Service Engine Soon
If the service engine soonindicator light stays illuminatedafter you start the engine, itindicates that the On Board Diagnosticssystem (OBD) has detected a malfunctionof the vehicle emissions control system.Refer to On Board Diagnostics (OBD) inthe Fuel and Refueling chapter for moreinformation about having your vehicleserviced. See Emission Control System(page 156).
If the light is blinking, engine misfire isoccurring which could damage yourcatalytic converter. Drive in a moderatefashion (avoid heavy acceleration anddeceleration) and have your vehicleserviced immediately.
WARNING
Under engine misfire conditions,excessive exhaust temperaturescould damage the catalyticconverter, the fuel system, interior floorcoverings or other vehicle components,possibly causing a fire. Have an authorizeddealer service your vehicle immediately.
The service engine soon indicator lightilluminates when you first switch on theignition before engine start to check thebulb and to indicate whether the vehicleis ready for Inspection/Maintenance (I/M)testing.
Normally, the service engine soon lightstays on until you crank the engine, thenturns itself off if no malfunctions arepresent. However, if after 15 seconds theservice engine soon light blinks eight times,it means that the vehicle is not ready forI/M testing. See Emission ControlSystem (page 156).
Stability Control System
Displays when theAdvanceTrac®/Traction controlis active. If the light remains on,have the system serviced immediately.See Using Stability Control (page 177).
Stability Control System Off
Illuminates when you disableAdvanceTrac®/Traction. SeeUsing Stability Control (page177).
Transmission Tow/Haul (If Equipped)
Illuminates when you activatethe tow/haul feature. If the lightflashes steadily, have the systemserviced immediately. Damage to thetransmission could occur. See AutomaticTransmission (page 159).
4X2
Illuminates momentarily whenyou engage two-wheel drivehigh. If the light fails to displayor remains on when the ignition is on, havethe system serviced immediately by anauthorized dealer.
4X4 Auto
Illuminates when you engage thefour-wheel drive system. If thelight fails to display or remainson when the ignition is on, have the systemserviced immediately by an authorizeddealer.
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Calculating Fuel Economy
Do not measure fuel economy during thefirst 1,000 mi (1,600 km) of driving (this isyour engine’s break-in period). A moreaccurate measurement is obtained after2,000 mi (3,200 km) to 3,000 mi(4,800 km). Also, fuel expense, frequencyof fill ups or fuel gauge readings are notaccurate ways to measure fuel economy.
1.Fill the fuel tank completely and recordthe initial odometer reading.
2. Each time you fill the fuel tank, recordthe amount of fuel added.
3. After at least three fill ups, fill the fueltank and record the current odometerreading.
4. Subtract your initial odometer readingfrom the current odometer reading.
To calculate L/100 km (liters per 100kilometers) fuel consumption, multiply theliters used by 100, then divide by kilometerstraveled. To calculate MPG (miles pergallon) fuel consumption, divide milestraveled by gallons used.
Keep a record for at least one month andrecord the type of driving (city or highway).This provides an accurate estimate of yourvehicle’s fuel economy under currentdriving conditions. Keeping records duringsummer and winter will show howtemperature impacts fuel economy.
Conditions
•Heavily loading your vehicle reducesfuel economy.
•Carrying unnecessary weight in yourvehicle may reduce fuel economy.
•Adding certain accessories to yourvehicle such as bug deflectors, rollbarsor light bars, running boards and skiracks may reduce fuel economy.
•Using fuel blended with alcohol maylower fuel economy.
•Fuel economy may decrease with lowertemperatures.
•Fuel economy may decrease whendriving short distances.
•You will get better fuel economy whendriving on flat terrain than when drivingon hilly terrain.
EMISSION CONTROL SYSTEM
WARNINGS
Do not park, idle, or drive your vehiclein dry grass or other dry ground cover.The emission system heats up theengine compartment and exhaust system,which can start a fire.
Exhaust leaks may result in entry ofharmful and potentially lethal fumesinto the passenger compartment. Ifyou smell exhaust fumes inside yourvehicle, have your dealer inspect yourvehicle immediately. Do not drive if yousmell exhaust fumes.
Your vehicle is equipped with variousemission control components and acatalytic converter that will enable yourvehicle to comply with applicable exhaustemission standards. To make sure that thecatalytic converter and other emissioncontrol components continue to workproperly:
•Use only the specified fuel listed.
•Avoid running out of fuel.
•Do not turn off the ignition while yourvehicle is moving, especially at highspeeds.
•Have the items listed in scheduledmaintenance information performedaccording to the specified schedule.
The scheduled maintenance items listedin scheduled maintenance information areessential to the life and performance ofyour vehicle and to its emissions system.
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Fuel and Refueling
