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I'm new to the forums and this is my first post. I have a 2012 Suzuki Frontier (rebadged frontier). It has the 2.5 cyl four cylinder, manual transmission, and is two wheel drive.

I keep getting P0317, p0318, p0319 codes. I'm wondering if this is a known issue on the four cylinder 2.5 and if so what y'all think the fix is. I'm thinking it's either the rear oxygen sensor or possibly a bad catalytic converter.

Any help would be appreciated.
 

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I assume you mean P0137, P0138, P0139. Those are all time/voltage out-of-range indicators for the rear HO2S, not cat efficiency codes. You probably just have a bad sensor, not a bad cat.
 

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NF Mod/Nissan Master Tech
2006 Pathfinder LE, 2003 Frontier SVE
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For replacement, stick with NTK (the OE manufacturer) or Denso. Rockauto.com has pretty good prices on oxygen sensors. You'll want either NTK # 24244 or Denso # 2344297. They run in the $60 range.
 

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Check pin-fits at the ECM and the sensor, too. Weak springs on connector pins are a common cause of these sorts of issues. A safety pin with 0.024~0.027" diameter makes a perfect tool for checking springs on the small ECM pins and most other Nissan connectors with small pin sizes.
 
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