- Model years
- 2018–
- Engine options
- 5
- Coding modules
- 4
- Codeable settings
- 294
- Make-wide fault codes
- 2,083
CarCoding allows users to read fault codes and modify ECU settings on the Ford Focus (MK4) from 2018 onwards using an ELM327 BLE OBD2 adapter. The application supports 4 coding modules and provides access to 294 codable settings for this vehicle.
Users can adjust specific configurations such as Extended Play Time, Clock Master, and CAN Steering Wheel Control Switches. The app also includes descriptions for 2083 manufacturer fault codes to assist with diagnostics.
Supported coding modules
The CarCoding coding database defines 4 modules and 294 settings for this platform. Open a module to see every setting it carries.
Grouped by category. Open a module to see every setting it exposes.
Body and comfort
Instrument cluster
Infotainment
Engine options
- 1.0 EcoBoost 125HP
- 1.5 EcoBoost 150HP
- ST 2.3 EcoBoost 280HP
- 1.5 EcoBlue 120HP
- 2.0 EcoBlue 150HP
Fault codes for this make
There are 2,083 manufacturer fault code descriptions for Ford · Mercury · Lincoln. Open a code block and read what your code means.
Frequently asked questions
Which app can do ECU coding on the Ford Focus (MK4)?
CarCoding does ECU coding on the Ford Focus (MK4) (2018–) from your phone: 294 codeable settings are defined across 4 modules; example settings: Extended Play Time, Clock Master, CAN Steering Wheel Control Switches, Auxiliary Input, Climate Control, Chime Strategy. 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 Ford Focus (MK4)?
Yes. Besides standard OBD2 engine codes there are 2,083 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.