Warning lights of the Audi A7 C8: what each light means
In the Audi A7 C8, the documented faults light up 3 warning lights on the dashboard. The most frequent: airbag light (2 faults), overheating (1 fault) and engine warning light (1 fault). Overheating calls for stopping as soon as possible.
Which warning lights the faults of the Audi A7 C8 trigger
Red ones first, and those that call for stopping. Below each warning light, the documented faults that trigger it, with their pages.
Overheating or temperature warning light
Urgency: As soon as possibleRedSymbol: thermometer over wavy lines (coolant)
The temperature needle climbs towards the red zone or the coolant warning light comes on. It usually points to a lack of coolant, a leak, or a failing thermostat or water pump. Driving on can warp the cylinder head or damage the gasket.
What to do: Stop as soon as you can and switch the engine off. Do not open the coolant reservoir cap while it is hot. If coolant is missing, do not set off again until you have found the leak.
1 documented fault that triggers it in the Audi A7 C8
- High severity: Failing water pump and cooling system leaks · 3.0 TDI V6 engine
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.
2 documented faults that trigger it in the Audi A7 C8
- High severity: Faulty instrument panel that may obstruct the passenger airbag · outside the engine
- High severity: Airbag impact sensors incorrectly fitted in the front doors · outside the engine
Engine fault warning light (check engine)
Urgency: Garage soonYellow or amberSymbol: outline of an engine seen from the side, in yellow or orange
The orange engine-shaped warning light comes on when the ECU detects a fault affecting combustion or emissions. If it flashes, it usually points to misfires that can damage the catalytic converter.
What to do: If it stays on steadily, you can drive gently to a garage and ask for a fault code read-out. If it flashes or you notice a loss of power, slow down and get to a garage as soon as possible.
1 documented fault that triggers it in the Audi A7 C8
- High severity: Injector wear (needle seat) and injection faults · 3.0 TDI V6 engine
Frequently asked questions
Which warning lights come on most in the Audi A7 C8?
Airbag light: 2 documented faults, such as faulty instrument panel that may obstruct the passenger airbag. Overheating: 1 documented fault, such as failing water pump and cooling system leaks. Engine warning light: 1 documented fault, such as injector wear (needle seat) and injection faults.
Which warning light of the Audi A7 C8 is the most serious?
Overheating: its urgency is “as soon as possible”. Stop as soon as you can and switch the engine off. Do not open the coolant reservoir cap while it is hot. If coolant is missing, do not set off again until you have found the leak.
A warning light has come on in the Audi A7 C8: what should I do?
Find which warning light it is on this page and check its urgency. With overheating, stop as soon as possible somewhere safe. 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.