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Altima Nissan Altima Sedan Discussion Forum

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  #1  
Old 04-15-2009, 11:29 AM
07altimadriver
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Angry Strange OBD Code

My 07 Altima is throwing a code that reads P2A00. Of course it is not on the list of OBDII codes for Nissans. My mechanic is saying it is the Bank 1 O2 sensor...which I have now replaced twice in the past year to the tune of $250 each. Can anyone give a n idea on what may be causing this O2 sensor to go bad so often?
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Old 04-15-2009, 02:42 PM
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Quote:
Can anyone give a n idea on what may be causing this O2 sensor to go bad so often?
Are you using factory sensors? did you reprogram the ECM after the sensor was replaced?
Before replacing the next O2 sensor you should reprogram the ECM first.
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Old 04-16-2009, 04:13 AM
07altimadriver
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Default O2 Sensor replacement

Thanks for the reply. The local Nissan dealer replaced the Bank 1 O2 sensor both times, so I have to assume the SOP would include a reprogramming of the ECU. Tell me what happens if they didn't reprogram. What would the ECU do that took out the O2 sensor again?
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Old 04-16-2009, 04:15 AM
07altimadriver
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Sorry, meant ECM, not ECU.
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Old 04-16-2009, 03:22 PM
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Most likely as the reprogram is to correct the fuel mapping.
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