Citroen C4 DS4 OBD diagnostic port location 2011 - 2020

OBD port location on a Citroen C4 and DS4 from 2011 to 2020. OBD stand for "on board diagnostic" and it have different names, OBD, OBD2, EOBD, EOBD2, it is a computer system inside of a vehicle that tracks and regulates a car’s performance. This on-board computer system collects information from the network of sensors inside the vehicle, which the system can then use to regulate car systems or alert the user to problems. A technician can then simply plug into the OBD system to collect vehicle data and diagnose the problem. OBD systems have been a great help in helping users better understand vehicle diagnostics. The history of OBD begins in the 1980s. During this time, vehicle monitoring systems were developed in response to several factors, including: - Emissions control: One of the biggest reasons for developing OBD was to help reduce vehicle emissions. OBD systems help in this area by monitoring the performance of major engine components for any system failures that could result in increased emissions. OBD is so helpful in this area that it is incorporated into EPA literature on the implementation of the Clean Air Act. - Electronic fuel injection: In the 1980s, automakers began the widespread production of vehicles with electronic fuel injection. Unlike mechanical fuel injection systems, electronic fuel injection works via computer control, with the computer system monitoring and determining the fuel flow into the engine. - Electronic components: As electronic fuel...