2003 Lexus GX 470 Owners Manual - Page 311

STARTING AND DRIVING THREE−WAY CATALYTIC CONVERTERS NOTICE A large amount of unburned gases flowing into the three−way catalytic converter may cause it to overheat and create a fire hazard. To prevent this and other damage, observe the following precautions: D Use only unleaded gasoline. D Do not drive with an extremely low fuel level; running out of fuel could cause the engine to misfire, creating an excessive load on the three−way catalytic converter. D Do not allow the engine to run at idle speed for more than 20 minutes. Three−way catalytic converters are emission control devices installed in the exhaust system. The purpose is to reduce pollutants in the exhaust gas. D Avoid racing the engine. D Do not push−start or pull−start your vehicle. D Do not turn off the ignition while the vehicle is moving. D Keep your engine in good running order. Malfunctions in the engine electrical system, electric ignition system or fuel system could cause an extremely high three−way catalytic converter temperature. D If the engine becomes difficult to start or stalls frequently, take your vehicle in for a check−up as soon as possible. Remember, your Lexus dealer knows your vehicle and its three−way catalytic converter system best. CAUTION D Keep people and combustible materials away from the exhaust pipe while the engine is running. The exhaust gas is very hot. D Do not drive, idle or park your vehicle over anything that might burn easily such as grass, leaves, paper or rags. 297