Jeep Wrangler 2018-2025 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 2018-2025 Owners Manual: Heated Mirrors and Power Mirrors — If Equipped

Heated Mirrors These mirrors are heated to melt frost or ice. This feature will be activated whenever you turn on the rear window defroster (if equipped). Power Mirrors Power Mirror Switch The power mirror controls consist of mirror select buttons and a four-way mirror control switch...

Jeep Wrangler 2018-2025 Owners Manual: Ignition Park Interlock

This vehicle is equipped with an Ignition Park Interlock which requires the transmission to be in PARK before the ignition can be turned to the OFF mode. This helps the driver avoid inadvertently leaving the vehicle without placing the transmission in PARK...

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.