Check engine light came on so I took the car to Autozone to have them read the codes. P0031, P0037, P0051, P0057 all stated Heaated Oxygen Sensor........ heater circuit open or shorted. I just changed all 4 catalytic converters and their sensors about a year and a half ago.
SOURCE: 2004 Maxima Se codes P0037 and P0057. It says
the oxygen sensor looks like a spark plug with wires coming out of the top of it. it is screwed into the exhaust pipe near the engine. disconnect the wires and screw it out of the exhaust pipe turning it counterclockwise then screw the new one in and connect the wires. then clear the codes. one word of warning this is one of the most common codes and does not necessarily mean the sensor is bad. often it will appear if the engine is running too rich or lean because of another problem.
SOURCE: check engine light on
Diagnostic code produces P0420 catalyst system efficiency below threshold-Bank 1. Probable causes are listed as follows:
1-air leak in exhaust before rear 02 sensor, 3-Fuel system fault,
4-faulty catalytic converter.
SOURCE: Autozone code P0057 for Oxygen sensor heater
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