Audi
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Mixture control (MC), Bank 1 - malfunction
Cause:
    Fuel pressure/pump, injector(s) intake leak

Subaru
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Intake manifold air control actuator, LH - stuck closed
Cause:
    Wiring, intake manifold air control actuator position sensor, ECM

Volkswagen
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Mixture control (MC), malfunction
Cause:
    Fuel pressure/pump, injector(s) intake leak