Lexus ES350 2022 Warning Light and Buzzer Sound User Manual
Introduction
The warning messages displayed on your vehicle’s display system are intended to inform you of any conditions or potential problems that need your immediate attention. Understanding these alerts will help you respond appropriately and keep your car performing at its best. You can read in-depth explanations of the warning messages that might appear on your Lexus ES350’s display throughout this manual. We’ve organized these messages into categories for your convenience and included thorough explanations of how to understand and act upon each warning.
It is essential to read and comprehend these warning messages because they might point out a problem, the need for maintenance, or a possible safety hazard. Knowing these messages will enable you to make wise choices while driving, ensuring both your safety and the safety of your passengers. Keep in mind that your Lexus ES350 is outfitted with cutting-edge technology and complex systems, and this user manual will act as your road map for navigating and correctly interpreting the warning messages. When a warning message appears, please refer to this manual and follow the instructions.
Warning Light and Buzzer Sound
If a warning light turns on or a warning buzzer sounds
Calmly perform the following actions if any of the warning lights comes on or flashes. If a light comes on or flashes, but then goes off, this does not necessarily indicate a malfunction in the system. However, if this continues to occur, have the vehicle inspected by your Lexus dealer.
Actions to the warning lights or warning buzzers
Brake system warning light (warning buzzer)
| Warning Light | Details/Actions |
(U.S.A.)
(red) (Canada) |
Indicates that:
|
Brake system warning light (warning buzzer)
| Warning Light | Details/Actions |
(yellow) |
Indicates a malfunction in the parking brake system Have the vehicle inspected by your Lexus dealer immediately. |
High coolant temperature warning light* (warning buzzer)
| Warning Light | Details/Actions |
|
Indicates that the engine coolant temperature is too high Immediately stop the vehicle in a safe place. |
This light illuminates on the multi-information display.
Charging system warning light* (warning buzzer)
| Warning Light | Details/Actions |
 |
Indicates a malfunction in the vehicle’s charging system Immediately stop the vehicle in a safe place and contact your Lexus dealer. |
*: This light illuminates on the multi-information display.
| Warning Light | Details/Actions |
 |
Indicates that the engine oil pressure is too low Immediately stop the vehicle in a safe place and contact your Lexus dealer. |
*: This light illuminates on the multi-information display.
Malfunction indicator lamp (warning buzzer)
| Warning Light | Details/Actions |
(U.S.A.)
(Canada) |
Indicates a malfunction in:
Immediately stop the vehicle in a safe place and contact your Lexus dealer. |
SRS warning light (warning buzzer)
| Warning Light | Details/Actions |
 |
Indicates a malfunction in:
Have the vehicle inspected by your Lexus dealer immediately. |
ABS warning light (warning buzzer)
| Warning Light | Details/Actions |
(U.S.A.) or (Canada) |
Indicates a malfunction in:
Have the vehicle inspected by your Lexus dealer immediately. |
Inappropriate pedal operation warning light* (warning buzzer)
| Warning Light | Details/Actions |
|
When a buzzer sounds:
When a buzzer does not sound:
|
This light illuminates on the multi-information display.
Electric power steering system warning light (warning buzzer)
| Warning Light | Details/Actions |
(red)
(yellow) |
Indicates a malfunction in the EPS (Electric Power Steering) system
Have the vehicle inspected by your Lexus dealer immediately. |
Low fuel level warning light
| Warning Light | Details/Actions |
 |
2WD models: Indicates that remaining fuel is approximately 2.4 gal. (9 L, 2.0 Imp.gal.) or less AWD models: Indicates that remaining fuel is approximately 2.1 gal. (8 L, 1.8 Imp gal.) or lessRefuel the vehicle. |
Driver’s and front passenger’s seat belt reminder light (warning buzzer)
| Warning Light | Details/Actions |
 |
Warns the driver and/or front passenger to fasten their seat belts. Fasten the seat belt. If the front passenger’s seat is occupied, the front passenger’s seat belt also needs to be fastened to make the warning light (warning buzzer) turn off. |
Driver’s seat belt warning buzzer
The driver’s seat belt warning buzzer sounds to alert the driver that his or her seat belt is not fastened. Once the engine switch is turned to IGNITION ON mode, the buzzer sounds. If the seat belt is still unfastened, the buzzer sounds intermittently for a certain period of time after the vehicle reaches a certain speed.
