P0135 Honda -

Question

I have a 2004 Honda Civie EX that is throwing code P0135 & P0141. I have replaced the bank 1 sensor 1 o2 sensor and the code comes back on as soon as it is cleared. What other things should I look for?

Answer 1

P0135 A/F (airflow)  heater circuit malfunction (Sensor 1)

P0141 Secondary HO2S heater circuit malfunction (sensor 2)

Check the fuse , in the under dash fuse relay box, listed as fuse 4, and replace if open ,