Understanding dashboard warning lights on your Lexus GS is essential for maintaining vehicle safety and preventing costly damage. These lights alert you to potential issues ranging from minor notifications to serious problems that could lead to breakdowns or accidents.
By recognizing and responding promptly, you can ensure a safer drive and extend your car’s lifespan.
Quick Navigation
Red Warning Lights (Stop Immediately)
Brake System Warning
This light signals a problem with the brakes, such as low fluid or a failure in the system. Pull over safely right away, avoid driving, and call for roadside assistance or a mechanic to inspect and fix it.
Oil Pressure Warning
Indicates low engine oil pressure, which could cause engine damage if ignored. Stop the vehicle immediately, check the oil level, add oil if needed, and don’t drive until the issue is resolved by a professional.
Battery Charge Warning
Shows the battery isn’t charging properly, possibly due to a faulty alternator or belt. Stop driving as soon as safe, turn off non-essential electronics, and have the charging system checked at a service center.
Coolant Temperature Warning
Alerts to overheating engine coolant, often from leaks or a failing thermostat. Pull over, let the engine cool, check coolant levels, and seek mechanic help before continuing.
Power Steering Warning
Means there’s an issue with the power steering system, making steering difficult or unsafe. Stop the car in a safe spot and contact a service center for repairs.
Airbag System Warning
Indicates a fault in the airbag system, which might prevent airbags from deploying in a crash. Stop and have it inspected immediately to ensure passenger safety.
Seatbelt Reminder
Flashes if seatbelts aren’t fastened, reminding occupants to buckle up. Stop and ensure all passengers are secured before proceeding, as it’s critical for safety.
Door Ajar Warning
Signals an open door or trunk, which could be hazardous while driving. Pull over, close all doors securely, and confirm the light turns off.
Low Brake Fluid Warning
Points to low brake fluid levels, risking brake failure. Stop immediately, check and top up fluid if possible, then visit a mechanic for a full check.
Transmission Overheat Warning
Warns of high transmission temperature, possibly from heavy load or low fluid. Stop, allow cooling, and get it serviced to avoid damage.
Engine Overheat Warning
Similar to coolant but specific to engine temp; caused by cooling system failure. Pull over, shut off engine, and call for help after it cools.
Master Warning Light
A general red alert for critical issues; check the message display. Stop driving and diagnose the specific problem via service.
Hybrid System Warning (for GS hybrid models)
Indicates a fault in the hybrid battery or system. Stop immediately and have a Lexus dealer inspect to prevent system failure.
Steering Lock Warning
Signals a problem with the electronic steering lock. Stop and try restarting; if persistent, tow to a service center.
Low Fuel Pressure Warning
Alerts to insufficient fuel pressure, risking engine stall. Stop, refuel if low, or seek mechanical help for pump issues.
Yellow/Amber Warning Lights (Action Required Soon)
Check Engine Light
This warns of an engine or emissions issue, like a faulty sensor or misfire. Schedule a service visit soon to diagnose and repair, as it could affect performance.
ABS Warning
Indicates a problem with the anti-lock braking system, reducing braking effectiveness. Drive cautiously and get it checked at a service center promptly.
Tire Pressure Monitoring System (TPMS) Warning
Shows low tire pressure in one or more tires, risking blowouts or poor handling. Check and inflate tires soon, then reset the system if needed.
Vehicle Stability Control (VSC) Warning
Alerts to an issue with stability control, which helps prevent skids. Have it inspected soon to maintain safe handling.
Brake Pad Wear Warning
Signals worn brake pads needing replacement. Schedule a brake inspection and replacement soon for safe stopping.
Transmission Warning
Indicates a gearbox issue, like slipping or sensor fault. Limit driving and visit a mechanic for diagnostics.
Diesel Particulate Filter (DPF) Warning (if applicable)
For diesel models, it means the filter is clogged. Drive at higher speeds if safe, or get it cleaned at a service center.
Electronic Stability Program (ESP) Warning
Similar to VSC, warns of stability system malfunction. Address it promptly for better vehicle control.
Glow Plug Indicator (for diesel variants)
Shows glow plugs are heating for cold starts. Wait for it to turn off before starting; if it stays on, check for faults.
Adaptive Front Lighting System (AFS) Warning
Indicates a problem with adaptive headlights. Have lights inspected soon for optimal night visibility.
Lane Departure Warning
Alerts if the system detects unintentional lane drift. Recalibrate or service if it persists.
Blind Spot Monitor Warning
Signals an issue with blind spot detection. Get it fixed soon to maintain awareness of surrounding vehicles.
Green Information Lights (Information Only)
High Beam Indicator
Shows high beam headlights are on for better visibility at night. No action needed; toggle as required for conditions.
Turn Signal Indicator
Flashes when turn signals are active, indicating direction to others. Ensures signals work; no further action.
Cruise Control Indicator
Confirms cruise control is engaged, maintaining set speed. Adjust speed or disengage as needed.
Eco Mode Indicator
Indicates eco driving mode is active, optimizing fuel efficiency. Switch modes based on driving needs.
Sport Mode Indicator
Shows sport mode is on for enhanced performance. No action; select for dynamic driving.
Headlight On Indicator
Reminds that headlights are activated. Useful in low light; turn off when not needed to save battery.
Fog Light Indicator
Confirms front or rear fog lights are on for poor visibility. Use only in fog; turn off otherwise.
Parking Brake Indicator
Shows the parking brake is engaged. Release before driving to avoid wear.
Seat Heater Indicator
Indicates seat heaters are on for comfort. Adjust levels or turn off as preferred.
Windshield Defrost Indicator
Confirms defroster is active to clear windows. Use in cold or humid conditions.
Hybrid Ready Indicator (for GS hybrid)
Means the hybrid system is ready to drive. No action; proceed normally.
EV Mode Indicator (for hybrids)
Shows electric-only mode is active for quiet, efficient driving. Switches automatically.
Regen Braking Indicator
Indicates regenerative braking is capturing energy. Informational for hybrid efficiency.
Odometer/Trip Meter Indicator
Displays mileage information. Useful for tracking; reset trip as needed.
When looking at Lexus, make sure to check out our guides on models like the Lexus ES, Lexus IS, Lexus GX, and Lexus LX. 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.
