Mazda Repair Questions? Ask Mechanics for Answers ASAP
Hello I will help you with your question,
Do you still need help with this?
Do you have a voltmeter to check the sensor operation?
Please respond on this page.
You will need to verify that the sensor voltage to the computer does change after the engine is warmed up and run at 1500 rpm. If you can get a meter I can help you test this.
The other things that affect the setting of this code are intake or exhaust leaks, even a small one will flatline the sensor.
Let me know if you can get a voltmeter