Jeep Wrangler 2018-2026 Owners Manual / STARTING AND OPERATING / NORMAL OPERATION — DIESEL ENGINE / Cooling System Tips — Automatic Transmission / Do Not Operate The Engine With Failed Parts

Jeep Wrangler: Cooling System Tips — Automatic Transmission / Do Not Operate The Engine With Failed Parts

All engine failures give some warning before the parts fail. Be on the alert for changes in performance, sounds, and visual evidence that the engine requires service. Some important clues are:

Engine misfiring or vibrating severely
Sudden loss of power
Unusual engine noises
Fuel, oil or coolant leaks
Sudden change, outside the normal operating range, in the engine operating temperature
Excessive smoke
Oil pressure drop

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...

ENGINE BLOCK HEATER — IF EQUIPPED

The engine block heater warms the engine, and permits quicker starts in cold weather. Connect the cord to a standard 110-115 Volt AC electrical outlet with a grounded, three-wire extension cord...

Other information:

Jeep Wrangler 2018-2026 Owners Manual: Instrument Cluster Descriptions

Tachometer Indicates the engine speed in revolutions per minute (RPM x 1000). CAUTION! Do not operate the engine with the tachometer pointer in the red area. Engine damage will occur. Temperature Gauge The temperature gauge shows engine coolant temperature...

Jeep Wrangler 2018-2026 Owners Manual: 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...

Basic Voice Commands

The basic Voice Commands below can be given at any point while using your Uconnect system. Push the VR button on the steering wheel. After the beep, say:

“Cancel” to stop a current voice session. “Help” to hear a list of suggested Voice Commands. “Repeat” to listen to the system prompts again.