oxygen sensors keep coming back as not ready?

2017 NISSAN SENTRA
60,500 MILES
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RAH12
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  • 1 POST
My oxygen sensors keep coming back as not ready when I go for inspection, they tell me to drive more but I've driven 200 + miles and it's the same.
Oct 14, 2023 at 4:46 PM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
Does the engine temperature gauge stay on cold too long? If you don't have a gauge no worries, if the thermostat is stuck open the OBD2 system will not run through the monitors therefore the oxygen sensor will not be ready. Here is a generic guide to help you step by step with instructions in the diagrams below to show you how on your car:

https://www.2carpros.com/articles/replace-thermostat

Check out the images (below). Please let us know what happens.
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Oct 14, 2023 at 6:12 PM
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RAH12
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I don’t believe so I observed yesterday it only took a few minutes for the temperature gauge to start going up.
Oct 16, 2023 at 8:53 AM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
Okay, lets run the codes to see if any are stored.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please go over this guide and get back to us.

Oct 16, 2023 at 9:52 AM
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