Jeep Wrangler 2018-2026 Owners Manual / STARTING AND OPERATING / NORMAL OPERATION — DIESEL ENGINE / Cooling System Tips — Automatic Transmission

Jeep Wrangler: NORMAL OPERATION — DIESEL ENGINE / Cooling System Tips — Automatic Transmission

To reduce the potential for engine and transmission overheating in high ambient temperature conditions, take the following actions:

City Driving — When stopped, shift the transmission into NEUTRAL (N) and increase engine idle speed.
Highway Driving — Reduce your speed.
Up Steep Hills — Select a lower transmission gear.
Air Conditioning — Turn it off temporarily.

NOTE:

If the coolant temperature is too high, the A/C will automatically turn off.

Stopping The Engine

After full load operation, idle the engine for a few minutes before shutting it down. This idle period will allow the lubricating oil and coolant to carry excess heat away from the turbocharger...

Do Not Operate The Engine With Low Oil Pressure

If the low oil pressure warning light turns on while driving, stop the vehicle and shut down the engine as soon as possible. A chime will sound when the light turns on...

Other information:

Jeep Wrangler 2018-2026 Owners Manual: Air Bag Warning Light

This warning light will illuminate to indicate a fault with the air bag, and will turn on for four to eight seconds as a bulb check when the ignition is placed in the ON/RUN or ACC/ON/RUN position. This light will illuminate with a single chime when a fault with the air bag has been detected, it will stay on until the fault is cleared...

Jeep Wrangler 2018-2026 Owners Manual: Cold Weather Precautions

Operation in ambient temperature below 32°F (0°C) may require special considerations. The following charts suggest these options: Fuel Operating Range NOTE: Use “Ultra Low Sulfur Diesel Fuels (ULSD)” ONLY. Fuel Operating Range Chart *Number 1 ULSD Fuel should only be used where extended arctic conditions 0°F (-18°C) exist...

Turn Signals. Lane Change Assist — If Equipped

Turn Signals

Move the multifunction lever up or down to activate the turn signals. The arrows on each side of the instrument cluster flash to show proper operation.