2009 Jeep Liberty Owner's Manual - Page 424

422 MAINTAINING YOUR VEHICLE CAUTION! Damage to the catalytic converter can result if your vehicle is not kept in proper operating condition. In the event of engine malfunction, particularly involving engine misfire or other apparent loss of performance, have your vehicle serviced promptly. Continued operation of your vehicle with a severe malfunction could cause the converter to overheat, resulting in possible damage to the converter and the vehicle. NOTE: Intentional tampering with emissions control systems can result in civil penalties being assessed against you. WARNING! A hot exhaust system can start a fire if you park over materials that can burn. Such materials might be grass or leaves coming into contact with your exhaust system. Do not park or operate your vehicle in areas where your exhaust system can contact anything that can burn. In unusual situations involving grossly malfunctioning engine operation, a scorching odor may suggest severe and abnormal catalyst overheating. If this occurs, safely bring the vehicle to a complete stop, turn off the engine, and allow it to cool. Service, including a tune up to manufacturer's specifications, should be obtained immediately.