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Old 05-25-2011, 11:56 PM   #1
kero
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Default OIL AT TEMP light flashing while driving the car

Guys,

First time this happened, 2007 2.5i wagon with complete catless UEL system, 43K, 4eat.

First off I'll start by all regular maintenance done as should be.

Temp this evening was about 70 degrees, on my way to a local suby meet I go to every wed.

On the way home from work, the cruise starting blinking WITHOUT the cel light coming on, never saw this before without cel light on at the same time.

Car sat for about 4-5 hours before heading out to the meet, 5 minutes into driving, the OIL AT TEMP light starting flashing and continued to do so until I reached the meet, about 15 minutes later.

Oil level is fine, checked tranny fluid level the other day, was fine, color normal, no odd smell.

At the meet for 2+ hours, drove home for about 20 minutes, neither light came back on, care drove fine, no noticeable issues of any kind.

Any hints to why the oil at temp light came on and continued flashing? No problems I can see with the 4eat of any kind.

Did a quick google search and came up with:

"If the light comes on while the engine is running, it may indicate that the fluid temperature in the automatic transmission is too hot; avoid steep grades or stop-and-go traffic
If the light flashes after the engine starts, it may indicate that the control system is not working properly; service immediately"

Now my light was flashing while driving the car, it was not on solid.

Need some help here, never happened before, was driving normal like any other day this evening.
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Old 05-26-2011, 08:33 PM   #2
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bumpity
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Old 05-27-2011, 08:37 AM   #3
Brock31
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Has the fluid been changed recently?

Maybe a possible problem with the trans cooler? Maybe check all the hoses going to the cooler?
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Old 05-27-2011, 10:06 AM   #4
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^^ Fluid was changed with 30K service. Fluid looks very good and does not smell burn't whatsoever, level is right on the money as well.

I guess this is not a common issue or ppl have run into it, just my assumption though.

I'll make an appt at my local suby dealer to have it checked out as it should be covered under the 5 year, 60k powertrain warranty.
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Old 05-27-2011, 11:24 AM   #5
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If the temperature of the ATF was too high, the temp light would stay on solid, until the temperature became cool enough at which point the light would turn off.

If it is continuously flashing than there is another problem.

With 4EATs, the AT TEMP light will come on after one ignition cycle to when the original problem had started. So you might feel a problem with the transmission and the AT TEMP light will not come on until the ECU/TCU sees one ignition cycle after the problem occurs, then the light will flash.

Only 2 trouble codes are generated as soon as the problem occurs which will set off your check engine light, which in your case has not happened. The other trouble codes will only trip a CEL if the ECU and TCU see the same problem happen if it has 2 consecutive faulty trips/drives. If you have one faulty trip, and then a successful/clean trip, the previous problem will be reset and the monitors reset.

I wouldn't worry about it. It might be hard to recreate the same problem if you don't have 2 consecutive faulty trips, at which point would trip a CEL and give you the code. You could always bring it to the Subaru dealer and have them check out stored codes in the TCU and then go from there.
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Old 05-27-2011, 02:11 PM   #6
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^^ At lunch today, driving about 15 minutes light came on, had lunch, maybe 40 minutes, drove back to work, light did not come back on. I am almost willing to bet on the way home it comes back on again.

I don't think the problem is something I can recreate at will, however, this weekend I will stop by advanced auto and see if any codes are stored, you just never know.

Will post back up this weekend.

I have yet to feel any maladies with the 4eat, drives as it should, no bucking, slipping, sluggishness of any kind that I can tell.

I am not worried per say that I will get stuck or something, but just hope there is not an issue that is causing harm to the tranny of any kind.

Here's the kicker, I called up my local suby dealership, whom in the past I have had good success with, they tell me $115 to diagnose, I tell him, car only has 42K give or take and is only 4 years old, I also said the powertrain warranty is still in effect, he admits that he knows it's a tranny related issue or problem, I say good no problem, he says yep, $115 to diagnose first. I was like WTF........

So, I will have to call 1 or 2 others and see what they say, not gonna pay $115 to find out the work that needs to be done, if any, is covered under warranty.

Boy have things changed.

ps - I know what an ecu is, but never heard of a tcu, is that a transmission control unit??? Just guessing?

pss - I found this cool pdf of the 4eat, it's a good read but not sure it helps me in anyway
http://www.northursalia.com/techdocs...ssion/4eat.pdf

Last edited by kero; 05-27-2011 at 02:17 PM.
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Old 05-27-2011, 07:07 PM   #7
bill harvey
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This happened on my grandfathers outback out of the blue and he needed new clutch packs
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Old 05-27-2011, 08:51 PM   #8
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^^ I'll be honest in saying, what the hell are clutch packs, and are those parts, whatever they are, for the auto tranny's or am I getting confused cause the work "CLUTCH" with regards to 4eat?

