Hyundai Sonata Hybrid Warning Lights: What They Mean

Amber: check soon

Forward Safety warning light

Yellow: Forward Safety is deselected, disabled or malfunctioning. Red blinking: the Forward Safety function is operating.
What to do: If yellow stays on after the sensor is uncovered or unblocked, have a dealer inspect the vehicle. PDF page 137

Lane Safety indicator light

Yellow: Lane Safety is disabled or a malfunction is detected. Green: Lane Keeping Assist conditions met, blinks when operating. Gray: conditions not met.
What to do: If yellow stays on after the sensor is unblocked, have a dealer inspect the vehicle. PDF page 137

AUTO HOLD indicator light

White: Auto Hold activated. Green: vehicle held stopped by Auto Hold. Yellow: Auto Hold malfunction detected.
What to do: If it stays yellow while driving, have a dealer inspect the vehicle. PDF page 137

Intelligent Speed Limit Assist indicator light

Yellow: the system is disabled, the front view camera is blocked, or a malfunction is detected.
What to do: If it stays on after the camera is unblocked, have a dealer inspect the vehicle. PDF page 138

Inattentive Driving Warning light

Yellow: Driver Attention Warning is disabled or malfunctioning; blinking yellow recommends taking a break.
What to do: If it stays on after the camera is unblocked, have a dealer inspect the vehicle. PDF page 138

Other warnings and indicators

Engine oil pressure warning light

Engine oil pressure is low. Engine power may be limited by the enhanced engine protection system. Continued driving can cause engine failure.
What to do: Stop safely, turn engine off, check oil and add if low. If light stays on, have it inspected by a dealer. PDF page 134

Electronic Brake Force Distribution (EBD) System warning light

ABS and Parking Brake warning lights on together while driving means the ABS and brake system are not working normally.
What to do: Avoid high speed and abrupt braking; have the vehicle inspected by a dealer as soon as possible. PDF page 133

Anti-lock Brake System (ABS) warning light

Comes on for about 3 seconds at start-up; otherwise indicates an ABS malfunction. Hydraulic brakes still work.
What to do: If it stays on while driving, have the vehicle inspected by a dealer. PDF page 133

Motor Driven Power Steering (MDPS) warning light

Comes on for about 3 seconds at start-up; otherwise indicates a power steering malfunction.
What to do: If it stays on while driving, have the vehicle inspected by a dealer. PDF page 133

Malfunction Indicator Lamp (MIL)

Malfunction in the emission control system, engine, powertrain or active air flap; also may show after repeated engine power limiting from low oil.
What to do: If it stays on while driving, have the vehicle inspected by a dealer. PDF page 134

Low Tire Pressure Telltale / TPMS Malfunction Indicator

One or more tires significantly under-inflated; if it flashes about a minute then stays on, the TPMS has a malfunction.
What to do: Stop and check tires soon and inflate properly. If the malfunction indicator stays on after blinking, have a dealer inspect. PDF page 449

Electronic Stability Control (ESC) indicator light

Comes on for about 3 seconds at start-up; stays on for an ESC malfunction; blinks while ESC is operating.
What to do: For a malfunction, have the vehicle inspected by a dealer as soon as possible. PDF page 139

LED headlight warning light

Malfunction with an LED headlight (steady) or a related part (blinking). Driving this way may shorten LED headlight life.
What to do: If it stays on or blinks, have the vehicle inspected by a dealer (as soon as possible if blinking). PDF page 139

Master warning light

A malfunction in a listed system, such as collision-avoidance assists, lights, cruise control, doors/trunk, low washer fluid or TPMS.
What to do: Turns off when the issue is resolved. PDF page 138

Low fuel level warning light

The fuel tank is nearly empty. Driving on empty may cause misfire and damage the catalytic converter.
What to do: Refuel the vehicle as soon as possible. PDF page 134

Door open indicator light

A door is left open or not fully closed. The battery may discharge if left on.
What to do: Confirm all doors are fully closed and the light is off before driving. PDF page 141

Immobilizer indicator light

Shows smart key detection status; blinking indicates the key is not in the vehicle or an immobilizer malfunction.
What to do: If the key is inside but not detected, or it blinks for a malfunction, have a dealer inspect. PDF page 140

Turn signal indicator light

Blinks when the turn signal lever is used. Staying on without blinking, rapid blinking, or not lighting may mean a malfunction.
What to do: For these signs, have the vehicle inspected by a dealer. PDF page 140

Electronic Stability Control (ESC) OFF indicator light

Comes on for about 3 seconds at start-up and when you deactivate ESC with the ESC OFF button. PDF page 139

Green: system on

Lane Following Assist indicator light

Green: Lane Following Assist operating. Gray: conditions not met. Blinking white: steering wheel assist canceled. PDF page 141

High Beam Assist indicator light

White: High Beam Assist ready. Green: operating, switching between high and low beam automatically for other vehicles. PDF page 141

Low beam indicator light

The headlights are on. PDF page 141

Light ON indicator light

The parking lights or headlights are on. PDF page 140

Blue: system on

High beam indicator light

High beams are on, or the turn signal lever is in the Flash-to-Pass position. PDF page 141

Summarized in our own words from the 2026 Hyundai Sonata 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.