P1196

Tests 1 - 3:

Tests 4 - 9:

SYMPTOM
P1196 2/1 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 > 18 mph < 55 mph, with a light load on the engine, for a period no less than five minutes.

SET CONDITION
The oxygen sensor signal voltage is switching from below 0.39 volt to above 0.6 volt 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