Understanding dashboard warning lights in your Lexus LS is essential for maintaining vehicle safety and preventing costly damage. These lights alert you to potential issues ranging from minor notifications to critical problems that could lead to breakdowns or accidents. By recognizing them promptly, you can take appropriate actions like stopping the car or scheduling service, ensuring a smoother and safer driving experience.
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Red Warning Lights (Stop Immediately)
Brake System Warning
This light signals low brake fluid or a brake system failure, which can make stopping difficult. Stop the vehicle safely right away and call for roadside assistance or a mechanic to avoid accidents.
Engine Oil Pressure Warning
Low oil pressure might cause engine damage from lack of lubrication. Pull over immediately, turn off the engine, check oil levels, and add if needed before driving further.
High Coolant Temperature Warning
The engine is overheating, possibly due to low coolant or a faulty thermostat. Stop in a safe spot, let the engine cool, and seek professional help to prevent severe damage.
Battery Charging System Warning
There’s a problem with the vehicle’s charging system, like a failing alternator, which could drain the battery. Stop driving and have it inspected to avoid being stranded.
Electric Power Steering Warning
A malfunction in the power steering system makes steering harder and less safe. Stop the car and contact a service center immediately for repairs.
SRS Airbag Warning
This indicates an issue with the airbags or seat belt pretensioners, reducing protection in a crash. Stop and get the system checked by a dealer right away.
Master Warning Light
A general alert for serious vehicle malfunctions, often with a buzzer. Pull over safely and refer to the multi-information display for details, then seek service.
Low Brake Fluid Warning
Brake fluid is too low, risking brake failure. Stop the car, check fluid levels, and top up if possible, but get professional service urgently.
Transmission Overheat Warning
The transmission is too hot, possibly from heavy use or low fluid. Stop and allow it to cool before continuing, and visit a mechanic soon.
Seatbelt Reminder (Red Flashing)
Unfastened seatbelts for driver or passengers pose a safety risk in collisions. Stop and ensure all belts are buckled before proceeding.
Door Ajar Warning
A door or trunk is not fully closed, which could be dangerous at speed. Pull over, check and secure all doors, then resume driving.
Powertrain Malfunction Warning
Indicates a critical issue in the engine or hybrid powertrain. Stop the vehicle and contact a service center to diagnose and fix.
Steering Lock System Warning
The steering wheel lock has failed, potentially immobilizing the car. Stop safely and have it inspected immediately.
Immobilizer System Warning
The key or security system isn’t recognized, preventing the engine from starting. Stop and try a spare key; if unresolved, call for service.
Yellow/Amber Warning Lights (Action Required Soon)
Check Engine Light
This warns of issues like emission problems or sensor failures in the engine. Drive carefully to a service center for diagnostics and repairs soon.
ABS Warning
The anti-lock braking system isn’t working, which could lead to wheel lockup during hard stops. Have it checked by a mechanic as soon as possible.
Tire Pressure Monitoring System Warning
One or more tires have low pressure, affecting handling and fuel efficiency. Check and inflate tires to the recommended levels promptly.
ESP Stability Control Warning
The electronic stability program is malfunctioning, reducing control on slippery roads. Get the system inspected at a dealer soon.
Low Fuel Level Warning
Fuel is running low, with about 2.6 gallons left. Refuel at the next station to avoid running out.
Brake Pad Wear Warning
Brake pads are worn thin, reducing stopping power. Schedule a service to replace them before they fail completely.
DPF Warning (Diesel Particulate Filter)
The filter is clogged with soot, needing regeneration or cleaning. Drive at highway speeds if possible, or visit a service center.
Glow Plug Warning (Diesel Models)
Glow plugs aren’t heating properly for cold starts. Wait for the light to go off before starting, or get serviced if it persists.
Lane Departure Alert Warning
The system detects lane drifting or a sensor issue. Clean sensors and recalibrate if needed, or see a dealer.
Pre-Collision System Warning
The collision avoidance system is off or malfunctioning due to dirty sensors. Clean them and reset; seek service if it stays on.
Slip Indicator Light
Traction control or stability systems are active or faulty. Drive cautiously and have the vehicle inspected soon.
Low Washer Fluid Warning
Windshield washer fluid is low. Refill the reservoir to maintain clear visibility.
Service Reminder Light
It’s time for scheduled maintenance like an oil change. Book a service appointment promptly.
Adaptive Headlight System Warning
The automatic headlight leveling is faulty. Have it repaired to ensure proper lighting at night.
Green Information Lights (Information Only)
High Beam Indicator
High beam headlights are on for better visibility in dark conditions. No action needed unless you want to switch to low beams.
Turn Signal Indicator
Signals are active to indicate a turn or lane change. Turns off automatically after the maneuver.
Cruise Control Indicator
Cruise control is engaged, maintaining a set speed. Adjust or disengage as needed via controls.
Eco Mode Indicator
The vehicle is in eco mode for better fuel efficiency. Switch modes if you need more power.
Fog Light Indicator
Front or rear fog lights are on for low-visibility conditions. Turn off when no longer needed.
Parking Brake Indicator
The parking brake is engaged. Release it before driving.
Headlight On Indicator
Headlights are active. No action required, but check for auto mode if preferred.
Ready Indicator (Hybrid Models)
The hybrid system is ready to drive. Proceed normally.
EV Mode Indicator (Hybrid Models)
The vehicle is running on electric power only. Switches automatically based on conditions.
Sport Mode Indicator
The vehicle is in sport mode for enhanced performance. Switch back for normal driving.
Snow Mode Indicator
Snow mode is engaged for better traction on slippery surfaces. Use in appropriate conditions.
Seat Heater Indicator
Seat heaters are on. Adjust temperature or turn off when warm enough.
Windshield Defrost Indicator
The defroster is active to clear fog or ice. Turns off automatically or manually.
When looking at Lexus, make sure to check out our guides on models like the 1, 2, 3, and 4. Understanding dashboard warning lights is essential. Our expert reviews break down what each light means, highlighting common alerts for these models and what they could signal about underlying issues, so you’re never left guessing behind the wheel.
