Lexus RXの警告灯：まず確認したい15のサイン
2026 Lexus RX 350h、RX 450h+、RX 500hで注意したい15の警告灯を、公式英語版オーナーリソースを確認用ソースとして整理しました。
Lexus RXのメーターに赤いブレーキ警告、黄色いエンジンアイコン、タイヤ空気圧の表示が出たら、まず色と車の挙動を分けて判断します。このガイドは2026 RX 350h、RX 450h+、RX 500hで注意したい15項目を整理したものです。
Model year, trim, equipment, software, and hybrid or plug-in hybrid configuration can change the exact dashboard message. Always check the official owner resources for the exact vehicle and year before deciding whether to continue driving.
Compare the dashboard symbol with official owner resources
A direct local-language warning-light page was not verified, so the official English Lexus owner resources are used as the source fallback.
公式英語版Lexusオーナーリソースを開く
Quick color check
- Red warnings usually require stopping safely and checking the manual.
- Amber warnings may allow limited driving, but the cause should be checked soon.
- Green and blue lights are often operating indicators.
- Hybrid and plug-in hybrid models may show EV/HV, regenerative braking, traction-battery, or overheating messages.
15 Lexus RX warning lights to check first
A light that appears briefly at start-up can be part of the normal system check. A light that stays on, flashes, sounds a buzzer, or appears with reduced power, changed braking feel, heavy steering, or repeated messages deserves a more conservative response.
| Priority | Light | Meaning | What to do |
|---|---|---|---|
| Stop safely |  Brake system red | Possible low brake fluid or brake-system malfunction | Stop safely and do not continue until checked. |
| Check soon |  Brake system amber | Regenerative braking, electronic brake control, or parking brake issue | Reduce driving and arrange service if braking feel changes. |
| Overheat |  High coolant temperature | Engine coolant temperature is too high | Stop and let the vehicle cool before following the manual. |
| Hybrid |  Hybrid system overheat | Hybrid drive components may be too hot | Stop hard driving and let the system cool safely. |
| Electrical |  Charging system | Charging-system or 12V electrical issue | Reduce electrical load and seek service advice. |
| Engine |  Engine oil pressure | Oil pressure may be too low | Stop immediately to avoid engine damage. |
| Diagnosis |  Malfunction indicator | Engine control, electronic throttle, or hybrid-system issue | Get diagnosis promptly if power is reduced. |
| Safety |  SRS warning | Airbag or seatbelt pretensioner issue | Do not ignore occupant protection warnings. |
| Braking |  ABS warning | ABS or brake-assist issue | Treat with extra caution if brake warnings also appear. |
| Pedal |  Pedal misapplication | Brake override or drive-start control warning | Release the accelerator and follow the display message. |
| Steering |  EPS warning | Power steering assist may be reduced or lost | Slow down and stop safely if steering feels heavy. |
| Tires |  Tire pressure | Low pressure, puncture, or TPMS issue | Check all four tires and pressure. |
| Forward safety |  PCS warning | Pre-collision system fault or sensor limitation | Check camera and radar areas. |
| Lane assist |  LTA/LDA | Lane assist may be unavailable or limited | Steer manually and do not rely on assist. |
| Stability |  Slip indicator | VSC, TRAC, or hill-start assist status or fault | Flashing can mean operation; steady light needs attention. |
The symbol chips are cropped from the official 2026 Korean RX owner manual overview page and displayed on a dark contrast background. Localized pages use official English Lexus owner resources for external source links.
1. Red warnings require caution
Brake, coolant, charging, oil-pressure, SRS, and red EPS warnings can affect safety or vehicle damage. Stop in a safe place and confirm the official manual before driving on.
2. The engine light can involve hybrid control
The malfunction indicator may relate to engine control, electronic throttle control, or the hybrid system. If reduced power or vibration appears, arrange diagnosis.
3. Check tire pressure before highway use
A TPMS light can come from temperature changes, but repeated warnings may mean a puncture or sensor fault. Check all four tires.
4. Driver-assistance lights depend on conditions
PCS and LTA can be limited by camera or radar blockage. A steady slip indicator should be treated as a stability-control check signal.
5. RX 450h+ has plug-in hybrid indicators
EV mode, AUTO EV/HV mode, HV mode, and traction-battery charging indicators should be read together with the dashboard message and official English owner resources.
Official source and related guides
Use the official owner resources to change the model year and confirm the exact RX manual. A 2025, 2026, or 2027 vehicle can have different warnings, messages, and feature availability.
In short, treat red warnings as stop-and-check signals, amber warnings as cause-check signals, and hybrid or plug-in hybrid messages as system-specific information that should be matched to the official owner resources.