DTC P1195: Slow Upstream O2 Sensor During Catalyst Monitor: Testing
- Start engine and let idle. Inspect exhaust for excessive smoke caused by oil or coolant consumption. If an oil or coolant consumption problem is not present, go to next step. If an oil or coolant consumption problem is present, repair engine mechanical failure as necessary and replace O2 sensor 1/1.
- Inspect exhaust system for leaks between engine and catalytic converter. If exhaust leaks do not exist, go to next step. If exhaust leaks exist, repair or replace exhaust components as necessary.
- Turn ignition off. Disconnect O2 sensor 1/1 harness connector. Inspect harness connector and clean/repair as necessary. Measure resistance between ground and terminal No. 3 (Black/Orange wire) at O2 sensor 1/1 harness connector. See Figure . If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in Black/Orange wire between O2 sensor 1/1 and PCM.
- Inspect O2 sensor 1/1 connector for corroded, damaged, pushed out or miswired terminals. If connector and wiring are okay, go to next step. If connector and wiring is not okay, repair or replace as necessary.
- Turn ignition off. Disconnect Powertrain Control Module (PCM) harness connectors. PCM is located to left of Power Distribution Center (PDC) in engine compartment, next to air cleaner. Inspect PCM connectors for corroded, damaged, pushed out or miswired terminals. If connectors are okay, go to next step. If connectors are not okay, repair as necessary.
- If no other potential causes are remaining, replace O2 sensor 1/1.