It is possible to diagnose most Lexus warning lights with an All System OBD-II Scanner for Lexus. The diagnostic port is located under the dashboard on the driver's side.
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ABS warning light The ABS warning light indicates the malfunctioning of the ABS and brake assist system. It is usually caused by a faulty ABS wheel speed sensor or a bad clock spring. Traction control will be disabled, as well. Use an ABS Scanner to read fault codes and find out why your Lexus ABS light is on. |
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Check Engine CEL | MIL Malfunction Indicator Lamp If the check engine light comes on, it means that the Onboard Diagnsoittc System (OBD) has detected a problem with the engine, transmission, or EVAP system. If the check engine light is always on (solid), you may be able to continue your journey. If the check engine light is flashing, it means a misfire has been detected in one of the cylinders. Do not operate the vehicle for more than a few minutes if the check engine light is flashing, or you will damage the engine and catalytic converter. The engine may overheat too and blow a head gasket. There are hundreds of possibilities. Read fault codes with an OBD-II scanner as possible. |
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Airbag Light | SRS warning light When the airbag warning light comes on, it indicates a problem with the Supplement Restraint System, such as a faulty passenger weight sensor. The airbag may not deploy if you get in an accident. It can be triggered by low voltage, dead battery, faulty passenger sensor, bad clock spring, damaged wires. To diagnose Lexus airbag light, you will need a diagnostic scanner for the airbag system. Generic OBD-II scanners can not read airbag codes and will not show any fault codes. |
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Engine Overheating | High Coolant Temperature This light is on or flashes to let your know that the engine is overheating. Pullover immediately turns off the engine and lets it cool down. Once the engine has cooled down, check the engine coolant level. |
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Tire pressure warning light | TPMS This is the Tire Pressure Monitoring System (TPMS) light. When the light turns on, it is an indication that you have a:
Stop immediately and check to make sure you don't have a flat tire. If the tire pressure is low, stop at the lowest gas station to add air. Alternatively, you can get a 12-volt tire inflator and keep it in your car. When the indicator light turns on after blinking for around 1 minute, there is a malfunction in the tire pressure warning system. |
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Windshield Washer Fluid This light means that the windshield washer fluid level is low. There is no water to spray on the windshield when you press the wiper switch. At your next stop, open the hood, locate the windshield fluid reservoir and add windshield washer fluid. The windshield washer fluid reservoir cap has the same symbol on top. Do not use plain water. |
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VSC Light VSC stands for Vehicle Stability Control. Lexus VSC system helps stabilize the vehicle during emergency maneuvers. It works in conjunction with the ABS and brake system. Use an All System Lexus Scanner to diagnose the VSC and traction control problems. When the light stays on, it means that there is malfunctioning in:
Common problems include faulty ABS sensor, clock spring, ABS pump, etc. It is possible to continue driving but do so with caution. Stability control and traction control systems are disabled. |
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Slip Indicator If the slip indicator flashes, it means the vehicle is losing traction. Slow down and drive more carefully. If the slip indicator stays on, it means the system is disabled. Check engine light may also come when there is a problem to remind you that it is time to get your car diagnosed. |
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How to check the engine coolant level.
Monitor engine temperature by looking at the temperature gauge. The needle needs to stay in the middle of the gauge. Do not drive or keep the engine running if the engine is overheating. |
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Battery Warning Light When the Lexus battery light stays on or flashes, there is a problem with the charging system. Depending on the problem, the car may run for another ten to thirty minutes then shut off. You may have a bad alternator, voltage regulator, damaged wires, loose battery connection, etc. |
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Engine Oil Light | Oil PressOil Light | Oil Pressure When the oil light comes on, the engine oil pressure is very low, or the engine oil level is low. The oil light may always be on, red or yellow, or may flash. Pull over as soon as it is safe to do so. Turn off the engine check the oil level, and add oil if needed. Do not operate the vehicle with this light on. |
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Exclamation mark light | Master warning light This is a master warning light that does not provide much information on its own. It simply says that there is a fault in the Master Warning System. Typically comes on at the same time as at least one other warning light. |
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Brake Warning If the brake light comes on when driving, it means:
Stop the vehicle as soon as it is safe to do so and check the brake fluid level. It can be dangerous and unsafe to drive the vehicle with the brake light on. |
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Exclamation mark light | Master warning light This is a master warning light that does not provide much information on its own. It simply says that there is a fault in the Master Warning System. Typically comes on at the same time as at least one other warning light. |
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Brake Light - Yellow The yellow brake warning light means:
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Pop Up Hood warning light When the Pop Up Hood warning light comes on, it shows that the Pop Up Hood system has operated. It usually is activated from an accident or can also happen during hard braking.
