Question about 2000 Nissan Maxima
It means Heater Circuit for oxygen sensor bank 1 sensor 2. Basically the heater circuit on an oxygen sensor gets the vehicle into closed loop faster, compared to OBD I (on-board diagnostics 1) years earlier. Ultimately it helps in emmisions and fuel economy. Typically unless you have a bad connection in this particular O2 sensor, then you are going to find you must replace that particular O2 sensor.
Posted on Jul 17, 2009
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Posted on Jan 02, 2017
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