Question about Nissan Sentra
The air flow sensor is different than an O2 sensor. The Mass Air flow sensor is located in the hose that comes from the air filter box. You can try taking it out and cleaning it with a spray cleaner that is fast drying meant for electrical components. It may just be dirty. DO NOT USE COMPRESSED AIR TO DRY THE SENSOR!!! It has very small, very fragile resistors inside that can break and ruin the sensor. If the light comes back on after cleaning the sensor, it will have to be replaced. Check the wires going to the sensor as well to make sure they are not damaged.
Hope this helps. Good luck!
Posted on Apr 09, 2011
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Posted on Jan 02, 2017
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P0174 - Fuel Injection System Too Lean Bank 2 Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Excessive Fuel Consumption Possible causes - Intake air leaks
- Front Heated oxygen sensor may be faulty
- Injectors may be faulty
- Exhaust gas leaks
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- Incorrect PCV hose connection Possible solution Dirty air filter of faulty air flow sensor are common causes of the problem. Bottom line possible defective Mass airflow sensor and or O2 sensor in cylinder bank number two.
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