Honda Civic O2 Sensor Code Not Clearing Due to Power Issue in Heater Wire on Honda Civic

Some Honda Civic owners report experiencing persistent O2 sensor trouble codes that do not clear due to power issues in the heater wire. They often encounter the P0135 code, indicating a malfunction in the Primary Heated Oxygen Sensor (Sensor 1) Heater Circuit. These owners may find that a visual inspection of the O2 sensor and its wiring reveals damage, corrosion, or loose connections, which can lead to heater circuit malfunctions. Additionally, testing the O2 sensor's heater circuit for continuity and resistance is crucial, as improper readings may indicate a faulty sensor. If the heater wire is not receiving adequate power supply, the trouble code may remain unresolved. Many owners have had to replace faulty O2 sensors or repair damaged wiring to fix the issue. After addressing the underlying problems, they recommend using an OBD-II scanner to clear the fault codes and reset the ECM, followed by a test drive to confirm that the issue has been resolved.