Audi A4 / A5 (B9)

Model years

2015–

Engine options

7

Coding modules

22

Make-wide fault codes

14,282

CarCoding supports the Audi A4 and A5 B9 models from 2015 onwards, including various petrol and diesel engines. The app connects via an ELM327 BLE OBD2 adapter to access 22 coding modules. It allows users to read fault codes and modify specific vehicle settings directly from their iPhone or Android device.

Users can adjust settings such as the free space in fuel tank display, pointer test, and lap timer in cluster. Other options include oil temperature display, acceleration display, and outside temperature display. The app also supports features like warning at 120 km/h and engine data display, with the list resolved at runtime from the unit's part number.

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 0997 settingsComfort, Display, Lighting, Safety, climate, multimedia
• DOOR DRIVER 4222 settingsComfort, multimedia
• CLIMATE 086 settingsComfort
• DOOR PASSENGER 524 settingsComfort
• CENTRAL CONV 463 settingsComfort
• STEERING COLUMN 163 settingsComfort
• SEAT MEMORY 362 settingsComfort
• DOOR REAR RIGHT BC1 settingComfort
• PARKING HEATER 181 settingclimate
• SEAT MEMORY PASS 061 settingComfort

Instrument cluster

• INSTRUMENTS 17102 settingsComfort, Display, Safety, climate, configuration
• HEAD UP DISPLAY 828 settingsComfort, multimedia

Infotainment

• INFOTAINMENT 5F22 settingsComfort, Display, multimedia

Safety and driver assistance

• ADAS ACC 1315 settingsComfort, multimedia
• DRIVER ASSIST A56 settingsComfort
• BRAKES 034 settingsComfort
• CAMERA 6C4 settingsComfort
• BLIND SPOT 3C1 settingComfort

Powertrain

• DRIVE SELECT 443 settingsComfort
• ENGINE 013 settingsComfort
• TRANSMISSION 022 settingsComfort

Gateway

• GATEWAY 198 settingsComfort

Engine options

• 35 TFSI 1.4 Petrol 150HP
• 40 TFSI 2.0 Petrol 190HP
• 45 TFSI 2.0 Petrol 252HP
• RS5 2.9 Petrol 450HP
• 35 TDI 2.0 Diesel 150HP
• 40 TDI 2.0 Diesel 190HP
• 50 TDI 3.0 Diesel 286HP

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.

• C1887
• C0797
• P3629
• U0547
• B2297
• B10245
• U11233
• B14217
• U10208
• U12205
• P06203
• B15200

77 more blocks →

Frequently asked questions

Which app can do ECU coding on the Audi A4 / A5 (B9)?

CarCoding does ECU coding on the Audi A4 / A5 (B9) (2015–) from your phone: the setting list is resolved at runtime from your unit's part number; example settings: Free Space In Fuel Tank Display, Pointer Test, Lap timer in cluster, Oil temperature display, Acceleration Display, Outside Temperature Display. 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 A4 / A5 (B9)?

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?

1. Plug an ELM327-compatible OBD2 adapter into the car.
2. Open CarCoding and connect to the adapter over Bluetooth.
3. Pick the make and model — or let the VIN identify it.
4. Read fault codes; on supported vehicles, open the module settings.

Related pages

• Audi — Supported Vehicles
• All ECU modules
• All fault codes