After refueling, turn the fuel tank cap until you hear a click. Once the cap is released, it will turn slightly in the opposite direction.

Caution
When replacing the fuel tank cap
Do not use anything but a genuine toyota fuel tank cap designed for your vehicle. Doing so may cause a fire or other incident which may result in death or serious injury.
Opening the fuel tank capProblem symptoms table (2005/11-2006/01)
Hint:
Use the table below to help determine the cause of the
problem symptom. The potential causes of the symptoms are
listed in order of probability in the "suspected area" column of
the table. Check each symptom by checking the suspected
areas in the order they are listed. Replace p ...
Sensor (motor) failure
Description
When the sliding roof drive gear (sliding roof ecu) detects the motor's
malfunction, and the sliding roof
operation is stopped, dtc b2341 is output. When the sliding roof drive gear
(sliding roof ecu) detects the
gear's malfunction, and the sliding roof operation is stopped, d ...
Hill-start assist control
When the engine is stopped by
the Stop & Start system when
the vehicle is on an incline,
when the brake pedal is
released, brake force is temporarily
maintained to prevent the
vehicle from rolling backwards
before the engine is restarted
and drive force is generated.
When drive force is generat ...