What do they do exactly and how do they affect the tranny when failing?
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Old 05-28-2011, 12:16 AM   #9
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The TCU is the transmission control unit.

Over filled transmission can cause over heating and a flashing cel. When was your last transmission drain and fill?

Also, check your radiator and make sure it is filled. The radiator has an internal transmission cooler.
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Old 05-28-2011, 12:48 AM   #10
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Went to the auto store, only code that came up was P0719 which is for the brake switch which I am having problems with.

The tranny fluid was done at 30K, now have around 42K. Color is good, odor is good, level is good.

Coolant is full, overflow tank is at the correct level, I did not have the coolant flushed and filled yet. Should I buy one of those little coolant testers to see how the cooland is fairing despite the car running in perfect temp ranges?

The car's running temps are dead on since the day I got it.

EDIT: HOLY CRAP MOMENT

Guys, I was searching about the P0719 and found this

http://www.myautorepairadvice.com/p0...rcuit-low.html

Maybe my bad brake switch is causing the "OIL AT TEMP" problem, based on what was in that link, it's possible the bad brake switch is causing the tranny to run a little different, hence throwing the light to flash constantly, like it senses something wrong? I did notice tonight when I slow down, the car seems to be engine braking a bit, the rpms used to drop quickly I believe but now the rpms drop really slow.

Some please humor me and tell me they think this could be it LOL!

What ya think????

Last edited by kero; 05-28-2011 at 01:22 AM.
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Old 05-28-2011, 02:23 AM   #11
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Good news and bad for P0719, good it's not the actual transmission.

Could be a short between the TCU and stop light switch (harness) or check fuse 16, if bad, then short is between fuse 16 and the stop light switch or bad switch. Also check the TCU harness to see if it is not loose or has poor connection.

Worst case is you need a new TCU.
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Old 05-28-2011, 10:37 AM   #12
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Joe, I def can check fuse 16 today and get back to you, where is the TCU harness, hopefully somewhere simple?

Well if I did need a new TCU, that would be 100% warranty I think, since it's directly related to the transmission, hopefully?

Also, do you think I could be on to something with regards to the brake switch issue and cel and the OIL AT TEMP Light?? They have to be related somehow since they started at the exact same time.

The bad part, I wish I was able to pull TCU codes easily but I hear it's a pain in the ass and the dealer should do this as part of the warranty work as it's related to the tranny, which is still under warranty.
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Old 05-28-2011, 10:44 AM   #13
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If it still under warranty, I wouldn't mess with it. The dealer should take care of it. FYI, The ECU and TCU is in the passenger foot well area.

Is your brake light working?
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Old 05-28-2011, 11:04 AM   #14
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I don't now why you're wasting your time here. You're under powertrain warranty. Take it to the dealer to get fixed before you screw things up trying to figure out what's wrong. There is a reason they get paid to do what they do and you don't. The more possible damage you do to it whatever is wrong could make things worse. Then when you tell them you've been driving around with it flashing for as long as you are then they may say screw you and you'd have to pay for part of the repair. You're not a mechanic and neither is 80 percent of nasioc.
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Old 05-28-2011, 11:10 AM   #15
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Joe, all 3 brake lights work only on occasion, on a 40 minute drive home, with the wife driving behind me, they only worked twice at most.

Checked fuse 16, not blown, I looked at two thing about TCU, there was a block box to the left of the steering column bolted up to a bracket, those connections were solid, I checked passenger foot well, nothing under the dash, behind a plastic cover in the pass footwell, I saw 4-5 large connectors, no box of any kind, but checked those as well for good measure, all nice nice and tight
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Old 05-28-2011, 11:12 AM   #16
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Guys, I understand, the brake light switch will not be covered and it's a simple fix from what I see. Based on not having any working brake lights, can't get out park sometimes and P0719, the brake switch is most def on it's way out.

The OIL AT TEMP thing, I'll have to find another dealer as I'm not gonna pay someone $115 to tell me something is covered under warranty, we all know that's BS.

The funny thing is that with 42K, I'm surprised to be having these issues with a superbly well taken care of car, they just don't make them the way they used to but I love my suby nonetheless.

Last edited by kero; 05-28-2011 at 11:27 AM.
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Old 05-28-2011, 11:28 AM   #17
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Quote:
Originally Posted by kero View Post
Guys, I understand, the brake light switch will not be covered and it's a simple fix from what I see. Based on not having any working brake lights, can't get out park sometimes and P0719, the brake switch is most def on it's way out.