Front passenger’s seat belt warning buzzer
The front passenger’s seat belt warning buzzer sounds to alert the front passenger that his or her seat belt is not fastened. If the seat belt is unfastened, the buzzer sounds intermittently for a certain period of time after the vehicle reaches a certain speed.
Rear passengers’ seat belt reminder lights*1 (warning buzzer)
| Warning Light | Details/Actions |
 |
Warns the rear passengers to fasten their seat belts Fasten the seat belt. |
- This light illuminates on the multi-information display. Regardless of whether or not a rear passenger is present, if the engine switch is turned to IGNITION ON mode with the rear seat belts unfastened, this light will also illuminate for a certain period of time.
- Rear passengers’ seat belt warning buzzer: The rear passengers’ seat belt warning buzzer sounds to alert the rear passenger that his or her seat belt is not fastened. If the seat belt is unfastened, the buzzer sounds intermittently for a certain period of time, after the seat belt is fastened and unfastened and the vehicle reaches a certain speed.
Tire pressure warning light
| Warning Light | Details/Actions |
(flashes) |
When a buzzer sounds:
When a buzzer does not sound:
|
RCD OFF indicator (warning buzzer)
| Warning Light | Details/Actions |
(flashes or illuminates) (if equipped) |
|
PKSB OFF indicator (warning buzzer)
| Warning Light | Details/Actions |
|
(flashes) (if equipped) |
When a buzzer sounds:
When a buzzer does not sound:
|
PCS warning light (warning buzzer)
| Warning Light | Details/Actions |
|
(flashes) (if equipped) |
When a buzzer sounds:
When a buzzer does not sound:
|
PKSB OFF indicator (warning buzzer)
| Warning Light | Details/Actions |
|
(flashes) (if equipped)
|
When a buzzer sounds:
When a buzzer does not sound:
|
PCS warning light (warning buzzer)
| Warning Light | Details/Actions |
(flashes or illuminates) |
When a buzzer sounds simultaneously:
When a buzzer does not sound:
If the PCS (Pre-Collision System) or VSC (Vehicle Stability Control) system is disabled, the PCS warning light will illuminate. |
Slip Indicator
| Warning Light | Details/Actions |
|
Indicates a malfunction in:
|
Parking brake indicator
| Warning Light | Details/Actions |
(flashes) |
|
|
(U.S.A.) |
|
| (flashes) | |
(Canada) |
Brake hold operated indicator (warning buzzer)
| Warning Light | Details/Actions |
 (flashes) |
Indicates a malfunction in the brake hold system Have the vehicle inspected by your Lexus dealer immediately. |
Master warning light (warning buzzer)
| Warning Light | Details/Actions |
|
A buzzer sounds and the warning light comes on and flashes to indicate that the master warning system has detected a malfunction. |
Warning buzzer
In some cases, the buzzer may not be heard due to being in a noisy location or audio sound. Front passenger detection sensor, seat belt reminder and warning buzzer
- If luggage is placed on the front passenger seat, the front passenger detection sensor may cause the warning light to flash and the warning buzzer to sound even if a passenger is not sitting in the seat.
- If a cushion is placed on the seat, the sensor may not detect a passenger, and the warning light may not operate properly.
SRS warning light
This warning light system monitors the air-bag sensor assembly, front impact sensors, side impact sensors (front door), side impact sensors (front), side impact sensors (rear), driver’s seat position sensor, driver’s seat belt buckle switch, front passenger occupant classification system (ECU and sensors), “PASSENGER AIR BAG” indicator lights, front passenger’s seat belt buckle switch, seat belt pretensioners, airbags, interconnecting wiring and power sources
Electric power steering system warning light (warning buzzer)
When the battery charge becomes insufficient or the voltage temporarily drops, the electric power steering system warning light may come on and the warning buzzer may sound.
When the tire pressure warning light comes on
- Inspect the tires to check if a tire is punctured.
- If a tire is punctured:
- If none of the tires are punctured:
- Turn the engine switch off then turn it to IGNITION ON mode. Check if the tire pressure warning light comes on or blinks.
