MINI Cooper R55, R56, P0420 – 276A Catalytic Converter Efficiency Low

MINI Cooper R55, R56, P0420 – 276A Catalytic Converter Efficiency Low

R55 Cooper Clubman and R56 Cooper with N12 engine
Vehicles produced from start of production up to December 6th, 2007

Service Engine Soon lamp is illuminated and the following fault is stored in the DME memory:

276A (P0420) Catalytic-converter conversion – Catalytic-converter efficiency too low.

The catalytic converter may be deteriorating, causing the catalytic converter monitoring to store the above fault in the DME memory.

Covered under the terms of the MINI New Vehicle Limited Warranty or MINI Emissions Warranty