Chrysler
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    HO2S Shorted to Voltage Conditions
Cause:
    Engine running for 4 minutes, ECT over 180°F, then test started and PCM detected that the front HO2S-11 voltage was more than 1.5v.

Generic
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    O2 Sensor Circuit High Voltage

GM
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    HO2S Circuit High Input Conditions
Cause:
    Engine running in closed loop, throttle angle at 2-40%, then the PCM detected a HO2S-11 signal of over 900 mv for 2-4 minutes. • Refer to Monitor Test or code repair chart to test HO2S-11 operation, related circuits and then the PCM.

Nissan
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    Heated oxygen sensor (HO2S) 1, Bank 1 - voltage high
Cause:
    Wiring, HO2S, fuel system, injector, ECM