- If the tire pressure warning light blinks for approximately 1 minute then stays on There may be a malfunction in the tire pressure warning system. Have the vehicle inspected by your Lexus dealer immediately.
- If the tire pressure warning light comes on
- After the temperature of the tires has lowered sufficiently, check the inflation pressure of each tire and adjust them to the specified level.
- If the warning light does not turn off even after several minutes have elapsed, check that the inflation pressure of each tire is at the specified level and perform initialization.
The tire pressure warning light may come on due to natural causes
The tire pressure warning light may come on due to natural causes such as natural air leaks and tire inflation pressure changes caused by temperature. In this case, adjust-ing the tire inflation pressure will turn off the warning light (after a few minutes).
When a tire is replaced with a spare tire
The compact spare tire is not equipped with a tire pressure warning valve and transmit-ter. If a tire goes flat, the tire pressure warning light will not turn off even though the flat tire has been replaced with the spare tire. Replace the spare tire with the repaired tire and adjust the tire inflation pressure. The tire pressure warning light will go off after a few minutes.
Conditions that the tire pressure warning system may not function properly
WARNING
If both the ABS and the brake system warning lights remain on
Stop your vehicle in a safe place immediately and contact your Lexus dealer. The vehicle will become extremely unstable during braking, and the ABS system may fail, which could cause an accident resulting in death or serious injury.
When the electric power steering system warning light comes on
When the light comes on yellow, the assist to the power steering is restricted. When the light comes on red, the assist to the power steering is lost and handling operations of the steering wheel become extremely heavy. When steering wheel operations are heavier than usual, grip the steering wheel firmly and operate it using more force than usual.
If the tire pressure warning light comes on
Be sure to observe the following precautions. Failure to do so could cause a loss of vehicle control and result in death or serious injury.
- Stop your vehicle in a safe place as soon as possible. Check and adjust the tire inflation pressure immediately. If the tire pressure warning light comes on even after tire inflation pressure adjustment, it is probable that you have a flat tire. Check the tires. If a tire is flat, change it with the spare tire and have the flat tire repaired by the nearest Lexus dealer.
- Avoid abrupt maneuvering and braking.
If the vehicle tires deteriorate, you could lose control of the steering wheel or the brakes.
If a blowout or sudden air leakage should occur
The tire pressure warning system may not activate immediately.
Maintenance of the tires
Each tire, including the spare (if pro-vided), should be checked monthly when cold and inflated to the inflation pressure recommended by the vehicle manufacturer on the vehicle placard or tire inflation pressure label (tire and load information label). (If your vehicle has tires of a different size than the size indicated on the vehicle placard or tire inflation pressure label [tire and load information label], you should determine the proper tire inflation pressure for those tires.)
WARNING
As an added safety feature, your vehicle has been equipped with a tire pressure monitoring system (TPMS-tire pressure warning system) that illuminates a low tire pressure telltale (tire pressure warning light) when one or more of your tires is significantly under-inflated. Accordingly, when the low tire pressure telltale (tire pressure warning light) illuminates, you should stop and check your tires as soon as possible, and inflate them to the proper pressure. Driving on a significantly under-inflated tire causes the tire to overheat and can lead to tire failure. Under-inflation also reduces fuel efficiency and tire tread life, and may affect the vehicle’s handling and stopping ability. Please note that the TPMS (tire pressure warning system) is not a substitute for proper tire maintenance, and it is the driver’s responsibility to maintain correct tire pressure, even if under-inflation has not reached the level to trigger illumination of the TPMS low tire pressure telltale (tire pressure warning light). Your vehicle has also been equipped with a TPMS (tire pressure warning system) malfunction indicator to indicate when the system is not operating properly. The TPMS (tire pressure warning system) malfunction indicator is combined with the low tire pressure telltale (tire pressure warning light). When the system detects a malfunction, the telltale will flash for approximately one minute and then remain continuously illuminated. This sequence will continue upon subsequent vehicle start-ups as long as the malfunction exists. When the mal-function indicator is illuminated, the system may not be able to detect or signal low tire pressure as intended. TPMS (tire pressure warning system) malfunctions may occur for a variety of reasons, including the installation of replacement or alternate tires or wheels on the vehicle that prevent the TPMS (tire pressure warning system) from functioning properly. Always check the TPMS (tire pressure warning system) malfunction telltale after replacing one or more tires or wheels on your vehicle to ensure that the replacement or alternate tires and wheels allow the TPMS (tire pressure warning system) to continue to function properly.
