Question about 2003 Nissan Murano

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It has a fault number p1051 and p1168 pls tell me what to do

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P1051 and p1168:

P1051 A/F Sensor Heater (Added 29APR2007)
p1168 A/F Sensor Heater.

A/F Sensor The air fuel ratio (A/F) sensor like the oxygen sensor is used by the powertrain control module to measure the amount of oxygen in the exhaust. The PCM uses this data to control the air fuel mixture in the engine. The (A/F) sensor can meter fuel more accurately than an oxygen sensor. The A/F sensor changes current output by measuring the amount of oxygen in the exhaust. The A/F sensor operates at a much higher temperature than an oxygen sensor. The PCM measures the amount of current that is output by the A/F sensor and converts this current flow data to a voltage signal. When the mixture is lean and the oxygen content is high the voltage signal will be above 3.3V. When the mixture is rich and the oxygen content is low the voltage signal will be below 3.3V. When the mixture is at 14.7 to 1 the voltage signal will be at 3.3V. The heater circuit in the A/F sensor shortens the time required for the sensor to reach operating temperature and provides a more accurate signal.
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The A/F error is like an Oxygen Sensor error. There could be a problem with this sensor or the wiring to it causing voltages to be out of specifications.

Posted on Jul 31, 2010

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MALFUNCTION INDICATOR LAMP ON WITH DIAGNOSTIC TROUBLE CODE P0300-P0306, P1273 OR P1283. *TT *SC
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NHTSA Item Number : 10005976
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