Archive for March, 2010

Repair Honda Accord code 41 – O2 sensor heater circuit

Wednesday, March 10th, 2010

I recently fixed a persistent problem with my 90 Honda Accord EX with a F22A4 motor, that the oxygen sensor heater circuit was malfunctioning and throwing a “check engine” code #41, causing poor fuel economy. Here is how to troubleshoot this problem.