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How to Reset the ECU of the Citroen C4

Model: Citroen C4 MK 2 - Years 2010-2018
Part: Warning light – error code

This short guide will show you some important instructions necessary to perform a general reset of the engine ECU of the Citroen C4, as well as most vehicles. First, open the car's bonnet and start disconnecting both battery terminals (positive and negative) using a socket or spanner; then wait about ten minutes before reconnecting both terminals. This way, you will have disconnected the ECU from the main power supply, effectively performing a true reset of the ECU!

Updated on 14 August 2026 by ScegliAuto

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