0037 code replaced 1/2, still have code, what next.

Question

Replaced O2 analyzer, still have issue, fuse is ggod

Answer 1

P0037 Bank 1 Sensor 2 heater circuit low

Measure the voltage of the fuse , it needs to be above 10 volts, below that you would set a heater circuit low code condition., if the voltage is good replace the 02 sensor heater relay just as the first step in resolving this code condition.