2015 Jeep Patriot Owner Manual - Page 480

478 MAINTAINING YOUR VEHICLE gas cap is properly tightened. Press the trip odometer RESET button to turn off the message. If the problem persists, the message will appear the next time the vehicle is started. This might indicate a damaged cap. If the problem is detected twice in a row, the system will turn on the MIL. Resolving the problem will turn the MIL light off. EMISSIONS INSPECTION AND MAINTENANCE PROGRAMS Normally, the OBD II system will be ready. The OBD II system may not be ready if your vehicle was recently serviced, recently had a dead battery or a battery replacement. If the OBD II system should be determined not ready for the I/M test, your vehicle may fail the test. Your vehicle has a simple ignition actuated test, which you can use prior to going to the test station. To check if your vehicle's OBD II system is ready, you must do the following: In some localities, it may be a legal requirement to pass 1. Cycle the ignition switch to the ON position, but do not crank or start the engine. an inspection of your vehicle's emissions control system. Failure to pass could prevent vehicle registration. NOTE: If you crank or start the engine, you will have to For states that require an Inspection and Mainte- start this test over. nance (I/M), this check verifies the "Malfunction 2. As soon as you cycle the ignition switch to the ON Indicator Light (MIL)" is functioning and is not position, you will see the Malfunction Indicator Light on when the engine is running, and that the OBD II (MIL) symbol come on as part of a normal bulb check. system is ready for testing.