Audi
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Nitrogen oxides (NOx) sensor - signal outside tolerance
Cause:
    Catalytic converter, exhaust leak, wiring, NOx sensor

Volkswagen
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Nitrogen oxides (NOx) sensor - signal outside tolerance
Cause:
    Catalytic converter, exhaust leak, wiring, NOx sensor