AdBlue / SCR OFF

Complete software disabling of the urea injection system: no warnings, no countdown, no start block.

SCR (Selective Catalytic Reduction) injects a urea solution — AdBlue / DEF — into the exhaust to reduce NOx emissions. The system has a tank, heaters, pump, injector, NOx sensors and its own complex diagnostics. When something fails, the car shows a countdown and eventually blocks the engine start.

Frequently asked questions

• Do I need to drain the AdBlue tank? — No, in most cases it is not required.
• What happens to the warnings and the countdown? — All SCR warnings and the remaining range counter are disabled.
• Do I need to remove the DPF or catalyst? — No. The DPF keeps working normally unless you order DPF OFF as well.
• Does it affect engine life, fuel consumption or smoke? — No.
• Will Check Engine stay on? — No, all SCR-related faults are disabled; diagnostics of other systems stay active.
• Do I need to refill AdBlue afterwards? — No.

Why owners choose SCR OFF

• Low reliability of heaters, pumps and NOx sensors;
• Engine start blocked when a fault appears or the level is low;
• Expensive parts and long waiting times.

Some cars (Hyundai, Kia, Genesis, Ford, Renault and others) have a separate dosing control unit — see ACM / DCU OFF.

Emission-related modifications (CAT, DPF/OPF, EGR, AdBlue/SCR, SAI) are supplied for off-road, motorsport and export use only, where permitted by local law. The customer is solely responsible for compliance with the regulations of their country.