What Causes AT Oil Temp Light To Come On In Your Subaru Forester

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What Causes AT Oil Temp Light To Come On In Your
Subaru Forester?
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Simply put, a lit-up AT OIL TEMP light is a
sign of transmission trouble.
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It signifies that your automatic transmission
fluid (ATF) temperature is too hot.
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What is ATF and what does it do?
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ATF is the lifeblood of your transmission. Its
job is to do the following things-

• Lubricate the moving parts
• Prevent premature wear and tear
• Inhibit oxidation and corrosion
• Prevent transmission overheating
• Maintain optimal fluid pressure
• Prevent sludge and rust build-up

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If something is off with the ATF, your
transmission will run rough and seize up.
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To prevent this from happening, your car comes
equipped with a set of sensors and computers.
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If they detect anomalies with the ATF, they will
set off the "AT OIL TEMP" light to warn you of
the problem.
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Listed below are a few reasons why your Subaru
AT OIL TEMP light may come on.
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Is your AT OIL TEMP light on?- Know the reason
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Low ATF
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The most obvious cause of AT OIL TEMP light
illumination is low ATF.
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Running low on ATF will make your car
transmission run rough.
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It would prompt the TCM to set off the AT OIL
TEMP light on the dash of your car.
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Contaminated ATF
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Another common cause of AT OIL TEMP light
illumination is dirty ATF.
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Therefore, check the ATF quality daily and if
necessary replace it.
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Rough Driving Habit
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Poor driving habits can cause your transmission
to act up.
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When the TCM finds out about the problem, it
would activate the AT OIL TEMP light to warn
you about the problem.
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Final Thoughts
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Illuminated AT OIL TEMP light is a sure sign of
ATF overheating.
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It is a cause of some concern and should never be
underestimated.
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