Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions

Where is the EOBD Port on the Citroen C4?

Model: Citroen C4 MK 3 - Years 2020-2026
Part: Checks and maintenance

Every vehicle has a diagnostic port (European On-Board Diagnostics) that connects to the main control unit to read any errors that have been logged as they occur. This port is used by workshop technicians to diagnose various issues, and by DIY enthusiasts, who can use a suitable reader to see what problems our beloved vehicle has. Typically, vehicles have this socket on the left side of the steering wheel, at the bottom, and it is clearly visible. However, Citroen has hidden the C4's socket behind a panel in the centre console. Under the air conditioning buttons, insert a flathead screwdriver and pry it open. A small compartment will open, revealing the socket, in bright green, right there in front.

Updated on 22 August 2026 by ScegliAuto

Video tutorial

Related tutorials

Where is the EOBD port located on the Citroen C4 Cactus?
Where is the EOBD port located on the Citroen C4 Cactus?
Citroen C4 (2014-2020 / Cactus) In this video, we see where the EOBD port of the Citroen C4 Cactus is located. The EOBD port (European On Board Diagnostic) originates from the bette…
Where is the OBD port located in the Citroen C4?
Where is the OBD port located in the Citroen C4?
Citroen C4 (2010-2018 / MK 2) If you don't know where the OBD port of your second series Citroen C4 is located, don't worry because in the following guide you will find the descri…
Where is the OBD port located on the 2011 Citroen C4?
Where is the OBD port located on the 2011 Citroen C4?
Citroen C4 (2010-2018 / MK 2) If you have a 2011 Citroen C4 and want to find out where the OBD port is located, just pay attention to the following steps and apply them in the ord…

Other guides you may be interested in

    Frequently Asked Questions

    • C4 2010-2018 - Why isn't the touch screen of the Citroen C4 working? Read answer

How to Open the Bonnet on the Lancia Y

To open the bonnet on this vehicle, follow these simple instructions: first, open the driver's door and locate the lever positioned just below the dashboard, marked with an image of the vehicle with the bonnet open. Pull this lever towards you until you hear a "click" indicating the bonnet is released. Next, exit the cabin and stand in front of the bonnet to disengage the safety catch and complete the opening. To do this, slightly lift the bonnet, locate the yellow lever underneath, and pull it to the left to fully release and open the bonnet.

Watch the video!


by ScegliAuto

More videos