Fault description

Diagnosis monitors the entire secondary air system in terms of plausible operation and whether sufficient secondary air is injected into the system.

Cylinder bank 2:

Differential pressure of secondary air valve too high (>180 mba, provisional value)

OR

Differential pressure of secondary air valve too low (<50 mbar, provisional value)

Possible cause of fault:

General fault in secondary air system (leak or clogging).