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Old 04-19-2012, 01:09 AM   #1 (permalink)
Czr
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Hello everyone,

I purchased a 1999 subaru forester about 4 weeks ago and it had some large leaks in the motor.

The motor was pulled out in order to replace some of the gaskets where the motor was leaking. The leaks were fixed however after getting the car back the Check Engine light was on and AT Oil Temp light starts flashing every time I shift the car from Park.

When shifting manually using 1-2-3 instead of D does not work, it drives as if it were in D.

I am wondering if this is a big deal or not. I have no problem leaving it the way it is if this is not going to cause major damage. Does anyone know what a possible cause may be?

Thanks,
Caesar
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Old 04-19-2012, 01:17 AM   #2 (permalink)
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Rut roh. Subaru torque converters are hard to remount. Dont know if they disturbed it. I am not sure exaclty what happens if it is not seated correctly and someone tries to drive it.
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Old 04-19-2012, 08:13 AM   #3 (permalink)
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Quote:
The leaks were fixed however after getting the car back the Check Engine light was on and AT Oil Temp light starts flashing every time I shift the car from Park.
Definitely not normal. Perhaps a connector wasn't replaced properly, or as nipper suggested, the torque converter was dislodged.

If the CEL was on when the car was picked up, did you point that out to the garage that did the work, either immediately or shortly thereafter.

If you've made the investment to repair the engine leaks I presume you want to keep the car for some time. In that case, I wouldn't disregard the warning lights and malfunctioning transmission.

Was the engine repair done at a Subaru dealer or Subaru specialist?

My suggestion is to get the car back as soon as possible. (Might even suggest having it flat-bedded if there's a significant distance involved.
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Old 04-19-2012, 09:23 AM   #4 (permalink)
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Quote:
it drives as if it were in D.
do you mean it starts in 1 and shifts up through the gears to 4 or is it ''struck'' in 4?? if stuck in 4 it is probably in ''limp'' mode. (in the 90s, really stuck in 3.)

the flashing AT Temp light means there is a electronic fault in the trans. read the trans codes, it will help.

is the trans oil pan dented?

check the largest wiring connector on the rear passenger side of the engine . check to see if ant pins are bent.

this is probably a wiring issue. check the dent in the trans pan.
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Old 04-20-2012, 01:21 PM   #5 (permalink)
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I second that, if the botched the installation of the converter and or coupling of converter to trans you would have some serious mechanical issues when driving. I suspect that there is a sensor that is not hooked up, hence the CEL and that this sensor is important to the ECU determing shift points hence the shifting issue. First scan ECU for codes with reader and resolve. If that does not clear flashing AT temp light, there is a method I believe to check for AT codes shorting some pins or you can get the correct adaptor, a laptop and download FreeSSM. I would start with CEL though first.
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Old 04-20-2012, 01:37 PM   #6 (permalink)
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I'm going to guess that when you go around a sharp turn in a dry parking lot (low speed, wheel turned completely left or right) you feel some binding, slowing down, hesitation, right? go try it.

the CHECK ENGINE light is on - go get the code. Advanced Auto, Autozone, and many other chains read the codes for free. tell us the exact code number like P0121 - not someone elses interpretation of what it means, we need the codes.

sounds to me like they installed the engine and the plugs aren't fully seated - and the trans needs some of those inputs -like TPS and isn't getting them so it's driving in LIMP mode. which will cause it to run in 3rd gear and "locked" 4WD - hence my initial response about parking lots and binding.

if the torque converter wasn't properly seated as folks have mentioned, the oil pump cracks and the trans doesn't really move much at all. maybe there's an "in between" failure but it would be a very odd thing - like they "partially" "incorrectly" seated it, then pulled the motor back out and started again - that's not likely, or let's hope not!
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Old 04-20-2012, 07:18 PM   #7 (permalink)
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So, I did take the car back to the mechanic and the code that was given was P0748. He said there were no loose connections or anything like that.
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Old 04-20-2012, 07:19 PM   #8 (permalink)
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I think it is driving in limp mode. It is not shifting gears.
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Old 04-20-2012, 07:34 PM   #9 (permalink)
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The Mechanic suggested replacing the solenoid with a new one, do you think it needs to replaced or can it be a bad connection?
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Old 04-21-2012, 08:06 AM   #10 (permalink)
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I believe P0748 is for a short or open circuit between the TCM and the line pressure solenoid.

If so, then the fault could be in the solenoid itself, but equally if not more probable is a broken wire or bad connection in the wiring to the solenoid.

The circuit should be checked for continuity or breaks before replacing the solenoid, and for a start perhaps just try removing and reconnecting the connectors on the harnesses going to the transmission.

Also, as was mentioned, inspect the transmission pan for any dents that might have happened if the pan was used to support the transmission with the engine out. This could be crimping on a wire inside, or could damage the valve body inside.
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