2005 Dodge Stratus Owner Manual Coupe - Page 314

314 MAINTENANCE EMISSIONS TESTING In some localities, it may be or will become a legal requirement to ensure that all emissions components and systems are functioning properly as a part of the test procedure. The test center accomplishes this by checking the On Board Diagnostic System system (OBD) with an electronic scan tool. If your vehicle has recently been serviced, the OBD system may have been reset to a Љnot readyЉ condition because the OBD system has not had sufficient time since the servicing to reconfirm that emissions components are operating properly. In most cases, a reasonable mix and amount of normal city and highway driving and at least one overnight-off period will be required to prepare your vehicle for this check; however your authorized dealer has the equipment and procedures required to make certain that the OBD system of your vehicle is ready for the required testing. ONBOARD DIAGNOSTIC SYSTEM (OBD II) To meet new government regulations and promote cleaner air, your vehicle is equipped with a sophisticated onboard diagnostic system called OBD II. This system monitors the performance of the emissions, engine, and automatic transaxle control systems. When these systems are operating properly, your vehicle will provide excellent performance and fuel economy, as well as engine emissions well within current government regulations. If any of these systems require service, the OBD II system will turn on the Malfunction Indicator Light. It will also store diagnostic codes and other information to assist your service technician in making repairs. Although your vehicle will usually be driveable and not need towing, see your dealer for service as soon as possible. CAUTION! Prolonged driving with the light on could cause further damage to the emission control system. It could also affect fuel economy and driveability. The vehicle must be serviced before any state emissions tests can be performed.