B0490

Display Backlight Circuit

Moderate severity

The infotainment or instrument cluster module has detected a fault in the display backlight circuit. The display may stay dark or be unreadable in low light.

Common causes

Backlight LEDs or inverter failed
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $170-1320
Display module internal fault
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $170-1320
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First things to check

1Confirm the code with a scan tool and check for additional related codes.
2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.

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Related codes

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Frequently asked questions

What does B0490 mean?

B0490 means "Display Backlight Circuit". It is a generic OBD-II code that points to a fault in the body.

What are the most common causes of B0490?

backlight leds or inverter failed; display module internal fault — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.

Can I keep driving with this code?

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.

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