code po135

Question

I have a honda civic lx 2005 engine light on code reading po135 so I changed upper and lower o2 sensor and the o2 sensor relay and the o2 fuse is good I'm at a stand still please help

Answer 1

HI there

From the sounds of it you have something else causing the code. More then likely it's a short in the wiring to the sensor. The best method for testing this is to use a scan tool and read the voltage from the O2 sensor heater once the car is warmed up. If the voltage is to high, then it's a short to power. You may also have a bad aftermarket O2 sensor.