Lexus GX550 2025 - What to Do if

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What to do if... (Troubleshooting)
1-1.W hat to do if.. . (Trou blesh ootin g)
What to do if... (Troubleshooting)
 If you lose your mechanical keys,
new genuine mechanical keys can
be made by your Lexus dealer.
(P.542)
 If you lose your electronic keys, the
risk of vehicle theft increases signifi-
cantly. Contact your Lexus dealer
immediately. (P.542)
 Is the key battery weak or depleted?
(P.499)
 Is the engine switch in ON?
When locking the doors, turn the
engine switch off. (P.196)
 Is the electronic key left inside the
vehicle?
When locking the doors, make sure
that you have the electronic key on
your person.
 The function may not operate prop-
erly due to the condition of the radio
wave. (P.126)
 Is the child-protector lock set?
The rear door cannot be opened
from inside the vehicle when the
lock is set. Open the rear door from
outside and then unlock the child-
protector lock. (P.103)
 Did you press the engine switch
while firmly depressing the brake
pedal? (P.194)
 Is the shift lever in P? (P.194)
 Is the electronic key anywhere
detectable inside the vehicle?
(P.125)
 Is the electronic key battery weak or
depleted?
In this case, the engine can be
started in a temporary way.
(P.544)
 Is the battery discharged?
(P.545)
 Is the engine switch in ON? If you
cannot release the shift lever by
depressing the brake pedal with the
engine switch in ON. (P.200)
If you have a problem, check the
following before contacting your
Lexus dealer.
The doors cannot be locked,
unlocked, opened or closed
You lose your keys
The doors cannot be locked or
unlocked
The rear door cannot be opened
If you think something is wrong
The engine does not start
The shift lever cannot be shifted
from P even if you depress the
brake pedal