P1195

Tests 488 - 494:

Tests 495 - 496:

SYMPTOM
P1195 - 1/1 O2 SENSOR SLOW DURING CATALYST MONITOR

WHEN MONITORED
With the engine running, coolant greater than 170 °F, open throttle, steady to slightly increasing vehicle speed greater than 18 mph but less than 55 mph, with a light load on the engine, for a period no less than 5 minutes.

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

POSSIBLE CAUSES
- Excessive engine blowby
- Exhaust leak
- O2S sensor ground circuit voltage drop
- O2S Signal circuit voltage drop
- Wiring harness intermittent defect
- O2S defective