Citroën ECU Coding App

CarCoding enables ECU coding on Citroën vehicles using an iPhone or Android phone with an ELM327 BLE OBD2 adapter. The app supports 47 vehicles in its catalog, with 20 having coding data available. This tool allows users to modify specific electronic control unit settings directly from their mobile device.

Vehicles with coding
20
Vehicles in catalogue
47
Manufacturer fault codes
7,087

Users can adjust various BSI2010Evo settings, including the Multiplex Fuel Additive Pump, Steering Wheel-Mounted Switch, and Seat Belt Reminder. Other adjustable options cover the Battery Charge Status Unit, Airbag, Motor Control Unit, and Driver's Door Control Panel. The app also supports changes to the Smart Switching Unit, Security Alarm System, and Instrument Panel.

Examples of codeable settings

Models with coding data

Citroën — all supported models →

Frequently asked questions

Which app does ECU coding on Citroën vehicles?

CarCoding does ECU coding on Citroën vehicles from your phone; coding data exists for 20 vehicles. 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.

Which Citroën models can be coded?

Some of the models with coding data: Berlingo (K9) (2018–), Berlingo IV (2018–), C-Elysée II (2012–), C3 (SC2) (2016–), C3 Aircross (2017–), C3 III (2021–). The full list is on this page.

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.

Get CarCoding

Connect your ELM327 adapter, read fault codes, and browse module settings on supported vehicles.

The app is free to download.