If one or more of these conditions occurs, changethe fuel brand used. It will require at least onefull tank of the proper fuel to turn the light off.See Gasoline Octane on page 6-5.If none of the above have made the light turn off, yourdealer/retailer can check the vehicle. The dealer/retailerhas the proper test equipment and diagnostic tools tofix any mechanical or electrical problems that might havedeveloped.Emissions Inspection and MaintenanceProgramsSome state/provincial and local governments have ormight begin programs to inspect the emission controlequipment on the vehicle. Failure to pass this inspectioncould prevent getting a vehicle registration.Here are some things to know to help the vehicle passan inspection:• The vehicle will not pass this inspection if the checkengine light is on with the engine running, or if thekey is in ON/RUN and the light is not on.• The vehicle will not pass this inspection if theOBD II (on-board diagnostic) system determinesthat critical emission control systems have not beencompletely diagnosed by the system. The vehiclewould be considered not ready for inspection.This can happen if the battery has recently beenreplaced or if the battery has run down. Thediagnostic system is designed to evaluate criticalemission control systems during normal driving. Thiscan take several days of routine driving. If thishas been done and the vehicle still does not passthe inspection for lack of OBD II system readiness,your dealer/retailer can prepare the vehicle forinspection.3-38
