Audi
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Nitrogen oxides (NOx) sensor - signal too low
Cause:
    Exhaust leak, wiring short to ground, NOx sensor

Volkswagen
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Nitrogen oxides (NOx) sensor - signal too low
Cause:
    Exhaust leak, wiring short to ground, NOx sensor