- Model years
- 2012–2020
- Engine options
- 6
- Coding modules
- 4
- Make-wide fault codes
- 14,282
CarCoding enables ECU coding and fault code reading for the Audi A3 (8V) using an ELM327 BLE OBD2 adapter. This tool supports vehicles from 2012 to 2020, including engine options such as the 30 TFSI, 35 TFSI, 40 TFSI, RS3, 30 TDI, and 35 TDI. The application accesses four coding modules and utilizes a list of 14282 manufacturer fault code definitions.
The app allows users to modify specific vehicle settings, including Footwell lights installed, Turn On Light Warning, and Key Fob While Engine Running. Additional adjustable options include Lock Autolock Rear, Lock Auto Unlock, Lock Autolock At Speed, Lock Lock Menu, Lock Unlock Menu, Lock Unlock Doors Variants, and Raise And Lower Windows With Key Fob. The available settings are resolved at runtime from the unit's part number using ODX data.
Supported coding modules
On Volkswagen Group cars the setting list is resolved from the car: CarCoding reads the unit's part number and fetches the matching ODX bit map at runtime. The list you see is the one your unit actually carries.
Body and comfort
- CENTRAL ELECTRONICS 0947 settingsComfort, Display, Lighting
- DOOR DRIVER 426 settingsComfort, Lighting, Safety
- DOOR PASSENGER 522 settingsComfort, Lighting
Instrument cluster
Engine options
- 30 TFSI 1.0 Petrol 116HP
- 35 TFSI 1.4 Petrol 150HP
- 40 TFSI 2.0 Petrol 190HP
- RS3 2.5 Petrol 400HP
- 30 TDI 1.6 Diesel 110HP
- 35 TDI 2.0 Diesel 150HP
Fault codes for this make
There are 14,282 manufacturer fault code descriptions for Audi · Porsche · Bentley · Lamborghini. Open a code block and read what your code means.
Frequently asked questions
Which app can do ECU coding on the Audi A3 (8V)?
CarCoding does ECU coding on the Audi A3 (8V) (2012–2020) from your phone: the setting list is resolved at runtime from your unit's part number; example settings: Footwell lights installed, Turn On Light Warning, Key Fob While Engine Running, Lock Autolock Rear, Lock Auto Unlock, Lock Autolock At Speed. An ELM327-based OBD2 adapter with Bluetooth Low Energy (BLE) is all you need; the app runs on iPhone and Android and is free to download.
Can I read fault codes on the Audi A3 (8V)?
Yes. Besides standard OBD2 engine codes there are 14,282 manufacturer fault code descriptions for this make group; you can read and clear them.
Which adapter do I need?
An ELM327-based OBD2 adapter with Bluetooth Low Energy (BLE) is all you need; the app runs on iPhone and Android and is free to download.
How do I start?
- Plug an ELM327-compatible OBD2 adapter into the car.
- Open CarCoding and connect to the adapter over Bluetooth.
- Pick the make and model — or let the VIN identify it.
- Read fault codes; on supported vehicles, open the module settings.
Related pages
Get CarCoding
Connect your ELM327 adapter, read fault codes, and browse module settings on supported vehicles.
The app is free to download.