Citroën C4 Cactus MD1CS003 AdBlue SCR Removal Emulator
A plug-and-play CAN-bus emulator that permanently resolves all AdBlue SCR fault codes and safe-mode restrictions on the Citroën C4 Cactus MD1CS003 ECU, with no wire cutting or software changes required.
The Citroën C4 Cactus pairs urban agility with a fuel-efficient diesel engine managed by the MD1CS003 ECU, which continuously oversees AdBlue (DEF) dosing and SCR NOx conversion. As kilometres build, NOx sensor drift, a blocked urea dosing pump or inconsistent AdBlue level and quality readings can trigger a chain reaction — dashboard warning lights appear, power is curtailed and the vehicle enters a restricted safe mode. The Citroën C4 Cactus MD1CS003 AdBlue (SCR) Removal Emulator is a physical CAN-bus device that permanently closes off this fault chain at the electronic level, eliminating every SCR-related alert and restoring full engine performance.
How Does It Work?
The emulator plugs into the Citroën C4 Cactus's MD1CS003 ECU AdBlue connector via plug-and-play fitment — no wires are cut and no soldering is required. Once active, the device continuously simulates the pre- and post-catalyst NOx sensor signals, AdBlue level, temperature and quality sensor feedback, urea dosing pump and injector operation, and SCR catalyst conversion efficiency data — all within the value ranges the MD1CS003 ECU expects over CAN-bus. Receiving valid data on every channel, the ECU logs no fault codes and does not restrict engine power.
Frequently Asked Questions
Is this emulator compatible with all diesel versions of the Citroën C4 Cactus?
The emulator is compatible with Citroën C4 Cactus diesel models fitted with the MD1CS003 ECU. We recommend confirming your ECU type via an OBD diagnostic device or your service documentation before ordering.
Does installation damage the original wiring harness?
No. The emulator connects via plug-and-play to the original AdBlue connector. No wire cutting, soldering or ECU intervention is required. The device can be removed at any time without leaving any trace on the vehicle.
Can the emulator be removed and the vehicle returned to factory SCR configuration?
Yes. The emulator is a fully reversible solution. Once unplugged, the vehicle reverts to its original SCR configuration and the standard AdBlue system behaviour is restored.
What warranty and delivery terms apply?
Please refer to the product page for current warranty and delivery information, or contact our team directly before placing your order.
Supported Models
This emulator is compatible with the following models that share the same ECU platform:
Installation Video
Step-by-step installation — plug-and-play with no cutting or soldering. About 10 minutes.
