Can an O2 Sensor Cause a Misfire?

oxygen sensor engine misfire

My most recent automotive repair started where most do, the dreaded check engine light. In this specific case, my 2004 Nissan Titan was running a little rough and, to be completely honest, when the light came on, it wasn’t a huge surprise. What was a surprise was the number of fault codes the ECM (engine control module) threw. In total, my OBD reader found five fault codes.

The identified fault codes were:

  • P0300 – Cylinder Misfire Detected Random Cylinders
  • P1288 – Air Fuel Ratio Sensor 1 Circuit Slow Response Bank 2
  • P1289 – Cylinder Head Temperature Sensor
  • P1168 – Closed Loop Control Function Bank 2
  • P0430 – Catalyst System Efficiency below Threshold Bank 2

At this point I was a little overwhelmed. Typically if you have 1 or 2 faults codes show up, it can be easy to identify your issue but this was something different.  I had to make a decision: was I going to drop it off at the shop and spend hundreds of dollars just to have them tell me what’s wrong or dive in and try to figure it out myself? Seeing as it was winter here in new England and I didn’t have a garage to work in, sending it to the shop was very appealing, but I just couldn’t justify spending that kind of money on something I more than likely could do myself.

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