Chrysler
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    HO2S Slow Response Conditions
Cause:
    Engine runtime over 2 minutes, ECT sensor at 120-1709F, VSS at 10-20 mph for 2 minutes (throttle open), then return to idle in drive (A/T) or neutral (M/T), then test started and the PCM detected that the front HO2S-21 signal did not switch from 270-620 mv sufficiently during the test period.

Ford
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    HO2S Circuit Slow Response Conditions
Cause:
    Engine running in closed loop, then the PCM detected that the O2 sensor amplitude and frequency were out of range (rich to lean switch was over one second)

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

GM
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    HO2S Slow Response Conditions
Cause:
    DTC P0101, P0102, P0103, P0112, P0113, P0117, P0118, P0125, P0200, P0335, P0336, P0351-P0358, P1120, P1220, P1221 and P1258 not set, system voltage over 9v, ECT input more than 122°F and engine runtime over 120 seconds, engine speed at 1000-2300 rpm in closed loop, airflow from 20-50 g/sec, EVAP duty cycle over 0%, in closed loop, then the PCM detected that the HO2S-21 lean-rich average response time or that the rich-lean average response time was over 250 ms, condition met for more than one minute

Nissan
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    Heated oxygen sensor (HO2S) 1, Bank 2 - slow response
Cause:
    Wiring, HO2S, fuel/intake system, injector, exhaust system, crankcase vent valve, MAF sensor, ECM