The OIL AT TEMP thing, I'll have to find another dealer as I'm not gonna pay someone $115 to tell me something is covered under warranty, we all know that's BS.
I'm confused as to why you're paying $115 just to take your car into the dealer. If there is an issue with your car that is covered under powertrain then they fix it at no expense to you especially if your car is well taken care of like you claim. I kind of feel like you're failing to mention something about this problem.
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Old 05-28-2011, 12:00 PM   #18
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No, I simply called up my local dealership whom I dealt with in the past, no problems ever, I tell him my OIL AT TEMP light is blinking while I drive and does not go off, I tell him I have 42K and the car is a 07 2.5i wagon. He says okay $115 to diagnose it.

I said wait, the car is under the 5 year 60K powertrain warranty and that lights indicates a tranny issue, he says yes it does. I said okay, so I'll bring it down, he says okay I'll still need $115 to diagnose it.

The brake switch is something else, but I mentioned it soley because they started at the same time.

I am going to get a brake switch today if they are open, if not tuesday, and put that in, this has to be done so I can have all 3 brake lights working.

Honestly, I think he was being a major DBAG if you ask me. It seems like he wanted to milk me for $115 eventhough he knows it's a warranty coverage issue.
LI, NY dealerships for the most part are total ********, they treat ya like garbage and try to steal money from you every chance they get. In total, I think this guy was hoping I would say SURE, i'll pay ya $115 cause you want me to. Some ppl fall for that. I don't.

Tuesday I'll call two other places and see what they say, it's possible this original guy thought I was a sucker as he didn't look up my details on the computer to see I have been there before.

Regardless, the car will get down this coming week to get looked at and I'll go from their with regards to the "oil at temp" light blinking.

We all know, that what they find will be tranny related in some way shape or form, so the warranty is on my side, and they'll just have to fix it.

Last edited by kero; 05-28-2011 at 12:11 PM.
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Old 05-28-2011, 01:00 PM   #19
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I think the problem here is you aren't comprehending what he was saying. So you called up said you had a trans issue because of the light. Then I'm sure you also mentioned your brake light problem. Most likely he was informing you that you will be charged 1 hour diag at $115 bucks and hour for it. Or he may have said you have to pay $115 to diag the car and if it turns to a covered warranty item then it's a different story. This type of confusion happens a lot because customers think they will have to pay out of pocket for a warranty item. Happens even more when there are people from nasioc involved and try to blow things up more then they are or just hate dealers to begin with.
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Old 05-28-2011, 06:25 PM   #20
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^^ Picked up the switch at the same place, where my buddy works in the service department working on the cars (he's not the person I spoke to BTW), I got the brake switch for $30, normally 50+.

Gonna put that in tomorrow and report back on the brake lights.

The guys in the parts dept, whom my buddy knows, said to just bring down the car and tell them issue, they said they have seen this issue every so often but different things can cause it. They said don't worry about the $115 as the oil at temp light is def a trans related issue.

I will make the appt for this upcoming week and go from there.

Maybe the guy I spoke to, was having a bad day or didn't realize 100% what I was talking about so either way, it's gonna go in and get looked out. Maybe we confused eachother, who knows.

Will also update on that issue once I find out what's going on.

Now, most interesting, I found some more ppl through google search with my exact year car that have the same problem, and a few of those dealerships were unable to find the root cause.

Let's see what happens, will not drive the car until it goes in.
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Old 05-30-2011, 03:44 PM   #21
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Subscribing.
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Old 05-30-2011, 10:51 PM   #22
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Brake switch installed yesterday morning, cleared all codes, let car relearn idle and off I went to see what happened

Yesterday did 80+ miles in mixed driving, no "OIL AT TEMP" light and all brake lights working as they should.

Did 20+ miles today of mixed driving, no "OIL AT TEMP" light and brake lights are still working fine.

Now, before I replaced the brake switch, the "OIL AT TEMP" light came on multiple times a day at random, also had P0719 brake switch code stored in the ECU as well as brake lights just about non operational.

So, it seems things are on the upswing, thank god.

Now I don't want to jinx myself but it surely seems that my faulty brake switch was somehow related to the "OIL AT TEMP' light blinking.

I am no expert but it seems they were related in some way.
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Old 05-30-2011, 11:49 PM   #23
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Good job in fixing this and letting us know the fix!
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Old 05-31-2011, 09:25 AM   #24
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^^ No problem, amazing just how connected things are these days on cars, even a simple brake switch, going bad can cause the TCU to get testy.
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Old 05-31-2011, 09:54 AM   #25
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Glad you figured this out Kero, it's good to see someone who actually does the research and looks into their problems thoroughly to figure it out mostly by themselves with a little guidance.

Quote:
Originally Posted by kero View Post
Amazing just how connected things are these days on cars, even a simple brake switch, going bad can cause the TCU to get testy.
This.

I really really dislike the inefficiencies and the enormous amount of crap that today's vehicular computers will go crazy over. I like my OBDI Legacy where the CEL is only tripped if there is complete failure within a sensor or circuit. I double like my 1984 BRAT where there is almost no electronics.

Electronics = PITA
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