Jeep Wrangler 2018-2025 Owners Manual / STARTING AND OPERATING / STARTING THE ENGINE — DIESEL ENGINE (IF EQUIPPED) / Extreme Cold Weather

Jeep Wrangler: STARTING THE ENGINE — DIESEL ENGINE (IF EQUIPPED) / Extreme Cold Weather

The engine block heater is a resistance heater installed in the water jacket of the engine. It requires a 110–115 Volt AC electrical outlet with a grounded, three-wire extension cord. Its use is recommended for environments that routinely fall below -10°F (-23°C). It should be used when the vehicle has not been running overnight or longer periods and should be plugged in two hours prior to start. Its use is required for cold starts with temperatures under -20°F (-28°C).

NOTE:

The engine block heater cord is a factory installed option. If your vehicle is not equipped, heater cords are available from an authorized Mopar® dealer.

A 12 Volt heater built into the fuel filter housing aids in preventing fuel gelling. It is controlled by a built-in thermostat.
A Diesel Pre-Heat system both improves engine starting and reduces the amount of white smoke generated by a warming engine.

Automatic Transmission

S..

Normal Starting

Observe the instrument cluster lights when starting the engine. NOTE: Normal starting of either a cold or a warm engine is obtained without pumping or pressing the accelerator pedal...

Other information:

Jeep Wrangler 2018-2025 Owners Manual: To Turn Off The Engine Using ENGINE START/STOP Button

Place the gear selector in PARK, then push and release the ENGINE START/STOP button. The ignition will return to the OFF mode. If the gear selector is not in PARK (with vehicle stopped) and the ENGINE START/ STOP button is pushed once, the transmission will automatically select PARK and the engine will turn off while the ignition will remain in the ACC mode (NOT the OFF mode)...

Jeep Wrangler 2018-2025 Owners Manual: Oil Pressure Warning Light

This warning light will illuminate, and a chime will sound, to indicate low engine oil pressure. If the light and chime turn on while driving, safely stop the vehicle and turn off the engine as soon as possible. After the vehicle is safely stopped, restart the engine and monitor the Oil Pressure Warning Light...

Bi-Level Mode

Jeep Wrangler. Bi-Level Mode Air comes from the instrument panel outlets and floor outlets. A slight amount of air is directed through the defrost and side window demister outlets.