What Causes Transmission Service Light To Come On In Your Volvo S80

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What Causes Transmission Service Light To Come On
In Your Volvo S80?
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There are a variety of reasons why transmission
service light can appear on the dash of your
Volvo S80.
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We will discuss those problems in detail, but
first let me help you to understand the meaning
of this light.
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What does transmission service light mean?
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It simply means your Volvo S80 needs transmission
service.
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The engine management system uses this light to
warn you about malfunctions in the engine.
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What causes transmission service light to come on?
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Low Transmission Fluid
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The transmission fluid essentially lubricates
moving gears.
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It also maintains optimal hydraulic pressure
within the system.
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Running low on this fluid can interfere in your
Volvo S80s transmission operation.
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As that happens the transmission service light
will come on to warn you.
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Overheating
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Listed below are a few reasons why the
transmission of your Volvo can overheat-

• Hot weather
• Driving in stop and go traffic
• Towing heavy load
• Low fluid

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When your Volvo S80s onboard computer finds out
about overheating, it would turn on the
transmission service light immediately.
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Faulty Torque Converter
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The torque converter essentially connects the
engine to the load.
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Technical flaws in such a vital part can
interfere in your Volvo S80s transmission
operation.
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When the onboard computer finds out about this
problem, it would turn on the transmission
service light.
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Flawed Sensors And Controller
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The transmission control unit or TCU regulates
every aspect of the transmission operation.
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To do so, it relies on an array of sensors.
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Technical flaws in the TCU or concerned sensors
can trigger transmission service light on the
dash of your Volvo S80.
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Sum Up
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The illumination of transmission service light in
your Volvo S80 signals serious transmission
trouble.
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You have to be quick to figure out the reason
behind it.
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