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Brake Override System | Drive-Start Control When there is a buzzer sound, it means: • Malfunctioning of Brake Override system • Operation of Drive-Start control • Malfunctioning of Drive-Start control • Parking support Brake function is operating (for static objects) When there is no buzzer sound, it means • A brake override system is in operation • Release the accelerator and depress the brake |
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Electric power steering system The steering wheel + exclamation light may be yellow or red. It means that there is a malfunctioning of the Electric Power Steering (EPS) system. The vehicle may be hard to steer. |
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Low fuel level warning light The warning light indicates that the amount of fuel remaining in the vehicle is approximately three gallons or less. |
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Driver’s and passenger’s + seat belt The reminder light warns the driver or/and the front seat passenger to fasten the seat belts. In case the front passenger seat is occupied, the seat belt needs to be fastened. |
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Rear passengers’ seat belt reminder lights The reminder light warns that the rear passengers have not fastened their seat belts. |
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Lane tracing Assist (LTA) The indicator shows that the Lane tracing Assist (LTA) is malfunctioning. |
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Intuitive parking assists OFF. The indicator light is coming on means that the intuitive parking assist function is malfunctioning. It indicates that the system is unavailable temporarily. This might be due to the sensor being covered with dirt or ice, etc. |
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Rear Cross-Traffic Alert (RCTA) If the light comes on, it indicates that the Rear Cross Traffic Alert (RCTA) is malfunctioning or turned off. |
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Rear Camera Detection (RCD) When you hear a buzzer sound • This means that the Rear Camera Detection (RCD) is malfunctioning When you don’t hear the buzzer sound • This means that the RCD function can’t be used temporarily. This may be due to a dirty camera etc. |
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PKSB OFF When you hear a buzzer sound: • It means that the Parking Support Brake (PKSB) system is malfunctioning When you don’t hear the buzzer • This indicates that the system is not available temporarily. It can be due to a dirty sensor PCS warning light In the case of the buzzer sounds: • It means that there is a malfunctioning of the Pre-collision System (PCS) When buzzer doesn’t sound: • This means that the system is temporarily not working and requires corrective actions If the Vehicle Stability Control (VSC) system or PCS is disabled, the PCS warning light will get illuminated |
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Parking Brake Flashes The illuminated indicator means that the parking brake system is malfunctiobrake system is malfunctioning. |
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Brake hold operated If this indicator is on, it means that the Brake hold system is malfunctioning. |
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Turn Signal Light This will flash when you use the turn signal lever/switch:
Once you make your turn, it will click back in the middle, and the light will turn off. If the indicator flashes fast as usual, probably one of your bulbs is not working. If this occurs, stop as soon as possible and inspect, then replace the not working bulb. |
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Headlight This will light up once the headlight switch is turned on. The headlight can be operated manually or automatically, depending on user discretion. |
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Taillight This will light up when the tail light is on, together with daytime running light, side marker lights, parking light, and license plate light. |
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Headlight High beam It indicates that the headlights are in high beam mode. All lights mentioned above are on except for the daytime running light. |
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Auto High Beam(AHB) Accompanied by the camera sensor located at the windshield, this function assesses the vehicle's lights' brightness ahead. It automatically turns the high beam on and off as needed. |
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Pre-Collision System (PCS) Warning Light Pre Collision System is a feature designed to avoid severe damage to your vehicle. The system is automatically enabled whenever the ignition is on. If disabled, a message will appear on the multi-information display, and the indicator lights will turn off. |
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Cruise Control is a system that automatically controls the speed of your vehicle. Once this light indicator is on, it will maintain your current speed even without stepping on the accelerator pedal. It will turn off once you hit the brakes. |
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Dynamic Radar Cruise Control The same function as a Cruise Control, but this time it's from a vehicle to vehicle control. It automatically accelerates, decelerates, and stops to match the vehicle's speed changes in front of you. |
