Codes and related info

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frank020202
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Joined: Sun Feb 03, 2013 11:50 am

Codes and related info

Postby frank020202 » Tue Jul 08, 2014 11:14 am

I have a 99 pathfinder and have check engine light on and horrible gas mileage and vehicle smells like gas at the exhaust
codes are-P1168
P0151
P1148
P0131
Any body have any input? do I replace O2 sensor? any thing else?
Thanks!!!!!

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smj999smj
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Location: Prospect, VA

Postby smj999smj » Wed Jul 09, 2014 4:55 am

P1168 & P0151-Left bank, front oxygen sensor
P1148 & P0131-Right bank, front oxygen sensor

Refer to Nissan TSB #NTB99-004B. It details a testing procedure to test the resistance of the EGI grounds at the upper intake plenum and gives info on a supplemental ground harness and installation.
Since it smells like gas, you may want to check for leaks and/or excessive fuel pressure. It's possible that you have two, bad front oxygen sensors, but start with the TSB first.
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