Acura RLX Warning Lights: What They Mean

Red: stop or act now

Brake System Indicator (Red)

Brake fluid is low or the brake system has a problem.
What to do: Press the brake pedal lightly to check pressure; if abnormal, act immediately and downshift if needed. Have the vehicle repaired right away. PDF page 516

Low Oil Pressure Indicator

Engine oil pressure is low.
What to do: Park safely at once, stop the engine, wait about three minutes, check oil level, restart. If the light stays on over 10 seconds, call a dealer. PDF page 515

Charging System Indicator

The battery is not being charged.
What to do: Turn off climate control, rear defogger and other electrical loads, and contact a dealer immediately. Avoid turning off the engine if stopping briefly. PDF page 515

Amber: check soon

Malfunction Indicator Lamp

Emissions control system problem when on; engine misfire detected when blinking.
What to do: If on, avoid high speeds and see a dealer. If blinking, park safely away from flammables and let the engine cool at least 10 minutes. PDF page 516

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 517

Other warnings and indicators

Electric Power Steering (EPS) System Indicator

There is a problem with the EPS system; steering may become harder to operate.
What to do: Stop safely and restart the engine. If the light stays on, have a dealer inspect the vehicle immediately. PDF page 517

Low Tire Pressure/TPMS Indicator

A tire pressure is significantly low. Blinking then staying on means a TPMS problem or compact spare installed.
What to do: Drive carefully, stop safely, and set tire pressure to spec. If it blinks then stays on, have a dealer inspect the tire. PDF page 518

Transmission System Indicator

Blinking with a warning message means the transmission is malfunctioning.
What to do: Have a dealer inspect the vehicle immediately; shift to N after starting the engine and set the parking brake when parking. PDF page 518

Electric Parking Brake Indicator

Parking brake is applied; blinking together with the system indicator means a parking brake problem.
What to do: If you pressed the switch without braking, depress the brake pedal to release. For a problem, release the brake and call a dealer. PDF page 73

Summarized in our own words from the 2020 Acura RLX 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.