 30 degrees out(not freezing cold or blistering hot and the AT OIL TEMP light has come on, this may be a indicator of a larger problem. It is warranty work, let the dealer check it out and ease your mind.

Clearing the codes only removes what the dealer needs to aid in their diagnoses.

His - 08 X Prem 5mt
Hers - 08 X 4EAT
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post #6 of 10 (permalink) Old 02-15-2009, 04:54 PM Thread Starter
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I live about 150 miles from my dealer, or any subaru dealer for that matter. The CEL went off this morning without my resetting it, it must have cycled enough times (like 10-15 start cycles). Does this mean if I take it to the dealer they will not be able to diagnose the original problem? Do I have to wait for this random problem to recur or is it stored in the computer? I understand it would be warranty work, and I certainly would have taken it in if I were closer, but this could present a problem if I have to wait for it to show up again.
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post #7 of 10 (permalink) Old 02-16-2009, 03:57 AM
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Originally Posted by ObsidianBlack09 View Post
Do I have to wait for this random problem to recur or is it stored in the computer? .
I do know that some codes are "stored" but I don't think all. You might want to at least talk to the service manager before you bring it in. I understand your problem 150 miles yuuck.

Be careful what you wish for.
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post #8 of 10 (permalink) Old 02-16-2009, 07:57 PM Thread Starter
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It really seems like most of the diagnostic systems on my Forester have a pretty narrow window. I am constantly putting air in my tires over this bitter cold winter because the tire pressure monitoring system alerts when it is, what, under 29 psi? I guess I understand the concept, but 29 psi is hardly the danger zone. Same with the AT temp. gauge. Did it peak one degree over what the computer deems 'dangerous' and disable half my systems in the process? The more you fix the plumbing the more you stop up the drain I think. I guess I am used to driving pre-computer stuff, where it was no big deal to add coolant (or water!) each summer or add half a quart between oil changes.
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post #9 of 10 (permalink) Old 02-16-2009, 10:39 PM
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I'd guess that the AT Temp light can come on for reasons other than mere temp, also, it's VERY rare for a tranny to get that hot. I'd bet on either a faulty temp sender and nowt else, or some near-catastrophic failure.
Codes? Ought to be stored, CEL may clear after a number of restarts. We live in the days of OBD2, now.
Get the codes read somewhere, take it from there...
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post #10 of 10 (permalink) Old 02-16-2009, 10:55 PM
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I'd guess that the AT Temp light can come on for reasons other than mere temp, also, it's VERY rare for a tranny to get that hot. I'd bet on either a faulty temp sender and nowt else, or some near-catastrophic failure.
Codes? Ought to be stored, CEL may clear after a number of restarts. We live in the days of OBD2, now.
Get the codes read somewhere, take it from there...
^^^ correct that light will come on for a myriad of reasons, I doubt your transmission is over heating and may have something else going on....or nothing for that matter, I have had that light blink for nothing and then go away

don't stress
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