Acura RLX Sport Hybrid Warning Lights: What They Mean

Red: stop or act now

Brake System Indicator (Red)

Brake fluid is low or there is a problem with the brake system.
What to do: Press the pedal lightly to check it; if abnormal act immediately. If it comes on with the ABS or amber brake light, stop and call a dealer. PDF page 570

Low Oil Pressure Indicator

Engine oil pressure is low.
What to do: Stop immediately in a safe place, shut off the power system, check oil level after about three minutes, and call a dealer if the light stays on. PDF page 569

Other warnings and indicators

Malfunction Indicator Lamp

Emissions control system problem when on; engine misfire detected when blinking.
What to do: If on, avoid high speeds and have it inspected. If blinking, park safely away from flammables and let the engine cool 10 minutes. PDF page 570

12-Volt Battery Charging System Indicator

The 12-volt battery is not being charged.
What to do: Turn off climate control, rear defogger and other electrical loads, and contact a dealer immediately. Do not switch off the power system if stopping briefly. PDF page 569

Electric Power Steering (EPS) System Indicator

There is a problem with the electric power steering system.
What to do: Stop safely and restart the power system. If the light stays on, have a dealer inspect the vehicle immediately. PDF page 571

Electric Parking Brake System Indicator

There is a problem with the electric parking brake system.
What to do: Avoid using the parking brake and have the vehicle inspected by a dealer immediately. PDF page 571

Low Tire Pressure/TPMS Indicator

A tire is significantly underinflated, or the TPMS has a fault or the compact spare is fitted (blinks, then stays on).
What to do: Drive carefully, stop safely, and set tire pressure to the specified level. If it blinks then stays on, have the tire inspected. PDF page 572

Electric Parking Brake Indicator

Parking brake is applied; blinking with the system indicator signals a parking brake problem.
What to do: Press the brake pedal to release it if the switch is pressed without braking. If it blinks, call a dealer. PDF page 79

Summarized in our own words from the 2020 Acura RLX Sport Hybrid owner's manual (AI-assisted; every light name was matched against its cited page 2026-10-18). Your vehicle may not have every light, and other years can differ. A red warning that stays on usually means stop safely and check: your manual has the final word.