Why does O2 sensor read lean?
Why does O2 sensor read lean? The real problem may not be a bad O2 sensor, but possibly be an engine vacuum leak, low fuel pressure or dirty fuel injectors that are causing the engine run lean. If an O2 sensor has failed, especially prematurely, the cause often is contamination. Like us, O2 sensors slow down as they age. Can an oxygen sensor measure engine load? The value measured by the oxygen sensor allows the control unit to adjust the amount of fuel injected to obtain an optimum mixture. This creates ideal conditions for treatment of the exhaust gases in...