Monitored & Set Conditions

DTC P0133: O2 SENSOR 1/1 SLOW RESPONSE  - Oxygen sensor, to monitor start and drive vehicle greater than 20 MPH and less than 55 MPH. Throttle open for a minimum 120 seconds. Coolant temp greater than 158°F (70°C) catalytic converter temperature greater than 1112°F (600°C) EVAP purge active. DTC will set if O2 sensor voltage switches only 11 times or less from lean to rich within 20 second during monitoring. This is a two trip fault.

DTC P0139: O2 SENSOR 1/2 SLOW RESPONSE  - Oxygen sensor, to monitor, start and drive vehicle greater than 20 MPH and less than 55 MPH. Throttle open for a minimum 120 seconds. Coolant temp greater than 158°F (70°C) catalytic converter temperature greater than 1112°F (600°C). DTC will set if O2 sensor voltage does not switch properly from lean to rich during monitoring. This is a two trip fault.