P0153 OBD Trouble Code

O2 Sensor Circuit Slow Response

HO2S Slow Response Conditions

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.

HO2S Circuit Slow Response Conditions

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)

HO2S Slow Response Conditions

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

Heated oxygen sensor (HO2S) 1, Bank 2 - slow response

Wiring, HO2S, fuel/intake system, injector, exhaust system, crankcase vent valve, MAF sensor, ECM