Bulb Failure Warning
The bulb failure warning tells the driver that an exterior lamp is not working.
What is Bulb Failure Warning?
The control module monitors current to each lamp. LED lamps may need specific monitoring. Wrong bulbs can trigger false warnings. Some cars switch to a backup lamp, for example using the fog light when a brake light fails. A warning can also come from a broken lamp holder or corroded contact.
How it works
Missing or abnormal current is detected as a failure.
Why it matters for your car
Check the indicated lamp and its fuse and connector. Retrofit LEDs may trigger warnings.
Other terms
- ACEA Oil Specification
- Acoustic Glass (Laminated Side Windows)
- Air-fuel Ratio
- Car Restoration
- Cargo Barrier (Dog Guard)
- Clear Coat Failure (Lacquer Peel)
- Cruise Control
- Diesel Intake Throttle Valve
- Diesel Waxing (Fuel Gelling)
- Engine Swap
- Oxygen Sensor Heater
- Parasitic Drain
- Part Number
- Piston Ring
- Soft-close Doors
- Solar Charging
- Terrain Modes (Drive Mode Selector)
- Test Light
- Thread Locker
- Total Cost Of Ownership (TCO)