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Symptom List: P1195-1/1 O2 SENSOR SLOW DURING CATALYST MONITOR Test Note: All symptoms listed above are diagnosed using the same tests. The title for the tests will be P1195-1/1 O2 SENSOR SLOW When Monitored and Set Condition: 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 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. 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 greater than 18 mph but less than 55 mph, with 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 O2S SENSOR GROUND CIRCUIT VOLTAGE DROP O2S SIGNAL CIRCUIT VOLTAGE DROP EXHAUST LEAK EXCESSIVE ENGINE BLOW BY O2S HEATER FEED CIRCUIT OPEN O2S HEATER GROUND CIRCUIT OPEN WIRING HARNESS INTERMITTENT PROBLEM O2 SENSOR TEST ACTION APPLICABILITY 1 Turn the ignition on. t, read DTCs. Is the Good Trip Counter displayed and equal to zero? All Yes → No → 149 DRIVEABILITY - GAS |