Citroen Grand C4 Picasso Ecu Location

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Lift the bonnet and look to the right of the battery and you will see a relay box

Citroen c4 grand picasso.jpg

Remove the lid and you will see the ecu located at the front of the relay box

  • for models 2009 onwards, it will have a security plate over the edge connector. You will need to remove the security bolts to gain access to the ECU.