Hyundai
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Long term fuel trim - additive - mixture too rich
Cause:
    HO2S, fuel pressure, fuel system, mechanical fault, ECM

Mazda
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Throttle position (TP) sensor - stuck open
Cause:
    Wiring, TP sensor, ECM