2003 Nissan 350Z Owner's Manual - Page 120

d. You have had an accident involving damage to the exhaust system, underbody, or rear of the vehicle. CAUTION ¼ Do not use leaded gasoline. Deposits from leaded gasoline seriously reduce the three way catalyst's ability to help reduce exhaust pollutants. ¼ Keep your engine tuned up. Malfunctions in the ignition, fuel injection, or electrical systems can cause overrich fuel flow into the three way catalyst, causing it to overheat. Do not keep driving if the engine misfires, or if noticeable loss of performance or other unusual operating conditions are detected. Have the vehicle inspected promptly by a NISSAN dealer. ¼ Avoid driving with an extremely low fuel level. Running out of fuel could cause the engine to misfire, damaging the three way catalyst. ¼ Do not race the engine while warming it up. ¼ Do not push or tow your vehicle to start the engine. LOW TIRE PRESSURE WARNING SYSTEM (if so equipped) The low tire pressure warning system displays pressure of all tires (except the spare tire) on the trip computer by sending a signal from a sensor that is installed in each wheel. The low tire pressure warning system will activate only when the vehicle is driven at speeds above 20 MPH (32 km/h). Also, this system may not detect a sudden drop in tire pressure (for example, a flat tire by catching something while driving). Frequently check the tire pressure indicator on the trip computer and adjust pressure of each tire properly. See "Trip computer" in the "2. Instruments and controls" section for the tire pressure indicator. THREE WAY CATALYST The three way catalyst is an emission control device installed in the exhaust system. Exhaust gases in the converter are burned at high temperatures to help reduce pollutants. WARNING ¼ The exhaust gas and the exhaust system are very hot. Keep people, animals or flammable materials away from the exhaust system components. ¼ Do not stop or park the vehicle over flammable materials such as dry grass, waste paper or rags. They may ignite and cause a fire. Flat tire warning If the vehicle is being driven with a flat tire or extremely low tire pressure (lower than 28 psi), the low tire pressure warning light comes on, and the chime sounds for about 10 seconds. On the trip computer, the PSI indicator starts flashing and the current display switches to the tire pressure indicator. For additional information regarding the above warning, see "Trip computer" and Starting and driving 5-3