Hybrid Vehicle Frequently Asked Questions - Lincoln AVIATOR 2023 Owner's Manual

HYBRID VEHICLE FREQUENTLY ASKED QUESTIONS

What are the series of clicks from the cargo area when I switch the
Why does the engine sometimes start at key-on?
Why does it take a long time before the engine shuts down?
Unique Driving Characteristics
Question
ignition on?
The high voltage battery is electrically isolated from the rest of the
vehicle when the ignition is off. When you switch the ignition on, the
high voltage contacts inside the battery are closed. This makes the
electricity available to the motor and generator and allows your vehicle
to proceed. The clicks are the sound of these contacts as they close
and open during start up and shut down.
The vehicle's computer determines if an engine start is required at
key-on. Silent key starts the engine if it is necessary for cabin heating,
windshield defrost, or if the outside temperature is low.
There are several reasons the engine stays on for an extended amount
of time when you first start it. One common reason is to make sure
that the emission's components are warm enough to minimize tailpipe
emissions. As the climate gets cooler, this engine-on time is extended.
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