P0031 Hyundai sonata

Question

Blowing snsr2. Have codes p 0452 p0031 p0051 p0052. Originally thought it was fuel pump. Changed it and it still wouldn't start. I can start it if the jump across relay otherwise it blows

Answer 1

Sensor 2 fuse ,also power up the fuel pump.You have a short if Sensor 2 fuse opens. Because you jump the fuel pump relay this only shows the short can not be at the fuel pump harness, So the shor is at the 02 sensor you may have to disconnect the 02 sensor and test from there if the fuse opens up you will need to open the harness of the 02 sensor