NOTICE
To ensure the tire pressure warning system operates properly
Do not install tires with different specifications or makers, as the tire pressure warning system may not operate properly.
FAQs
- What should I do if the “Check Engine” warning light comes on?
A possible problem with the engine or emission system is indicated if the “Check Engine” warning light comes on. To identify and fix the issue, it is recommended that your car be inspected by a Maserati service center that has been granted authorization. - Why is the “Tire Pressure Low” warning message displayed?
When one or more tires have lower tire pressure than is advised, the “Tire Pressure Low” warning message will appear. Utilizing a tire pressure gauge, check the tire pressures and properly preheat the tires. - What does the “Brake System Malfunction” warning message mean?
The “Brake System Malfunction” warning message suggests that there might be a problem with the brake system of the car. Stopping the car in a secure area is essential before calling a certified Maserati service center for help. - Why does the “Battery Voltage Low” warning message appear?
The “Battery Voltage Low” warning message denotes a battery voltage that is below the acceptable operating range for the vehicle. Examine the connections to the battery, then have the battery tested. Replace or recharge the battery as necessary. - What should I do if the “Power Steering Malfunction” warning message is displayed?
The “Power Steering Malfunction” warning message alerts the driver to a potential power steering system problem. It is advised to pull over the car in a secure area and get in touch with a certified Maserati service facility for additional diagnosis and repair. - What does the “ABS Malfunction” warning message mean?
An issue with the anti-lock braking system is suggested by the “ABS Malfunction” warning message. It is advised to brake slowly and to get the car checked out as soon as possible by a Maserati service center that has been approved. - Why does the “Engine Overheating” warning message appear?
The warning message “Engine Overheating” denotes that the engine’s temperature has risen above the permissible operating range. Pull over to the side of the road in a secure manner, turn off the engine, and let it cool. Look for any obvious problems by checking the radiator and coolant level. Contact roadside assistance or a certified Maserati service facility if the issue continues. - What should I do if the “Transmission Malfunction” warning message is displayed?
A transmission system problem may be indicated by the “Transmission Malfunction” warning message. Park the car securely, then get help from a Maserati service center that is accredited. - Why does the “Airbag System Malfunction” warning message appear?
The “Airbag System Malfunction” warning message alerts the driver to a potential airbag system problem. To make sure the airbags are working properly, it is essential to have the car inspected by a Maserati service center that has been authorized. - What does the “Fuel Cap Open” warning message mean?
The fuel cap is not properly fastened or closed as indicated by the “Fuel Cap Open” warning message. To maintain proper fuel system functionality and prevent fuel evaporation, make sure the fuel cap is tightly fastened. - Why is the “Maintenance Required” warning message displayed?
The “Maintenance Required” warning message acts as a nudge that maintenance is overdue. Make arrangements for maintenance services at a Maserati service facility using the vehicle’s maintenance schedule. - What should I do if the “Blind Spot Monitor Malfunction” warning message appears?
The “Blind Spot Monitor Malfunction” warning message suggests that the blind spot monitoring system may be malfunctioning. For diagnosis and repair, it is best to get in touch with a Maserati service center that has been approved. - Why does the “Key Battery Low” warning message appear?
The “Key Battery Low” warning message denotes that the key fob’s or keyless entry system’s battery needs to be replaced. Follow the manufacturer’s instructions when changing the key fob’s battery. - What does the “Pre-Collision System Malfunction” warning message mean?
The “Pre-Collision System Malfunction” warning message alerts the driver to a potential pre-collision system malfunction. An authorized Maserati service center should inspect the car to identify and fix the issue. - Why is the “Lane Departure Alert Malfunction” warning message displayed?
The warning message “Lane Departure Alert Malfunction” suggests that there may be a problem with the lane departure alert system. To ensure proper operation, it is advised to have the car inspected by a Maserati service center.
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