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Hyperchargedvol
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| Posted: Jan 10 2012 at 9:43pm | IP Logged
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I have a 2006 Frontier CC 4x4 4.0 V-6. I am having a hard time getting rid of the P2A03 code. I have replaced the driver side front converter with a brand new one. A brand new up-stream O2 sensor was installed on driver side as well. I can clear the code and it will be back on within 25 miles. Observing the O2 sensors while driving 3 of them have voltage that runs between .320 volts and .800 volts. Most of the time the O2S21 (the one that is brand new) stays around .540 volts. When coasting down hill with accelerator not being used at all, the voltage goes to 1.250 volts. Somebody give me something to go on please!!
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frontierguy
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| Posted: Jan 11 2012 at 8:01pm | IP Logged
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P2A03 refers to the Air Fuel ratio sensor(not O2 sensor) @
2K rpm it should fluctuate around 1.5 volts. Check and
clean all engine grounds(on top of left timing chain cover)
along with main ground to engine and don't forget the
battery terminals also. If you are not using a Genuine
Nissan oil impregnated air filter, get one, also clean the
MAFS w/ approved cleaner.
__________________
'10 Altima SL
Traded 08 Frontier for 16 Frontier SV CC Long box, quite an upgrade. I do miss the 6 speed and Dynomax ex.
Nissan Technician 25 + years
2011 John Deere X720SE
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frontierguy
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| Posted: Jan 11 2012 at 8:09pm | IP Logged
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Check out the other post on PA203.
__________________
'10 Altima SL
Traded 08 Frontier for 16 Frontier SV CC Long box, quite an upgrade. I do miss the 6 speed and Dynomax ex.
Nissan Technician 25 + years
2011 John Deere X720SE
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Hyperchargedvol
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| Posted: Jan 12 2012 at 2:11pm | IP Logged
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Exhaust leak was the culprit.
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Nissan Frontier Forums : Problems / Technical
Topic: Dreaded P2A03
