2004 Nissan Titan p1278/p1279

2004 NISSAN TITAN
122,000 MILES • 5.6L • V8 • AUTOMATIC
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RICKMCVEIGH
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"service engine soon" light came on. Auto zone checked and came up with p1278-p1279 pm their computer. have checked this out online but cannot get a real solution answer.
May 8, 2015 at 8:26 AM
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WRENCHTECH
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You'll never get "real solutions" from a code number. They are merely information for a starting point and the actual cause has to be determined by a tech.

Those are both slow response to 2 different 0/2 sensors. That usually means they are clogged if that is the only code.
May 8, 2015 at 9:37 AM
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RICKMCVEIGH
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thanks for the rapid response. could you tell me where these 2 0/2 sensors are, and how do I get to them.

again thanks much

rick
May 8, 2015 at 2:14 PM
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WRENCHTECH
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They are the 2 upstream sensors for both sides which will be the ones before the Converters.
May 8, 2015 at 3:07 PM