2. Diagnosis & Intervention Protocol à Berlin
Removing the catalyst changes the readings of the downstream lambda probe (after catalytic converter). The engine control unit (ECU) detects zero catalytic efficiency and turns on the check engine light (MIL) with fault code P0420.
3. Management and Technical Solutions
For the vehicle to operate optimally after a deletion, an engine reprogramming (Stage 2) and a software 'Cata OFF' are mandatory to adjust the injection and clear the errors.
4. Prevention and Maintenance in Berlin
Please note, a vehicle without a catalyst will no longer pass the technical anti-pollution inspection. This modification is strictly reserved for use on a closed circuit or in competition.