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  1. YF (2011-2014) Sonata/i45
    I have looked at diagrams of this vehicle and it gives me multiple locations for the O2 sensor. The diagram shows two places for the 02 sensor if the car is SULEV and two if it is ULEV. My emissions certificate under the car hood says my vehicle is a ULEV. But I am seeing what lookes like the O2...
  2. 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
  3. 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...
  4. 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...
  5. 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...
  6. 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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