Fault description

The diagnosis monitors the entire system 'secondary air' for the plausible function, if enough secondary air is injected into the system.

Cylinder bank 1:

Differential pressure from the secondary-air valve is too high (> 180 mbar, preliminary value!)

and

Lambda is to low.(< 1, 08; preliminary value)

Possible fault cause:

Jammed shut valve bank 1 or system blockage, rather bank 1