Has my O2 sensor gone bad?

JustinM10123

So ive had a P2A00 code for the last week, recently just got a decent OBD2 scanner and was able to find out some data. Bank 1 Sensor 1 is the culprit and it turns out the voltage is steady around 1.8-2.3 and ive heard o2 sensor voltage is supposed to only be around .1-.9 and thats exactly where Bank 1 Sensor 2 is standing. Is this an indication that the sensor is bad or could this be something else causing it?

flyfish

There are 2 O2 sensors, I think you could clear the code and swap the sensors to see if the problem follows.

Take a look at the EC section of the FSM for trouble shooting steps, link below;

https://www.nicoclub.com/FSM/370Z/Coupe/


From the FSM:

P2A00 or P2096 89H 84H
The amount of shift in air fuel ratio (too lean)

P2A00 or P2097 8AH 84H
The amount of shift in air fuel ratio (too lean)


The output voltage computed by ECM from the A/F sensor 1 signal is shifts to the lean side for a specified period.

Possible causes;

• A/F sensor 1 (bank 1)
• A/F sensor 1 heater
• Heated oxygen sensor 2 (bank 1)
• Fuel pressure
• Fuel injector
• Intake air leaks
• Exhaust gas leaks

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