Jeep Wrangler: Yellow Indicator Lights / Sway Bar Indicator Light — If Equipped

Service Adaptive Cruise Control Warning Light — If Equipped

..

Wait To Start Light — If Equipped

This indicator light will illuminate for approximately two seconds when the ignition is turned to the ON/RUN position. Its duration may be longer based on colder operating conditions...

Other information:

Jeep Wrangler 2018-2026 Owners Manual: 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. The DEF injection system consists of the following components: DEF tank DEF pump DEF injector Electronically-heated DEF Lines NOx sensors Temperature sensors SCR catalyst The DEF injection system and SCR catalyst enable the achievement of diesel emissions requirements; while maintaining outstanding fuel economy, drivability, torque and power ratings...

Jeep Wrangler 2018-2026 Owners Manual: VEHICLE MAINTENANCE

An authorized dealer has the qualified service personnel, special tools, and equipment to perform all service operations in an expert manner. Service Manuals are available which include detailed service information for your vehicle. Refer to these Service Manuals before attempting any procedure yourself...