Jeep Wrangler 2018-2024 Owners Manual / SERVICING AND MAINTENANCE / VEHICLE MAINTENANCE / Diesel Exhaust Fluid

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...

Other information:

Jeep Wrangler 2018-2024 Owners Manual: ASSIST Call

The ASSIST Button is used to automatically connect you to any one of the following support centers: Roadside Assistance – If you get a flat tire, or need a tow, just push the ASSIST button and you’ll be connected to someone who can help...

Jeep Wrangler 2018-2024 Owners Manual: Child-Protection Door Lock System — Rear Doors

To provide a safer environment for small children riding in the rear seats, the rear doors are equipped with a Child-Protection Door Lock system. To use the system, open each rear door, use a flat blade screwdriver (or mechanical key) and rotate the dial to the lock or unlock position...

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.