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.


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 2018-2024 Owners Manual: 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. These systems are seamlessly integrated into your vehicle and managed by the Powertrain Control Module (PCM)...

Jeep Wrangler 2018-2024 Owners Manual: Off Road+ — If Equipped

Off Road+ Switch When activated, Off Road+ is designed to improve the user experience when using specific Off Road driving modes. To activate Off Road+, push the Off Road+ switch in the switch bank. The vehicle’s performance will improve depending on which Four-Wheel Drive (4WD) mode is activated...


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.


If either light remains on and does not flash, or there is a very fast flash rate, check for a defective outside light bulb.

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