A known working OBD2 reader for the Citroen C3 when you have an engine management light on.
Use this OBD2 reader for a quick and cheap route to reading engine fault codes for all petrol models and most diesel models from 2004 that a dealer would charge you way too much money for the same information.
If you have a pre2004 diesel C3 or need to read non-engine faults (ABS etc), use Lexia tool instead
Take your pick from Amazon or eBay for quick delivery of a code reader to your door.
AL319 is a well received c3 OBD reader and available on Amazon or eBay.
The C3 diagnostic port is often found in the glove box, behind a plastic removable door.
2002 OBD port is in the glovebox, behind removable cover
2006 is above the first fuse box in the glove box.