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How to reset the ECU on the Ford Focus?

Model: Ford Focus MK 2, Focus 2 - Years 2004-2011
Part: Warning light – error code

To reset the ECU on the Ford Focus, open the bonnet to access the engine compartment: on the right side, you will find the battery. The two terminals will be connected: disconnect the negative terminal by removing the cable with the red end. Once this cable is removed, wait a few minutes for the reset to complete; then reconnect the negative terminal to verify that the reset has been successful.

Updated on 1 August 2026 by ScegliAuto

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