3934-2. Maintenance4Maintenance and careEmission inspection and maintenance (I/M) programsSome states have vehicle emission inspection programs which include OBD (On Board Diagnostics) checks. The OBD system monitors the oper-ation of the emission control system.■ If the malfunction indicator lamp comes onThe OBD system determines that a problem exists somewhere in the emission control system. Your vehicle may not pass the I/M test and may need to be repaired. Contact your Lexus dealer to service the vehicle.■ Your vehicle may not pass the I/M test:● When the battery is disconnected or dischargedReadiness codes that are set during ordinary driving are erased. Also, depending on your driving habits, the readiness codes may not be completely set.● When the fuel tank cap is looseThe malfunction indicator lamp comes on as a temporary mal -function and your vehicle may not pass the I/M test.■ When the malfunction indicator lamp goes off after several driv -ing tripsThe error code in the OBD system will not be cleared unless the vehicle is driven 40 or more times.■ If your vehicle does not pass the I/M testContact your Lexus dealer to prepare the vehicle for re-testing.
