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o2 sensors
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  1. CM (2007-2012) Santa Fe
    Does anyone have a diagram with the locations of the o2 sensors? I pulled code P2297 and wanted to replace it but am not sure which one it is. I have the 2.4L
  2. Sonata YF Turbo
    Hello everyone, Does anyone have an idea why the voltage on the bank 1 sensor 2 of a 2014 Hyundai Sonata 2.0T will be zero? I already replaced the oxygen sensor and fuses, and the wiring harness looks okay. I also discovered that the compressor is not receiving power by testing the connector...
  3. MD (2011-2016) Elantra sedan/coupe
    My check engine light turned on and using my OBD2 i got code P0420 -Catalyst system efficiency below threshold (Bank 1) . I tested my O2 sensors and they are reading fine, Sensor one is jumping between .1 and .9 while O2 sensor 2 is holding steady at around 750 (between 735 -765). The CAT temps...
  4. General Hyundai Non-Model Specific Discussion
    '05 Tuscon V6 coded a misfire in cylinder 5. It previously coded an issue with the o2 sensor in bank 1, sensor 2. I didn't have access to a live scan tool and that sensor is a pita to check with a volt meter so I checked the spark plugs first. The plugs in 1, 3, and 5 had some carbon deposits...
  5. SM (2001-2006) Santa Fe
    2003 Santa Fe, 2.4 4 cyl. I got a P0421 code recently, so I thought I'd take a look at the cat and the O2 sensors to see what was going on, if they could be cleaned, etc. This is what I found: Looks like the top substrate has completely melted. Downstream O2 sensor also looks heat...
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