Audi
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Altitude adoption - signal outside tolerance
Cause:
    Intake leak, MAF sensor, throttle control unit

BMW
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Intake manifold air control solenoid - ECM output stage
Cause:
    Wiring, intake manifold air control solenoid, ECM

Volkswagen
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Altitude adaption - signal outside tolerance
Cause:
    Intake leak, MAF sensor, throttle control unit