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o2 sensor

  1. Troublesome VQ40DE

    Performance Mods
    Hi All, Hope this is the right forum/thread to post this, as there isn't really a great fit out there and this forum seems to be quite active with knowledgeable folk, so here it goes. Its a Navara, in oz, 2008 Spanish build 4.0 V6 petrol auto...its been around, with a healthy 355,000 odd km on...
  2. O2 Sensor Readings and P0171 Code

    DIY - Do It Yourself / Tech Tips
    Year: 2007 Engine: 4.0L V6 Mileage: 93,000 My service engine light recently came on, a bit after I noticed that my truck was idling erratically. So I pulled out my code reader and got a P0171 code (System too lean bank 1). After some further exploration, my initial thoughts are a faulty...
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