Warning lights of the Audi Q4 e-tron: what each light means
In the Audi Q4 e-tron, the documented faults light up 3 warning lights on the dashboard. The most frequent: airbag light (1 fault), ABS/ESP light (1 fault) and ESP light (1 fault).
Which warning lights the faults of the Audi Q4 e-tron trigger
Red ones first, and those that call for stopping. Below each warning light, the documented faults that trigger it, with their pages.
Airbag warning light on
Urgency: Garage soonRedSymbol: a seated person wearing a seat belt with a circle (the inflated airbag) in front; in some cars, the letters SRS or AIRBAG
The airbag warning light means the system has detected a fault and an airbag or seatbelt pretensioner may not deploy in a crash. Causes range from a connector under the seat to the control unit or the airbag itself.
What to do: Have it diagnosed as soon as possible and check with the VIN whether the car has any outstanding airbag recall.
1 documented fault that triggers it in the Audi Q4 e-tron
- High severity: Campaign 68J1: faulty airbag control unit · outside the engine
ABS or ESP warning light on
Urgency: Garage soonYellow or amberSymbol: the letters ABS, usually inside a circle, in amber or orange
It indicates a fault in the anti-lock braking or stability control system: often a dirty or damaged wheel speed sensor, its wiring or the hydraulic unit. The brakes still work, but without those aids.
What to do: Drive carefully, especially in the rain, and ask for a fault code read-out. It is often fixed with a wheel sensor.
1 documented fault that triggers it in the Audi Q4 e-tron
- High severity: Campaign 45BF: stability control module missing pump motor screws · outside the engine
ESP warning light on or flashing
Urgency: Garage soonYellow or amberSymbol: the silhouette of a car with curved skid marks (swerving lines) beneath it, or the letters ESP, in amber or orange
The ESP light belongs to the electronic stability control, the system that brakes wheels individually and reduces power when the car starts to skid. It flashes while the system is intervening; if it stays on steadily, it usually indicates a fault (often a sensor) or that ESP has been switched off with its button.
What to do: If it flashes in a bend or on a wet road, ease off: ESP is working. If it stays on, switch off and restart, check the ESP OFF button has not been pressed and, if it persists, ask a garage for a fault code read-out.
1 documented fault that triggers it in the Audi Q4 e-tron
- High severity: Campaign 45BF: stability control module missing pump motor screws · outside the engine
Frequently asked questions
Which warning lights come on most in the Audi Q4 e-tron?
Airbag light: 1 documented fault, such as campaign 68J1: faulty airbag control unit. ABS/ESP light: 1 documented fault, such as campaign 45BF: stability control module missing pump motor screws. ESP light: 1 documented fault, such as campaign 45BF: stability control module missing pump motor screws.
Which warning light of the Audi Q4 e-tron is the most serious?
None of the warning lights with documented faults in the Audi Q4 e-tron requires an immediate stop. The most serious fault that triggers one of them is campaign 68J1: faulty airbag control unit (airbag light), of high severity severity.
A warning light has come on in the Audi Q4 e-tron: what should I do?
Find which warning light it is on this page and check its urgency. For the others, book an appointment at a garage and have them read the fault code with an OBD reader: it shows which system has failed.