DTC P1195: 1/1 O2 Sensor Slow During Catalyst Monitor: Testing
- Turn ignition on, engine not running. With the DRBIII® scan tool, read DTCs. Is the Good Trip counter displayed and equal to zero? If yes, go to next step. If no, refer to the INTERMITTENT CONDITION under SELF-DIAGNOSTICS SYSTEM.
- Start the engine. Inspect the exhaust for leaks between the engine and the O2 sensor. Inspect the exhaust for leaks between the engine and the appropriate rear O2 sensor. Are there any exhaust leaks? If yes, repair or replace the leaking exhaust parts as necessary. If no, go to next step.
- Backprobe the O2 sensor signal circuit at the O2 sensor harness connector and the Powertrain Control Module (PCM) harness connector. Start the engine. Allow the engine to idle. Is the voltage below 0.10 volt? If yes, go to next step. If no, repair the high resistance on the O2 sensor signal circuit.
- Backprobe the O2 sensor ground circuit at the O2 sensor harness connector and the PCM harness connector. Start the engine. Allow the engine to idle. Is the voltage below 0.10 volt? If yes, go to next step. If no, repair the high resistance on the O2 sensor ground circuit.
- There are no possible causes remaining, replace the O2 sensor
NOTE:
Check for contaminants that may have damaged the O2 sensor such as contaminated fuel, unapproved silicone, oil and coolant.
NOTE:
Ensure the voltmeter leads meet the terminals in the connector and that there is good terminal to wire connection. Ensure the voltmeter leads are connected for positive polarity.
NOTE:
Ensure the voltmeter leads meet the terminals in the connector and that there is good terminal to wire connection. Ensure the voltmeter leads are connected for positive polarity.