2000 Nissan quest code Po135

Question

I tested harness connectors, fuses, and were working well. Also I replace both oxygen sensor, and after 1 day the check engine light came out again. What would the problem be.

Answer 1

What you can do is check its power supply, these 02 sensor is fused protected, and is what turn on the heater for the 02 sensor, in the engine fuse /relay box, should be fuse 26 which is a 7.5 amp fuse. P01354 can also set if the 02 sensor is not properly torque down.