User Manual - Page 388

For 2019 Wrangler.

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386 STARTING AND OPERATING
NOTE:
When the fuel nozzle “clicks” or shuts off, the fuel tank is
full.
T
ighten the fuel filler cap about 1/4 turn until you hear one
click.
This is an indication that the cap is properly tight-
ened.
I
f the fuel filler cap is not tightened properly, the MIL will
come o
n. Be sure the cap is tightened every time the
vehicle is refueled.
Loose Fuel Filler Cap Message
After fuel has been added, the vehicle diagnostic system can
determine if the fuel filler cap is possibly loose, improperly
installed, or damaged. If the system detects a malfunction,
the “gASCAP” message will display in the odometer
display. Tighten the gas cap until a "clicking" sound is heard.
This is an indication that the gas cap is properly tightened.
Push the odometer reset button to turn the message off. If the
problem persists, the message will appear the next time the
vehicle is started. This might indicate a damaged cap. If the
problem is detected twice in a row, the system will turn on
the MIL. Resolving the problem will turn the MIL off.
CAUTION!
D
amage to the fuel system or emission control system
could r
esult from using an improper fuel filler cap. A
poorly fitting cap could let impurities into the fuel
system. Also, a poorly fitting aftermarket cap can cause
the “Malfunction Indicator Light (MIL)” to illuminate,
due to fuel vapors escaping from the system.
To avoid fuel spillage and overfilling, do not “top off”
the fu
el tank after filling.
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