Lincoln MKZ: Warm Up Catalyst Efficiency → Below Threshold (Bank2)

P0431 is a standard OBDII trouble code, which means that it has the same meaning for the Lincoln MKZ as it would any other vehicle.  It is closely related to P0430 (which is one of the most popular OBDII codes). Warm Up Catalyst Efficiency → Below Threshold (Bank 2) When it’s the only trouble code … Read moreLincoln MKZ: Warm Up Catalyst Efficiency → Below Threshold (Bank2)