P0134 - Oxygen Sensor Slow Response test - Nissan

An oxygen sensor slow response or low activity trouble code is almost always a faulty oxygen sensor. There are a few other things to consider before replacing the oxygen sensor. Exhaust leaks upstream or very near the oxygen sensor as well as oxygen sensor heater circuit malfunctions can also set this code. 

Engine Performance Diagnostics chapter 5

Symptoms
- check engine light (P0134)
- poor gas mileage
- rough idle
- runs fine intermittently

Fix
- replace faulty oxygen sensor

Tests shown
- scan data O2 analysis

Tools used 
- scan tool

Replacing an Oxygen Sensor on Your Car

Learn about the benefits of Bosch Oxygen (O2) Sensors. Find out how to diagnose a worn O2 sensor - and learn how to replace an worn O2 sensor on your car.