nissan Workshop Repair Guides

Nissan and Datsun Workshop Service and Repair Manuals

Oxygen Sensor - Thread Cleaning and Other Precautions|Page 3572 > < Oxygen Sensor - Thread Cleaning and Other Precautions|Page 3570
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Rear heated oxygen sensor switching frequency

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Front heated oxygen sensor switching frequency

This ratio should be less than 0.5. 
If the ratio is greater than 0.5, it means three way catalyst does not operate properly.

NOTE:  If the voltage at terminal (50) or (51) does not switch periodically more than 5 times within 10 seconds at step 3, perform TROUBLE
DIAGNOSIS FOR DTC P0130 or P0150 (0503 or 0303) first. 

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Oxygen Sensor - Thread Cleaning and Other Precautions|Page 3572 > < Oxygen Sensor - Thread Cleaning and Other Precautions|Page 3570