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Cruise Control “SET” This will appear when you set the cruise control on the speed you want when pressing the button while running. The speed will remain at that speed. |
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BSM outside rearview mirror (Blind Side Monitor) This indicator flashes when a fast-approaching vehicle is going to your blind side. This indicates the feature uses the vehicle bumper's radar sensors that help the driver move from left to right when driving. When driving, you won't see some vehicle parts, but this feature notifies the driver if there's a vehicle in its blind spot. |
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Intuitive parking assists OFF. This will appear when the intuitive parking assist is turned off; it will disable the parking sensor when you park. |
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Vehicle Stability Control VSC OFF VSC is the driving support of the vehicle; it helps stabilize/Control the vehicle when driving, so this will show if the system is off |
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High Mode When the High mode indicator is on, the vehicle's height will increase from its normal stance. |
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Push Button Start This will appear on the panel when you are about to start the car. When you press the brake pedal, this will appear, and the engine can be started. |
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Parking Brake This will appear when the shift lever is set to Park, which means the Parking Brake functions. |
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Brake Hold Standby This keeps the brake applied when the shift is on D, M, or N for a smooth Start roll. |
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Eco Driving Indicator Light This indicates that your driving speed is in Economy Fuel Saving Mode. |
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Low Outside temperature This Display the Outside temperature of the Surroundings, Range of -40°F (-40°C) to 122°F (50°C) |
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Security Security or immobilizer system, this light will flash when the engine is turned off, which means that the vehicle's security is on. |
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Air Bag On/Off (40) Indicator of Air Bag if it's armed or not. |
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AWD | 4x4 When this light stays on, all four wheels are active. Also known as all-wheel drive. If light flashes, there is a problem, and the AWD can not be activated. |
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Adaptive Front Lighting AFS Light AFS stands for the Adaptive Front Lighting System, also known as Automatic Headlight Adjusting. It adjusts the headlights based on the input from the steering wheel. For example, as you make a turn, the headlight projector turns to lights up the corner where you are turning. AFS OFF means there is a problem with the adaptive headlight adjustment system. |
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Service Reminder The vehicle is due to regular maintenance such as oil change. This does not mean there is a problem, just routine maintenance. |
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Transmission Temperature This light means that the automatic transmission may have overheated. This light often comes on if you are towing. Pull over as soon as it is safe to do so and allow the vehicle to cool down. |
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Automatic Limited Slip Differential (LSD) A limited-slip differential will automatically lock when it detects wdifferential will automatically lock when it detects wheel slip. |
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Hybrid Ready This means all conditions are met, and the hybrid model is ready to activate. Engine auto start/stop-starts to activate when you stop. |
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EV Mode The vehicle is operating in electric mode. |
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EV Operation The vehicle is operating in electric mode. |
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Hybrid Battery Overheat The lithium-ion cells of the hybrid battery have overheated. |
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LED Headlamp Out The headlight is burned out, or the headlight auto-adjusts mechanism is faulty. |
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SPORT Drive Mode Transmission and engine are operating in sport mode for best performance. Engine output is tuned for maximum output, while the transmission may stay in gear longer before shifting. |
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CUSTOM Drive Driving mode customized for the current driver. |
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Electronically Controlled Transmission Setting
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Turn Assist Indicator |
This is the end of Lexus's warning lights, symbols, and what they mean. In the next section, you will see warning lights on various Lexus instrument clusters.
Lexus Warning Lights by Model
You can help improve this article by describing any of these lights in the comments section.
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