See also:

What is not covered
This warranty does not cover damage or failures resulting directly or indirectly from any of the following: • Fire, accidents or theft • Abuse or negligence • Misuse — for example, racing ...

Have the vehicle inspected by your Lexus dealer immediately.
Failing to investigate the cause of the following warnings may lead to the system operating abnormally and possibly cause an accident. Have the vehicle inspected by your Lexus dealer immediately. ...

Ignition system
NOTICE  - Iridium-tipped spark plugs Use only iridium-tipped spark plugs. Do not adjust the spark plug gap. ...