Jeep Wrangler: VEHICLE MAINTENANCE / Diesel Exhaust Fluid

Diesel Exhaust Fluid (DEF) sometimes known simply by the name of its active component, UREA—is a key component of Selective Catalytic Reduction (SCR) systems, which help diesel vehicles meet stringent emission regulations. DEF is a liquid reducing agent that reacts with engine exhaust in the presence of a catalyst to convert smog-forming nitrogen oxides (NOx) into harmless nitrogen and water vapor.

    Intervention Regeneration Strategy — Message Process Flow

    This engine meets all required diesel engine emissions standards. To achieve these emissions standards, your vehicle is equipped with a state-of-the-art engine and exhaust system...

    Accessory Drive Belt Inspection

    WARNING! Do not attempt to inspect an accessory drive belt with vehicle running. When working near the radiator cooling fan, disconnect the fan motor lead...

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    Jeep Wrangler 2018-2024 Owners Manual: Diesel Fuel Specifications


    This diesel engine has been developed to take advantage of the high energy content and generally lower cost No. 2 Ultra Low Sulfur diesel fuel or No. 2 Ultra Low Sulfur climatized diesel fuels. NOTE: If you accidentally fill the fuel tank with gasoline on your diesel vehicle, do not start the engine...

    Jeep Wrangler 2018-2024 Owners Manual: Front Air Bags


    This vehicle has front air bags and lap/shoulder belts for both the driver and front passenger. The front air bags are a supplement to the seat belt restraint systems. The driver front air bag is mounted in the center of the steering wheel. The passenger front air bag is mounted in the instrument panel, above the glove compartment...

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    Automatic Headlights — If Equipped, Lights-On Reminder

    Automatic Headlights

    This system automatically turns the headlights on or off according to ambient light levels. To turn the system on, rotate the headlight switch clockwise to the last detent for automatic headlight operation. When the system is on, the headlight time delay feature is also on. This means the headlights will stay on for up to 90 seconds after you place the ignition into the OFF position. To turn the automatic system off, move the headlight switch out of the AUTO position.

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