Jeep Wrangler 2018-2024 Owners Manual / STARTING AND OPERATING / REFUELING THE VEHICLE — DIESEL ENGINE (IF EQUIPPED) / Diesel Exhaust Fluid / Diesel Exhaust Fluid Storage

Jeep Wrangler: Diesel Exhaust Fluid / Diesel Exhaust Fluid Storage

Diesel Exhaust Fluid (DEF) is considered a very stable product with a long shelf life. If DEF is kept in temperatures between 10° and 90°F (-12° and 32°C), it will last a minimum of one year.

DEF is subject to freezing at the lowest temperatures. For example, DEF may freeze at temperatures at or below 12°F (-11°C). The system has been designed to operate in this environment.

NOTE:

When working with DEF, it is important to know that:

Any containers or parts that come into contact with DEF must be DEF compatible (plastic or stainless steel). Copper, brass, aluminum, iron or non-stainless steel should be avoided as they are subject to corrosion by DEF.
If DEF is spilled, it should be wiped up completely.

System Overview

This vehicle is equipped with a Diesel Exhaust Fluid (DEF) injection system and a Selective Catalytic Reduction (SCR) catalyst to meet the emission requirements...

Adding Diesel Exhaust Fluid

The DEF gauge (located on the instrument cluster display) will display the level of DEF remaining in the tank. NOTE: Driving conditions (altitude, vehicle speed, load, etc...

Other information:

Jeep Wrangler 2018-2024 Owners Manual: Four-Position Transfer Case — If Equipped

Four-Wheel Drive Gear Selector The transfer case provides four mode positions: 2H (2WD High) — Two-Wheel Drive High Range 4H (4WD High) —Four-Wheel Drive High Range N (Neutral) 4L (4WD Low) — Four-Wheel Drive Low Range For additional information on the appropriate use of each transfer case mode position, see the information below: 2WD High Two-Wheel Drive High Range — This range is for normal street and highway driving on dry, hard surfaced roads...

Jeep Wrangler 2018-2024 Owners Manual: Disconnecting The Jumper Cables

Disconnect the negative (-) end of the jumper cable from the engine ground of the vehicle with the discharged battery. Disconnect the opposite end of the negative (-) jumper cable from the negative (-) post of the booster battery. Disconnect the positive (+) end of the jumper cable from the positive (+) post of the booster battery...

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.