Audi
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Mass air flow (MAF) sensor, Bank 1 & 2 - implausible ratio
Cause:
    EGR system, intake leak, wiring, MAF sensor 1/2

Honda
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Air fuel (AF) ratio sensor - front - low voltage positive terminal
Cause:
    Wiring, AF ratio sensor, ECM

Volkswagen
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Mass air flow (MAF) sensor, implausible ratio
Cause:
    EGR system, intake leak, wiring, MAF sensor 1/2