Acura
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Heated oxygen sensor (HO2S) - LH front - slow operation
Cause:
    Exhaust system, wiring, HO2S, ECM

GM
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    HO2S Transition Time Ratio Conditions
Cause:
    No ECT, EVAP, IAT, MAF, MAP, Misfire, TP or VSS codes set, DTC P0151, P0152, P0154 and P0155 not active, engine runtime over 75 seconds, engine speed from 1100-3000 rpm, ECT input more than 135°F, MAF input from 15-55 g/sec, EVAP Purge not active, EGR or Catalyst Tests not active, no device controls on, system voltage from 11.7-18v, system in closed loop, all conditions met for over 2 seconds, then the VCM detected that the number of Bank 2 lean-rich and rich-lean transitions within a 100 second sample period was less than a calibrated number

Honda
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Heated oxygen sensor (HO2S) - LH front - slow operation
Cause:
    Exhaust system, wiring, HO2S, ECM

Hyundai
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Heated oxygen sensor (HO2S) slow response
Cause:
    Heating inoperative, HO2S

Isuzu
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Heated oxygen sensor (HO2S) - LH front - slow operation
Cause:
    Wiring, HO2S, fuel system, fuel pressure, mechanical fault, ECM

Kia
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Heated oxygen sensor (HO2S) signal malfunction
Cause:
    HO2S, ECM

Subaru
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Heated oxygen sensor (HO2S) range/performance problem voltage low
Cause:
    Wiring, HO2S, ECM