P1195 1/1 O2 Sensor Slow During Catalyst Monitor

SYMPTOM
P-1195 SLOW 1/102S DURING CATALYST MONITOR

WHEN MONITORED
With the engine running, coolant greater than 170 deg F, open throttle, steady to slight increasing vehicle speed > 18 mph < 55 mph, with a light load on the engine, for a period no less than five minutes.

SET CONDITION
The upstream oxygen sensor signal voltage is switching from below 0.39 volt to above 0.6 volt and back fewer times than required.

POSSIBLE CAUSES
- Oxygen sensor ground circuit open
- 1/1 oxygen sensor connector observable defect
- 1/1 oxygen sensor defective
- Engine fluid consumption
- Exhaust system leaking
- PCM connector observable defect